JP2013176424A - Safe diet monitor and safe diet monitoring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide information on a change in dietary metabolism by a simple method.SOLUTION: A biometric device includes a bioelectric impedance measuring means for measuring a bioelectric impedance of the middle part of the trunk of a person to be measured. Bioelectric impedance change information indicating a change in the bioelectric impedance of the middle part of the trunk is generated, and a change in metabolism from a reference time point during a diet period is estimated on the basis of the bioelectric impedance change information. Induction information for making the person-to-be-measured safely go on a diet is output by being generated on the basis of metabolism change information on the estimated change of the metabolism.

Description

  The present invention relates to an apparatus and method for monitoring a diet.

  Patent Document 1 describes an apparatus that determines the level of change in visceral fat level by combining the change in body weight with the change in visceral fat.

JP 2009-219747 A

  As an indicator of the success of a diet, there is a tendency to focus on a decrease in body weight and abdominal circumference and a decrease in visceral fat mass. Generally, it is said that a change in weight loss of 1 kg of body weight corresponds to a change in weight loss of 1 cm of abdominal circumference (Japanese Society of Obesity). Patent Document 1 describes a technique for evaluating a diet by displaying a positive determination or a negative determination in accordance with an increase or decrease in visceral fat level as a method for simply monitoring the progress of dieting.

In general, however, weight loss changes well at the initial stage of the diet, but the stagnation period comes, and changes in weight and abdominal circumference are hardly seen. This is thought to be due in part to hormonal effects such as reduced thyroid hormone production, testosterone production, immune function decline, and leptin production. This is because the metabolism is lowered due to the influence on the hormone. However, no technique has been proposed for monitoring the progress of diet with a focus on metabolic changes.
Therefore, the present invention solves the problem of providing a safe diet monitoring device and a safe diet monitoring method capable of monitoring the progress of a safe diet by providing information on changes in metabolism due to diet in a simple method. Let it be an issue.

In order to solve the above-described problems, the present invention provides metabolic change information acquisition means for acquiring metabolic change information indicating a change in metabolism during the diet period of the subject, and the metabolic change information acquired by the metabolic change information acquisition means. And a diet guidance information generating means for generating guidance information for safely dieting the subject, and an output means for outputting the guidance information generated by the diet guidance information generating means. A safety diet monitoring device is provided.
The “diet period” is typically a period from the start to the end of the diet. When the diet is divided into a plurality of steps and performed step by step, one step of the diet may be the diet period, or all or a part of the plurality of steps may be the diet period. Further, during the diet period, any measurement time point may be regarded as a reference time point, and the reference time point may be regarded as the start time of the diet period. In other words, the diet period is a period from an arbitrary measurement time point (reference time point) to another measurement time point while the subject is working on the diet.
Metabolic change information indicating a change in metabolism is information indicating a change in metabolism from a certain reference time point. Information indicating changes in metabolism from the reference time point includes information indicating an increase or decrease in metabolism by comparing the metabolism at two measurement points, and information indicating changes in metabolism over time at multiple measurement points. Including. The metabolic change information acquisition means may acquire metabolic change information generated by an external device, or may estimate metabolic change information by itself based on measurement data measured by itself or an external device. Measurement data includes metabolic information estimated by respiratory gas analysis and bioelectrical impedance of the measurement subject (for example, bioelectrical impedance in the middle of the trunk).
The induction information includes induction information related to metabolism and other induction information. Examples of the induction information related to metabolism include information notifying that the metabolism has decreased, information notifying that the metabolism has increased or not changed, and information indicating that the metabolism has been recovered. The guidance information may be display information such as characters, schematic diagrams and graphs, voice information such as voice messages and notification sounds, and the like. As the output means, there are means for displaying guidance information as display information, means for notifying guidance information as voice information, and the like. Further, the guidance information may be output by printing, or data indicating the guidance information may be output to an external device.

According to the present invention, since the induction information for safely dieting the measurement subject is generated and output from the metabolic change information acquired by the metabolic change information acquisition means, the measurement subject responds to the change in metabolism. A diet can be performed. That is, when metabolism is lowered, it is possible to avoid adverse effects on the body due to further metabolism decline by refraining from diet restriction such as dietary restriction that further reduces metabolism. It is also possible to perform exercises for increasing metabolism. On the contrary, when the metabolism is rising or when there is no change, the measurement subject can know that his / her body is in a state suitable for dieting.
Therefore, according to the present invention, it is possible to monitor the progress of a safe diet by providing information on changes in metabolism due to diet by a simple method.

  In addition, the present invention provides a metabolic change information acquisition step for acquiring metabolic change information indicating a change in metabolism during the diet period of the subject, and based on the metabolic change information acquired in the metabolic change information acquisition step, A diet monitoring information generating step for generating guide information for safely dieting the measurement subject, and an output step for outputting the guide information generated in the diet guide information generating step I will provide a. According to the present invention, it is possible to obtain the same effect as that of the safety diet monitoring device.

In a preferred aspect of the present invention, the safety diet monitoring device further includes physique change information acquisition means for acquiring physique change information indicating a physique change including at least one of weight and abdominal circumference during the diet period of the subject. And the diet induction information generating means safely allows the subject to be measured based on the metabolic change information acquired by the metabolic change information acquisition means and the physique change information acquired by the physique change information acquisition means. You may make it produce | generate the guidance information for making it diet.
The physique change information indicating changes in physique such as waist circumference and weight is a useful diet index that can monitor the progress of the diet. However, during the diet period, there may be a stagnation period in which the abdominal girth and weight loss stagnate even though the intake of calories is refrained due to dietary restrictions. In this aspect, guidance information is generated based on metabolic change information and physique change information during the diet period of the measurement subject. In other words, the change characteristics of the physique change information and the change characteristics of the metabolic change information can be comparatively analyzed, so if the metabolism is reduced in the stagnation period where no physique change is observed, the metabolism decline and the physique change The relationship with the stagnation period is estimated, and guidance information based on the estimation result can be generated. Therefore, in comparison with the mode in which the guidance information is generated based only on the metabolic change information, the guidance information based on a more comprehensive analysis can be provided to the measurement subject.

In a preferred aspect of the present invention, the metabolic change information acquisition means acquires bioelectric impedance change information acquisition means for acquiring bioelectric impedance change information indicating a change in bioelectric impedance of the middle trunk of the subject during the diet period. And metabolic change information estimation means for estimating the metabolic change information in the diet period of the subject based on the bioelectric impedance change information acquired by the bioelectric impedance change information acquisition means. Good.
The bioelectrical impedance change information may be any information as long as it is information that reveals a change in the bioelectrical impedance in the middle trunk, for example, the measurement result value of the bioelectrical impedance in the middle trunk. Alternatively, it may be normalized by some reference value. The normalized information includes the rate of change normalized by the bioelectrical impedance measured at the reference time point during the diet period.
Metabolic changes during the diet are thought to be due in part to hormonal effects. When metabolism decreases due to the influence on hormones, blood flow from blood vessels to organs, muscle tissues, and peripheral tissues decreases, so that the tissue moisture content decreases and the value of bioelectrical impedance increases. In addition, the electrical conductivity of the biological tissue is almost governed by the electrical conductivity of a bodily fluid having the same electrical characteristics as the physiological saline in the tissue, but when the body temperature decreases due to a decrease in metabolism, the bioelectrical impedance increases. This is because physiological saline has an electrical temperature characteristic that impedance increases with a temperature drop.
Among the skeletal muscles, internal organs, and fats (visceral fat and subcutaneous fat) that make up the middle of the trunk, skeletal muscles and internal organs are tissues that are dominated by water (body fluids). The sensitivity is particularly high. Therefore, the bioelectrical impedance of the middle trunk can be said to be particularly useful information indicating a change in metabolism.
Therefore, in the present invention, bioelectric impedance change information indicating a change in bioelectric impedance in the middle of the trunk is acquired, and metabolic change information is estimated based on the acquired bioelectric impedance change information. According to this aspect, it is possible to estimate information related to metabolic changes due to diet by a simple method, and it is possible to monitor the progress of safe diet.

In a preferred aspect, the bioelectrical impedance change information acquisition unit measures the bioelectrical impedance of the middle trunk and outputs it as a measurement result value, and the body measured by the bioelectrical impedance measurement unit You may make it have bioelectrical impedance change information generation means which produces | generates the said bioelectrical impedance change information in the said diet period of the said to-be-measured person based on the measurement result value of the bioelectrical impedance of the trunk middle part.
According to this aspect, the bioelectrical impedance of the middle trunk is measured by the bioelectrical impedance measuring means provided in the safety diet monitoring device, and the bioelectrical impedance change is based on the measurement result value measured by the bioelectrical impedance measuring means. Since the information is generated, it is possible to estimate the metabolic change information from the bioelectrical impedance change information and generate the guidance information by the safety diet monitoring device alone without acquiring the bioelectrical impedance change information from the external device. .

In addition, as a preferred aspect in the case of estimating metabolic change information based on bioelectrical impedance change information in a diet period, the diet induction information generating means is configured such that the physique of the subject is measured from a reference time point in the diet period. , When changing toward slimming, based on the physique change information acquired by the physique change information acquisition means, the start time of the stagnation period in which the change in physique stagnates is detected, and the bioelectrical impedance change at the start time It may be determined whether the information exceeds the first threshold value, and if the determination condition is affirmed, information that warns of a decrease in metabolism may be generated as the guidance information.
According to this aspect, when the start time of the stagnation period in which the change in physique stagnates is detected and the bioelectrical impedance change information is higher than the first threshold at the start time, the guidance information that warns the decrease in metabolism is displayed. Therefore, the measurement subject can know the decrease in metabolism in the stagnation period in which the change in physique is stagnant.
When the bioelectrical impedance change information is a measurement result value of the bioelectrical impedance, the first threshold value may be determined according to the bioelectrical impedance at the reference time point. A typical reference time is the start of the diet period. Moreover, in a diet, it is common to reach a stagnation period in which the change in physique stagnate after the physique of the person being measured changes toward the slim due to dietary restrictions and exercise. When starting a diet, metabolism tends to decrease. Metabolism recovers during the stagnation period, but the state of internal tissues such as the muscle and fat of the subject has changed from the start of the diet, so even if the metabolism is recovered, the extent is consistent with the start of the diet Is not limited. If further dieting is attempted in this state, this time point may be set as the reference time point.

Preferably, when the diet induction information generating unit detects that the bioelectrical impedance change information has converged to a state below a second threshold value lower than the first threshold value after detecting the start time of the stagnation period Alternatively, information indicating that the decrease in metabolism is recovered may be generated as the guidance information. Preferably, the diet guide information generating means is
Detecting that the bioelectrical impedance change information decreases and falls below the second threshold, or detects that the bioelectrical impedance change information decreases and falls below the second threshold for a predetermined time By doing so, it may be detected that the bioelectrical impedance change information has converged to a state below the second threshold value.
In any aspect, it is possible to detect that the bioelectrical impedance change information has changed from an increased state to a decreased state, and generate and output induction information indicating that the decrease in metabolism is recovered. Therefore, the person to be measured can know that the decreased metabolism has been recovered during the diet period, and can proceed with the diet in a safer state.

  Further, the bioelectrical impedance change information generating unit is configured to generate the bioelectrical impedance based on the bioelectrical impedance of the middle part of the body of the subject measured during a stable period in which a stable measurement result value is obtained during a day. Impedance change information may be generated. The measurement result value of bioelectrical impedance in the middle of the trunk can be affected by various biological conditions such as the presence or absence of defecation, eating and drinking, body temperature, blood pressure, blood flow, etc. There are periods (time zones) that vary greatly and periods (time zones) that are relatively stable. Therefore, in order to obtain accurate change information of the bioelectrical impedance of the middle trunk, the bioelectrical impedance of the middle trunk in a period in which the state of the living body is relatively stable, that is, a period in which a stable measurement result value is obtained. It is desirable to use According to this aspect, since the bioelectrical impedance change information is generated based on the bioelectrical impedance of the middle trunk measured during the period of the stable measurement result value, the middle trunk measured without considering the stable period Compared to the case where bioelectrical impedance is used, it is possible to acquire accurate bioelectrical impedance change information.

In a preferred aspect of the present invention, the metabolic change information acquisition means acquires estimated tissue amount change information indicating tissue amount change information indicating a change in tissue amount estimated from bioelectrical impedance of the middle trunk of the subject during the diet period. You may make it have an information acquisition means and the metabolic change information estimation means which estimates the said metabolic change information based on the tissue quantity change information in the diet period acquired by the said estimated tissue quantity change information acquisition means. “Tissue mass” includes visceral fat mass, organ mass, skeletal muscle mass and the like that can be estimated using bioelectrical impedance in the middle of the trunk.
As described above, the state of bioelectrical impedance change in the middle of the trunk during the diet period well reveals the state of metabolic change. For this reason, it can be said that the change information of the tissue amount estimated from the bioelectrical impedance of the middle trunk in the diet period also clearly shows the change of metabolism. In this aspect, metabolic change information is estimated based on tissue mass change information estimated based on the bioelectrical impedance of the middle trunk, and guidance information is generated based on the metabolic change information. Therefore, also in this case, it is possible to estimate information on changes in metabolism due to diet by a simple method, and it is possible to monitor the progress of safe diet.

Preferably, the estimated tissue amount change information acquisition unit measures the bioelectric impedance of the middle trunk and outputs it as a measurement result value, and the middle trunk measured by the bioelectric impedance measurement unit And tissue amount change information generating means for generating the tissue amount change information based on the measurement result value of the bioelectrical impedance.
According to this aspect, the bioelectrical impedance of the middle trunk is measured by the impedance measuring unit provided in the safety diet monitoring device, and the tissue amount change information is generated based on the measurement result value measured by the bioelectrical impedance measuring unit. Therefore, without acquiring bioelectrical impedance change information from an external device, the safety diet monitoring device alone can estimate metabolic change information from tissue mass change information and generate guidance information.

Preferably, the estimated tissue amount change information generating unit is configured to generate the tissue based on the bioelectrical impedance of the middle part of the body of the subject measured during a stable period in which a stable measurement result value is obtained during a day. You may make it produce | generate quantity change information.
As described above, in order to acquire accurate change information of the bioelectrical impedance of the middle trunk, it is desirable to use the bioelectrical impedance of the middle trunk measured during a period in which the state of the living body is relatively stable. According to this aspect, since the tissue amount change information is generated based on the bioelectrical impedance of the middle trunk measured during the period of the stable measurement result value, the living body of the middle trunk measured without considering the stable period Compared with the case where electrical impedance is used, it is possible to acquire accurate tissue amount change information.

As a preferred aspect of the safety diet monitoring apparatus, the bioelectrical impedance measuring means has a respiratory fluctuation removing means for removing fluctuation due to breathing of the bioelectrical impedance in the middle of the trunk, and the respiratory fluctuation removing means You may make it make the minimum value of the time series data of the bioelectrical impedance of the said several trunk cores in a period be the said measurement result value.
Since the resistance value of air is large, if the bioelectrical impedance of the middle trunk is measured at the timing when the subject inhales (that is, the air flows into the lungs), Compared to the case of measurement, the measured value of the impedance in the middle of the trunk becomes higher. According to this aspect, the minimum value of the bioelectrical impedance of the middle trunk (at the time of expiration) in one respiratory cycle is adopted as the measurement result value of the bioelectrical impedance of the middle trunk. The influence on the measured impedance value due to the inflow of air into the filter is eliminated or reduced.

In another preferred embodiment, the bioelectrical impedance measuring means determines whether or not the measurement result value is within an allowable range by a determination means that determines whether or not the measurement result value is within an allowable range. When it is determined, it may have a notifying means for notifying information indicating abnormality of the measurement result value.
The bioelectrical impedance in the middle of the trunk varies greatly depending on food and drink and urinary bladder retention. Since moisture easily flows current, the measured impedance value is low when the moisture content in the body is increased by eating or drinking. In this aspect, when the measurement result value is not within the allowable range, the measurement result value is notified to the measurement subject, so it is possible to secure a more reliable measurement result value of bioelectrical impedance. It becomes.

It is a block diagram shown about the electric constitution of the living body measuring device concerning a 1st embodiment of the present invention. It is a perspective view which shows the example of an external appearance of a biometric apparatus. It is explanatory drawing which shows electrode arrangement | positioning of a biometric apparatus. It is a figure for demonstrating the example of arrangement | positioning of a current electrode and a voltage electrode. It is a schematic diagram which shows the outline of the structure | tissue which comprises a trunk middle part. It is a circuit diagram which shows the equivalent circuit of the bioelectrical impedance of the trunk. It is a flowchart which shows operation | movement of a biometric apparatus. It is a figure which shows an example of a useful measurement timing period. It is a flowchart which shows the detailed flow of the bioelectrical impedance measurement process of a trunk middle part. It is a flowchart which shows the detailed flow of a respiration variation correction process. It is a flowchart which shows the detailed flow of an abnormal value determination process. It is a flowchart which shows the detailed flow of a metabolic change information generation process and a diet induction | guidance | derivation information generation process. It is a figure which shows an example of a metabolic condition monitor screen. It is a figure which shows another example of a metabolic condition monitor screen. It is a figure which shows the example of a display of the metabolic condition monitor screen concerning a modification. It is a flowchart which shows operation | movement of the biometric apparatus concerning 2nd Embodiment of this invention. It is a flowchart which shows the detailed flow of the metabolic change information generation process and diet induction information generation process concerning 2nd Embodiment. It is a figure for demonstrating the metabolic change information generation process and diet induction information generation process concerning 2nd Embodiment. It is a figure which shows an example of a metabolism fall monitor screen. It is a flowchart which shows the respiratory variation correction process concerning a modification. It is a figure for demonstrating the example of arrangement | positioning of the current electrode and voltage electrode concerning a modification.

1. First Embodiment 1-1: Configuration of Biometric Apparatus The biometric apparatus according to the present embodiment can safely measure a subject based on metabolic change information indicating a change in the subject's metabolism during a diet period. By providing guidance information for dieting to the subject, it is possible to monitor the diet safely. Specifically, the biometric apparatus according to the present embodiment generates bioelectrical impedance change information indicating changes in the measured bioelectric impedance of the middle trunk, and estimates metabolic changes based on the bioelectrical impedance change information. To do. Then, based on the metabolic change information indicating the estimated metabolic change, guidance information for safely dieting the measurement subject is generated and displayed.
In the present embodiment, a mode in which weight change information indicating a change in body weight and bioelectrical impedance change information is displayed as the guide information in addition to the guide information related to metabolism generated based on the metabolic change information will be described. Not only body weight but also waist circumference is an important index that reveals the effect of diet. Therefore, instead of the weight change information or in addition to the weight change information, an aspect in which the waist change information indicating the change of the waist circumference is displayed as the guidance information can be considered. In the present embodiment, an example in which weight change information is displayed will be described, but abdominal circumference change information is also applicable.

FIG. 1 is a block diagram showing a configuration of a biometric apparatus 1 according to an embodiment of the present invention.
The biometric apparatus 1 includes a management unit 100 that measures body weight and manages the operation of the entire apparatus, and a bioelectrical impedance measurement unit 200 that measures bioelectrical impedance of each part of the measurement subject. The management unit 100 includes a weight scale 110, a first storage unit 120, a second storage unit 130, a sound processing unit 140, a speaker 145, an input unit 150, and a display unit 160. These components are connected to a CPU (Central Processing Unit) 170 via a bus.

  The CPU 170 functions as a control center that controls the entire apparatus. The CPU 170 operates by receiving a clock signal from a clock signal generation circuit (not shown). In addition, each component is supplied with power from a power supply circuit when a power switch (not shown) is turned on. The CPU 170 can execute various timing operations based on the reference clock generated by the clock signal generation circuit, and can count the current date and time (year / month / day and time). When the weight of the person to be measured and the bioelectrical impedance of the middle trunk are respectively measured by the weight scale 110 and the bioelectrical impedance measuring unit 200, the CPU 170 measures the measurement result value and indicates the generated current date and time information. It memorize | stores in the 1st memory | storage part 120 with time information.

  Here, body weight is an important index that reveals the effect of diet. In other words, if the weight does not decrease despite working on the diet, it can be considered that there is some cause that prevents the weight loss. Since a decrease in metabolism can contribute to preventing weight loss, the progress of a safe diet can be determined by comparing weight change information indicating changes in weight with induction information related to metabolism generated based on the metabolic change information. It becomes possible to monitor. Therefore, in this embodiment, weight change information indicating a change in weight is acquired and displayed as guidance information for allowing the person to be measured to diet safely.

The weight scale 110 measures the weight of the person to be measured, and outputs the measurement result value of the measured weight to the CPU 170 via the bus. The first storage unit 120 is a non-volatile memory, and includes, for example, a hard disk or an EEPROM (Electrically Erasable Programmable Read-Only Memory). The first storage unit 120 stores a control program for controlling the entire apparatus. CPU 170 executes a predetermined calculation according to the control program. In addition, the first storage unit 120 includes personal data (height, age, sex, etc.), user ID, registration data, and advice information input via the input unit 150, smoothing processing, minimum value (or maximum value). Various calculation formulas and other information for determination data moving averaging processing and respiratory fluctuation central calculation processing are stored. The registered data includes the measurement result value of the body weight measured by the weight scale 110 and the measurement result value of the bioelectrical impedance of the middle trunk measured by the bioelectrical impedance measuring unit 200 in association with the measurement time information. When the registered data includes the measurement result value at the reference time, a reference time flag is further included. This registration data is continuously stored unless reset by an instruction from the measurement subject or measurement assistant via the input unit 150. The advice information is a message template to be displayed to the measurement subject, and includes various messages (messages for prompting measurement after defecation and urination) used for measuring the bioelectrical impedance of the middle trunk.
The reference time point flag will be described in detail later, but the registration data including the reference time point flag indicates that the bioelectrical impedance of the middle trunk used as a reference when calculating the change rate of the bioelectrical impedance or the weight of the middle trunk. Measurement value or body weight measurement result value.

  The second storage unit 130 is a volatile memory, and includes, for example, a DRAM (Dynamic Random Access Memory) or the like. The second storage unit 130 functions as a work area of the CPU 170, and stores data when the CPU 170 executes a predetermined calculation. The second storage unit 130 includes, for example, display data Ia, Ig, Ib0 to Ib4, Ia1, Ig1, Ibn0 to Ibn5, a line graph Gw (weight change information) and a line graph Gz (bioelectrical impedance change information) (both described later). ) And the like are temporarily stored, and registration data read from the first storage unit 120, advice information, and the like are temporarily stored. In addition, the audio processing unit 140 amplifies an audio signal obtained by DA converting audio data under the control of the CPU 170 and outputs the amplified audio signal to the speaker 145. The speaker 145 converts the amplified audio signal into vibration and emits the sound. As a result, it is possible to notify by voice of induction information related to metabolism during the diet period, and to notify by sound when an abnormal value due to eating or drinking or urinary bladder retention is detected.

  The input unit 150 includes various switches such as an up key, a down key, and a determination key used for selecting functions and increasing / decreasing numbers. When the measurement subject or a measurement assistant operates the switches, the height, age, and sex Such information is input. The display unit 160 displays the measurement result of the body weight, the bioelectrical impedance of the middle trunk and other biometric indicators, and the metabolic condition monitor screen generated by the guidance information generation process (described later). In addition, when an abnormal value due to eating or drinking or urinary bladder retention is detected, it has a function of notifying the subject of the abnormality, or a function of displaying a message prompting the subject or a measurement assistant to input various information. . In this embodiment, the input unit 150 includes a touch panel type liquid crystal display device integrated with the display unit 160.

The bioelectrical impedance measuring unit 200 measures the bioelectrical impedance of the middle part of the trunk of the subject (human body) (bioelectrical impedance measuring means). The bioelectrical impedance measurement unit 200 includes an alternating current output circuit 210, a reference current detection circuit 220, a potential difference detection circuit 230, an A / D converter 240, and electrode switching circuits 251 and 252.
The alternating current output circuit 210 is a means for generating a reference current Iref. The alternating current output circuit 210 generates the reference current Iref so that the effective value of the reference current Iref becomes a predetermined value. The reference current detection circuit 220 detects the magnitude of the reference current Iref flowing through the object to be measured and outputs it as current data Di to the CPU 170 and energizes the person to be measured with the reference current Iref. In this case, the electrode switching circuit 252 selects two of the current electrodes X1 to X4 and supplies current.
Further, the potential difference detection circuit 230 detects a potential difference between two voltage electrodes selected from the voltage electrodes Y1 to Y4 by the electrode switching circuit 251 to generate a potential difference signal ΔV. The A / D converter 240 converts the potential difference signal ΔV from an analog signal to a digital signal and outputs it to the CPU 170 as voltage data Dv. The CPU 170 calculates a bioelectric impedance Z (= Dv / Di) based on the voltage data Dv and the current data Di.

The first storage unit 120 can store various data in advance. For example, a correlation equation or a correlation table for calculating body fat fat percentage and muscle mass using the bioelectrical impedance of each part as a variable is stored.
The CPU 170 controls arithmetic processing such as bioelectrical impedance of the middle part of the subject's trunk, measurement processing such as the subject's weight, and various input / output processes. The CPU 170 determines the skeletal muscle mass, organ mass, visceral fat mass, visceral fat mass, subcutaneous fat mass, subcutaneous fat mass, body fat mass, and the like based on the bioelectric impedance of the middle trunk by the bioelectric impedance measuring unit 200. It is also possible to calculate the biological index.

  In FIG. 2, the example of an external appearance of the biometric apparatus 1 is shown. The biometric device 1 has an L-shape and includes a columnar casing 30 on the pedestal 20. The pedestal 20 is provided with a current electrode X1 and a voltage electrode Y1 for the left foot, and a current electrode X2 and a voltage electrode Y2 for the right foot. A display unit 160 is provided on the upper portion of the housing unit 30. Further, left and right electrode portions 30 </ b> L and right hand electrode portions 30 </ b> R are provided on the left and right side surfaces of the housing 30.

  FIG. 3 is an enlarged view in which the upper part of the housing part 30 is enlarged. As shown in this figure, the left-hand electrode portion 30L includes a current electrode X3 and a voltage electrode Y3, and the right-hand electrode portion 30R includes a current electrode X4 and a voltage electrode Y4. The person to be measured performs measurement by standing on the pedestal unit 20 and holding the electrode unit 30L and the electrode unit 30R with the left and right hands lowered.

  The electrode switching circuits 251 and 252 select eight electrodes to be worn on both hands and both feet under the control of the CPU 170. By appropriately selecting these eight electrodes, it becomes possible to measure the bioelectrical impedance of the middle trunk (bioelectrical impedance Ztm of the middle trunk described later). For example, as shown in FIG. 4A, the reference current Iref is supplied between the left hand current electrode X3 and the left foot current electrode X1, and the right hand voltage electrode Y4 and the right foot voltage electrode Y2 are connected. If the potential difference is measured between the two, the bioelectrical impedance in the middle of the trunk can be measured. Also, as shown in FIG. 4B, the reference current Iref is supplied between the right-hand current electrode X4 and the right-foot current electrode X2, and the left-hand voltage electrode Y3 and the left-foot voltage electrode Y1 are connected. If the potential difference is measured between the two, the bioelectrical impedance in the middle of the trunk can be measured.

  Further, as shown in FIG. 4C, the reference current Iref is supplied between the right hand current electrode X4 and the left foot current electrode X1, and the left hand voltage electrode Y3 and the right foot voltage electrode Y2 are connected. By measuring the potential difference between the two, it is possible to measure the bioelectrical impedance that crosses the middle part of the trunk diagonally. As shown in FIG. 4D, the reference current Iref is supplied between the current electrode X2 for the right foot and the current electrode X3 for the left hand, and between the voltage electrode Y4 for the right hand and the voltage electrode Y1 for the left foot. By measuring the potential difference, bioelectrical impedance that crosses the middle of the trunk diagonally can be measured.

  FIG. 5 is a diagram schematically showing the structure of the middle trunk, and the tissues constituting the middle trunk include the subcutaneous fat FS, the skeletal muscle MM, the internal organs VM, and the internal organs attached to the gaps between the internal organs VM. Can be considered a fat FV. Of the human body, the portion excluding the head and limbs is the trunk, and the middle trunk includes the abdomen. That is, the abdomen is a part of the middle trunk.

FIG. 6 shows the structure of the trunk in FIG. 5 as an electrical equivalent circuit. Here, Ztm represents the bioelectrical impedance of the middle trunk, Zmm represents the bioelectrical impedance of the skeletal muscle, Zvm represents the bioelectrical impedance of the internal organ, and Zfv represents the bioelectrical impedance of the visceral fat.
In this equivalent circuit, bioelectrical impedance of subcutaneous fat is omitted. Subcutaneous fat FS has a higher volume resistivity than other constituent tissues, and can be omitted from the equivalent circuit of the middle trunk. That is, a simplified trunk equivalent circuit in which the subcutaneous fat FS is omitted is shown. It is considered that the impedance values measured in the middle trunk include information on visceral fat FV excluding subcutaneous fat FS in the middle trunk and lean tissue (skeletal muscle MM and internal organ VM). Can do.

When energizing the middle part of the trunk, most of the current is considered to be energized to the skeletal muscle tissue. This is because the electrical conductivity of the skeletal muscle tissue layer is better than that of other tissues. The internal organ VM is considered in series with the visceral fat FV, and it can be seen that a change in the energization amount can be expected depending on the amount of the visceral fat FV.
However, during the diet period, the water content of the skeletal muscle MM and internal organs VM decreases due to a decrease in metabolism, so the change in bioelectrical impedance in the middle trunk does not necessarily reflect only the change in visceral fat content. This also reflects changes in the amount of water in the skeletal muscle MM and the internal organs VM.

  In the initial stage of the diet, weight loss changes well, but the stagnation period comes, and changes in body weight such as weight and waist circumference are hardly seen. This is thought to be due in part to hormonal effects such as reduced thyroid hormone production, testosterone production, immune function decline, and leptin production. This is because the metabolism is lowered due to the influence on the hormone.

  The decrease in metabolism due to the influence on the hormone is accompanied by a decrease in blood flow from blood vessels (including changes in the expansion and contraction of blood vessels) to organs, muscle tissues, and peripheral tissues, resulting in a decrease in tissue moisture content. When the tissue moisture content decreases, the value of bioelectrical impedance increases. Moreover, body temperature (deep body temperature) falls by the fall of metabolism. The electrical conductivity of a living tissue is almost governed by the electrical conductivity of a body fluid having electrical characteristics equivalent to that of physiological saline in the tissue. Physiological saline has an electrical temperature characteristic that bioelectrical impedance decreases with increasing temperature. That is, in the living body, the bioelectrical impedance increases due to a decrease in body temperature. Thus, both the decrease in body temperature and the decrease in blood flow work in the direction of raising the bioelectrical impedance.

  Since the skeletal muscle MM and the internal organs VM (FIG. 5) constituting the middle trunk are water-dominated tissues, the bioelectrical impedance of the middle trunk corresponds to the change in the moisture content in the skeletal muscle MM and the internal organs VM. The sensitivity is particularly high. Therefore, the change in bioelectrical impedance in the middle of the trunk during the diet period is due to two factors that are closely related to the metabolism of skeletal muscle MM and internal organ VM (ie, decrease in body temperature and decrease in blood flow). It includes results that have been affected and changed.

In addition, fat has a high resistivity and thus has low conductivity. For this reason, when the visceral fat amount increases, the bioelectrical impedance of the middle trunk is increased, and when the visceral fat amount decreases, the bioelectrical impedance of the middle trunk is decreased. Since the visceral fat mass usually decreases during the diet period, the bioelectrical impedance in the middle of the trunk should decrease. Therefore, it can be considered that the increase in bioelectrical impedance in the middle trunk during the diet period is not an increase in visceral fat mass but rather a decrease in metabolism. That is, it can be said that the state of bioelectrical impedance change in the middle of the trunk during the diet period well reveals the state of metabolic change.
Therefore, in this embodiment, paying attention to the change characteristic of the bioelectrical impedance (mid-trunk impedance) Ztm in the middle trunk, the metabolic change during the diet period is monitored.

1-2: Operation of Biometric Device FIG. 7 is a flowchart showing the operation of the biometric device 1. First, when a power switch (not shown) in the input unit 150 is turned on, power is supplied to each part of the electric system from a power supply unit (not shown), and a screen for inputting personal data is displayed on the display unit 160 ( Step S1). As the personal data, if a person to be measured has already been registered in the biometric apparatus 1, the person to be measured or a measurement assistant inputs information (for example, a user ID) for identifying the person to be measured. If not registered, the person to be measured or the measurement assistant inputs basic information such as height, gender, age, etc., and registers personal data.
Subsequently, when height, sex, age, and the like are input from the input unit 150, the weight is measured by the scale 110 (step S2). The CPU 170 temporarily stores data indicating the weight measurement result value in the second storage unit 130.

  After step S2, the CPU 170 executes a bioelectrical impedance measurement process (step S3) for the middle trunk, and subsequently executes a metabolic change information generation process and a diet guidance information generation process (step S4). Metabolic change information generation processing and diet induction information generation processing generate weight change information indicating a change in weight and bioelectric impedance change information indicating a change in bioelectric impedance in the middle of the trunk, and a metabolic change indicating a change in metabolism. Information is generated, and guidance information for safely dieting the measurement subject is generated using the metabolic change information. And CPU170 displays the produced | generated guidance information on the display part 160 (step S5). Details of bioelectrical impedance measurement processing (step S3), change information generation processing, diet guidance information generation processing (step S4), and display processing (step S5) in the middle trunk will be described later.

  In order to obtain a stable measurement result of bioelectrical impedance in the middle of the trunk, after defecation, 2 hours after breakfast, before lunch, body temperature, blood pressure, timing with less daily fluctuations in blood flow, and other conditions were satisfied It is desirable to measure at timing. FIG. 8 shows an example of the useful measurement timing period. FIG. 8 is a graph with the bioelectrical impedance Ztm in the middle trunk as the vertical axis and the measurement time as the horizontal axis, and the living body in the middle trunk from 6 am to 6 am on the next measurement start day. The situation of daily fluctuation of electrical impedance is shown. As can be understood from FIG. 8, since the measurement value is relatively stable from 10:00 am to noon indicated by the symbol MT, it is suitable as a measurement timing for obtaining a stable measurement result. In the present embodiment, this period is referred to as a “useful measurement timing period”. The biometric apparatus 1 according to the present embodiment displays a message for requesting the subject to confirm whether defecation and urination have been completed or during a useful measurement timing period before the bioelectrical impedance measurement processing of the middle trunk. 160.

FIG. 9 is a flowchart showing a detailed flow of bioelectrical impedance measurement processing in the middle of the trunk.
As shown in FIG. 9, first, in step S <b> 21, based on an instruction from the input unit 150, the CPU 170 performs initial settings such as the number of various memory counters of measurement data of the bioelectrical impedance Ztm in the middle trunk.

  Subsequently, in step S22, the CPU 170 determines whether it is a measurement timing. If the measurement timing is determined (step S22: YES), in step S23, the CPU 170 sets the placement of the bioelectrical impedance electrode in the middle of the trunk, and the electrode set in step S24. Processing for measuring the bioelectrical impedance Ztm in the middle of the trunk is performed. As the electrode arrangement, the CPU 170 selects one of the electrode arrangements described with reference to FIG. The electrodes are switched by electrode switching circuits 251 and 252. The electrode switching circuits 251 and 252 are controlled by the CPU 170. The electrode switching circuit 252 selects two current electrodes corresponding to the selected electrode arrangement among the current electrodes X1 to X4. The electrode switching circuit 251 selects two voltage electrodes corresponding to the selected electrode arrangement among the voltage electrodes Y1 to Y4.

  For example, when the electrode arrangement shown in FIG. 4A is selected, the electrode switching circuit 252 is controlled so as to select the current electrode X3 for the left hand and the current electrode X1 for the left foot, and the voltage electrode Y4 for the right hand. The electrode switching circuit 251 is controlled so as to select the voltage electrode Y2 for the right foot. The CPU 170 outputs current data Di indicating the magnitude of the reference current Iref flowing between the left hand and the left foot, and voltage data Dv indicating the potential difference between the right foot voltage electrode Y2 and the right hand voltage electrode Y4. Then, the bioelectric impedance Ztm in the middle of the trunk is measured. Here, the measured value of the bioelectrical impedance at the nth (n ≧ 1) sampling timing is expressed as Ztm (n).

On the other hand, if it is determined in step S22 that the measurement timing is not reached (step S22: NO), the CPU 170 performs a data smoothing process (moving average process or the like) of the measured bioelectric impedance (Ztm (n)) in step S25. )I do.
The bioelectrical impedance Ztm in the middle of the trunk necessary for estimating the visceral adipose tissue amount varies greatly due to respiration. Since air has a large resistance, when the bioelectrical impedance of the middle trunk is measured at the timing when the measurement subject inhales, the measured value becomes higher than the measurement in the state of exhaling. The processes in steps S25 to S29 are for removing the influence of respiration and obtaining more reliable bioelectrical impedance information of the middle trunk.

In the smoothing process, the CPU 170 performs a moving average process using a plurality of measured values of bioelectrical impedance measured at a predetermined sampling period. For example, smoothing processing is performed using k bioelectrical impedances Ztm (n), Ztm (n-1), Ztm (n-2), ... Ztm (n-k + 1) at the nth sampling timing. The calculation of the bioelectrical impedance Ztm_Ave (n) is given by the following equation.
Ztm_Ave (n) = (Ztm (n) + Ztm (n-1) + Ztm (n-2)... + Ztm (n-k + 1)) / k
Then, the moving average processing result is adopted as the measured value Ztm_Ave (n) of the bioelectrical impedance of the middle trunk at the nth sampling timing.
Next, in step S26, the CPU 170 performs a breathing fluctuation correction process.

  FIG. 10 is a flowchart showing a detailed flow of the breathing fluctuation correction process. In this process, the CPU 170 detects the periodicity of respiration and detects the maximum value and the minimum value for each cycle. Specifically, in step S261, an inflection point detection process is performed from the time-series data after the smoothing process in step S25 (FIG. 9). The time-series data includes a plurality of measured values Ztm_Ave of the bioelectrical impedance of the middle trunk after the smoothing process. Subsequently, in step S262, the CPU 170 determines whether or not each measured value Ztm_Ave of the bioelectrical impedance of the middle trunk after the smoothing process is an inflection point. This is performed by detecting data of the polarity change positions of the front and rear differential coefficients or difference values. When it is determined in step S262 that the point is an inflection point (step S262: YES), the process proceeds to step S263, where it is determined whether the maximum value is reached. This is a step of distributing the maximum value and the minimum value.

  If it is not the maximum value (step S263: NO), the minimum value determination data moving averaging process is performed in step S264. On the other hand, when the maximum value is determined in step S263 (step S263: YES), the maximum value determination data moving averaging process is performed in step S265.

Subsequently, in step S266, it is determined whether or not the maximum value data and the minimum value data for one respiratory cycle have been secured. If it is determined in step S266 that the maximum value data and the minimum value data have been secured (step S266: YES), in step S267, the respiratory fluctuation median value calculation process (average value of the maximum value data and the minimum value data) Operation).
When the process of step S267 ends, the routine returns to FIG. 9 and proceeds to step S27.
When it is determined in step S262 that the point is not an inflection point (step S262: NO), the routine returns to FIG. Also, if it is determined in step S266 that the maximum value and minimum value data for one respiratory cycle are not secured (step S266: NO), the routine returns to FIG.

When the breathing variation correction process (step S26 in FIG. 9) ends, the CPU 170 performs a time series stability confirmation process for the measured impedance in step S27. This is performed by determining whether each value after the breathing fluctuation correction process in step S26 has converged to a value within a predetermined fluctuation a predetermined number of times. In step S28, the CPU 170 determines whether or not each of the measured bioelectric impedances Ztm of the middle trunk satisfies the stability condition. In this determination, it is determined whether or not the median respiratory fluctuation for each respiratory cycle is within a predetermined range (stable range) for at least a predetermined number of times. CPU 170 determines that the median respiratory fluctuation has been determined when the stable range is entered. If it is determined in step S28 that the stability condition is not satisfied (step S28: NO), the process returns to step S22 and the same process is repeated.
On the other hand, when it is determined that the stability condition is satisfied (step S28: YES), the process proceeds to step S29, where the determined impedance value of the median respiratory fluctuation is used as the bioelectrical impedance value of the middle trunk, that is, the final stable The condition determination value is temporarily stored in the second storage unit 130 as a measurement result value.

Next, in step S30, the CPU 170 executes abnormal value determination processing due to eating and drinking, bladder retention, and the like.
The bioelectrical impedance Ztm in the middle of the trunk necessary for estimating the visceral adipose tissue amount varies greatly not only due to breathing but also due to eating and drinking and urinary bladder retention. In other words, since moisture easily flows current, the measured value of bioelectrical impedance becomes low when measurement is performed in a state where the amount of moisture in the body is increased by eating or drinking. Therefore, in this embodiment, in order to ensure more reliable bioelectrical impedance information of the middle trunk, abnormal value determination processing is performed by eating and drinking and urinary bladder retention.

FIG. 11 is a flowchart showing a detailed flow of an abnormal value determination process based on eating and drinking and urinary bladder retention.
As shown in FIG. 11, first, in step S <b> 301, the CPU 170 checks whether the bioelectrical impedance Ztm of the middle trunk is within the normal allowable range using the following formula stored in the first storage unit 120.
Mean-3SD ≦ Ztm ≦ Mean + 3SD
Here, Mean is an average value of the measured values of bioelectrical impedance of a predetermined number of trunks, and SD is a standard deviation thereof.

In step S302, the CPU 170 determines whether or not the bioelectrical impedance of the middle trunk is within an allowable range. If it is determined that it is not within the allowable range (step S302: NO), the process proceeds to step S303. In this step, the CPU 170 performs message notification and buzzer notification processing related to the trunk core condition abnormality. Specifically, the CPU 170 controls the display unit 160 so that advice information indicating appropriate advice is read from the first storage unit 120 and displayed. In addition, the audio processing unit 140 is controlled so as to perform notification by a buzzer via the speaker 145. As this advice, for example, there is a message such as “Please perform preparatory processing such as defecation and urination for abnormal trunk condition”. Subsequently, the CPU 170 performs processing for stopping the measurement (step S304).
If the same determination result is obtained after the preparation process, the measurement can be completed using the abnormal value, and the measurement can be stopped.

If it is determined in step S302 that it is within the permissible range (step S302: YES), the CPU 170 performs message notification and buzzer notification processing regarding normal trunk core condition in step S305. Appropriate advice is displayed on the display unit 160 and a buzzer is generated via the speaker 145. As the message, for example, the message “The trunk condition is normal” is displayed. Further, the notification is made with a sound different from the buzzer sound used in step S303.
When the process of step S305 ends, the routine returns to the flow of FIG.

  Next, in step S31 in FIG. 9, the CPU 170 displays a confirmation message on the display unit 160 for requesting the measurement subject or the measurement assistant to specify whether or not the diet start time (reference time) is reached. And when it is designated as a response to the confirmation message that it is the start time of diet (step S31: YES), the measurement result value stored in step S29 and the measurement result of body weight stored in step S2 (FIG. 7) A bioelectrical impedance measurement result value and body weight measurement in the middle of the trunk, together with a reference time flag indicating that each value is a starting measurement value (bioelectrical impedance reference measurement result value, weight reference measurement result value). The result value and the measurement time information indicating the measured date and time are associated and registered in the first storage unit 120 (step S32). If it is not the start time (step S31: NO), the measurement result value stored in step S29 is registered in the first storage unit 120 together with the weight measurement result value and measurement time information stored in step S2 (step S33). . When either step S32 or step S33 ends, the CPU 170 ends the bioelectrical impedance measurement process for the middle trunk and returns to FIG.

  Subsequently, the CPU 170 executes metabolic change information generation processing and diet induction information generation processing (step S4). In the metabolic change information generation process, first, bioelectrical impedance change information indicating a change in bioelectrical impedance in the middle of the trunk during the diet period and weight change information indicating a change in weight during the diet period are generated. Then, a metabolic change is estimated based on the generated bioelectrical impedance change information, and metabolic change information indicating the metabolic change in the diet period is generated. In the diet induction information generation process, induction information for safely dieting the measurement subject is generated based on the generated metabolic change information.

Here, FIG. 13 is a diagram illustrating an example of a metabolic condition monitor screen according to the present embodiment. The metabolic condition monitor screen is a schematic display (indication data Ib (Ib0, Ib1, Ib2, Ib3,. ))) Is displayed, and weight change information and bioelectrical impedance change information are respectively displayed as a line graph Gw and a line graph Gz.
Each line graph Gw and line graph Gz is on a coordinate plane with the change rate (%) of the body weight of the person being measured and the change rate (%) of the bioelectrical impedance in the middle of the trunk as the vertical axis and time as the horizontal axis. expressed. The rate of change in body weight is the measurement of body weight at each measurement time point t1 to tk (k is a positive integer) with respect to the measurement result value (weight reference measurement result value) at the diet start time t0 (reference time point during the diet period). The rate of change of the result value is shown. Similarly, the rate of change of the bioelectrical impedance of the middle trunk is determined based on the measurement result value at the start time t0 (reference measurement result value of the bioelectrical impedance of the middle trunk). The change rate of the measurement result value of electrical impedance is shown.

  The diet period is typically a period from the start to the end of the diet. When the diet is divided into a plurality of steps and performed step by step, one step of the diet may be the diet period, or all or a part of the plurality of steps may be the diet period. Further, during the diet period, an arbitrary measurement time point that is different from the diet start time point may be used as the reference time point, and the reference time point may be regarded as the start time point of the diet period. In other words, the diet period is a period from an arbitrary measurement time point (reference time point) to another measurement time point while the subject is working on the diet. In the present embodiment, the reference time point during the diet period will be described as the diet start time point t0.

FIG. 12 is a flowchart showing a detailed flow of metabolic change information generation processing and diet induction information generation processing.
As shown in FIG. 12, in step S <b> 51, the CPU 170 starts the diet among the measurement result value of the body weight, the measurement result value of the bioelectrical impedance of the middle trunk, and the measurement time information stored as registration data. All registered data from t0 to the current measurement time tk are read.
Next, in step S52, the CPU 170 normalizes the measurement result value of the body weight in each read registration data with the measurement result value (the reference measurement result value of the body weight) at the start time, and calculates the change rate (%) of the body weight. Obtain as information. Similarly, the measurement result value of the bioelectrical impedance of the middle trunk in each registered data is normalized by the measurement result value at the start time (reference measurement result value of the bioelectrical impedance), and the rate of change of the bioelectrical impedance of the middle trunk ( %) As bioelectric impedance change information.
For convenience of explanation, in this embodiment, a value (change rate) normalized with the reference measurement result value is used as the weight change information or the bioelectrical impedance change information. However, instead of the change rate, the reference measurement result value and the arbitrary measurement are used. The difference from the measurement result value at the time point may be weight change information or bioelectrical impedance change information.

  Next, the CPU 170 generates guidance information based on the bioelectrical impedance change information (that is, estimated metabolic change information) generated in step S52. Specifically, the CPU 170 determines whether or not the change characteristic of the bioelectrical impedance of the middle trunk is a positive change. That is, it is determined whether or not the rate of change exceeds 0% (step S53). When the determination result of step S53 is negative (step S53: NO), the CPU 170 further determines whether or not the change characteristic of the bioelectrical impedance of the middle trunk is a negative change. That is, it is determined whether or not the rate of change is smaller than 0% (step S55). If the determination result in step S55 is also negative, it is determined that the metabolism has not changed, and display data indicating that the metabolism has not changed is generated (step S55: NO, step S57).

On the other hand, when the determination result of step S53 is affirmative (step S53: YES), the CPU 170 determines that the metabolism is decreasing and generates display data indicating the decrease in metabolism (step S54). If the determination result of step S55 is affirmative (step S55: YES), the CPU 170 determines that the metabolism is increasing and generates display data indicating an increase in metabolism (step S56).
As described above, the qualitative information on the change in bioelectrical impedance in the middle of the trunk during the diet period clearly reveals the change in metabolism. Therefore, in this embodiment, the acquired bioelectrical impedance change information is regarded as metabolic change information as it is. Specifically, the CPU 170 estimates that the metabolism is increasing when the bioelectrical impedance in the middle of the trunk shows a positive change, and conversely if the negative change shows a metabolism. If it is estimated that there is no change, it is estimated that there is no change in metabolism if there is no change (steps S53 to S57 described above). That is, CPU 170 estimates metabolic change information based on bioelectrical impedance change information.

The determination in step S53 is first executed for the start time t0.
In the example of FIG. 13, since the rate of change at the start time is 0%, both the determination result of step S53 and the determination result of step S55 are negative (step S53: NO, step S55: NO), and the CPU 170 Display data Ib0 indicating that there is no change is generated and stored in the second storage unit 130 (step S57).
Then, CPU170 performs determination of step S53 using the change rate in the following measurement time t1 (step S58: YES-> S53). In the illustrated example, since the rate of change is greater than 0%, the determination result in step S53 is affirmative (step S53: YES), and the CPU 170 generates display data Ib1 indicating that the metabolism has decreased, and stores the second memory. The information is stored in the unit 130 (step S54).

  When any of steps S54, S56, and S57 ends, CPU 170 determines whether or not there is data at the next measurement time (step S58). If there is next data (step S58: YES), the process goes to step S53. Returning, the processing from step S53 to S58 is repeated until the determination result of step S58 becomes negative. In the present embodiment, the process from step S53 to S58 is performed for the change rate of the bioelectrical impedance of each middle trunk from each measurement time t2 to t4, and the display data Ib2, Ib3, Ib4 are respectively generated. 2 is stored in the storage unit 130.

The display data Ib0 to Ib4 are induction information that schematically represents changes in metabolism. That is, at each of the start time t0 and each of the measurement times t1 to t4, the reference line B is set to “± 0” as to whether the metabolism is “increased”, “decreased”, or “no change” compared to the start time t0. (I.e., “no change”) and a bar graph with an arrow. The display data Ib0 to Ib4 are displayed at the positions corresponding to the measurement times t0 to t4 on the coordinate plane with only the time axis matched.
Specifically, as shown in FIG. 13, when metabolism is “no change” (for example, measurement time t4), a rectangular bar (filled) is displayed over the reference line B (display data). Ib4). When the metabolism indicates “decreased” (for example, measurement time points t1, t2, and t3), they are displayed as thick arrows (filled) pointing downward from the reference line B on the coordinate plane (display data Ib1, Ib2 , Ib3). Further, each thick arrow includes one or more bar portions (rectangles), and the degree of change is represented by the number of bar portions. In each arrow, the degree of change increases as the number of bar portions increases. That is, the degree of metabolic reduction is indicated by the number of arrows and bar portions. In the illustrated example, since the number of bar portions in the display data Ib2 is 4, the degree of reduction in metabolism compared to the display data Ib3 having 1 and 2 display data Ib3 having 3 bar portions. Is large.
Similarly, when metabolism indicates “increased”, it is displayed as a thick arrow (filled) pointing upward from the reference line B on the coordinate plane, and the degree of increase in metabolism depends on the number of arrows and bar portions. Indicated.

Here, the guidance information is information for guiding the subject to be dieted safely. As described above, in the initial stage of dieting, a change in weight loss can be successfully recognized due to dietary restrictions and exercise, but generally it reaches a stagnation period in which changes in physique such as weight and waist circumference are stagnant. This is thought to be partly due to a decrease in metabolism due to the effects of hormones, but in a state where metabolism is reduced, blood flow and body temperature are in a reduced state. It can happen that you do harm. In other words, dieting in a state of reduced metabolism can be harmful to the body depending on the manner of dieting. In particular, excessive dietary restriction in a state where metabolism is reduced may cause further reduction in metabolism. On the other hand, even in a state where metabolism is lowered, when muscle mass increases due to exercise, blood flow improves and body temperature rises. In other words, in a state where metabolism is lowered, it can be said that diet by exercise is safer than diet restriction.
Therefore, in the present embodiment, by providing guidance information generated based on metabolic change information to the measurement subject, the measurement subject is guided to be able to tackle the diet in a safer manner. Information useful for safely dieting the subject is called guidance information.
In the following description, for simplicity of explanation, the display data generated in steps S53 to S57 may be referred to as induction information related to metabolism, but the induction information is not limited to induction information related to metabolism. . Rather, the guidance information includes various information useful for safely dieting the subject.

  When the determination result in step S58 is negative (step S58: NO), that is, when the generation processing of the display data Ibk is completed for the registration data at the measurement time tk, the CPU 170 generates the entire display data in step S59. Process.

First, the CPU 170 generates a line graph Gw and a line graph Gz for the rate of change in weight (weight change information) and the rate of change in bioelectrical impedance in the trunk (bioelectrical impedance change information). Specifically, each rate of change in body weight is plotted at a position corresponding to the measurement time information on the time axis and connected by a straight line to generate a line graph Gw. Similarly, each rate of change of bioelectrical impedance in the middle of the trunk is plotted at a position corresponding to the measurement time information on the time axis and connected by a straight line to generate a line graph Gz. The CPU 170 displays each of the display data indicating the generated line graph Gw and the line graph Gz as display data Ig together with display data indicating a coordinate plane with the rate of change (%) as the vertical axis and the time axis (t) as the horizontal axis. Once stored in the second storage unit 130.
The weight change information and the bioelectric impedance change information also function as guidance information depending on the display mode. That is, by displaying the weight change information together with the induction information related to metabolism as the induction information, the measurement subject can compare the change in weight with the change in metabolism. In addition, by displaying bioelectric impedance change information as guidance information together with weight change information and induction information related to metabolism, it is possible to compare the state of bioelectric impedance change in the middle of the trunk.

  Subsequently, the CPU 170 reads from the second storage unit 130 the start time t0 and each measurement time t1, t2, t3,. . . Each display data Ib0, Ib1, Ib2, Ib3,. . . Ibk and display data Ig are read and combined to generate overall display data Ia. Specifically, each display data Ib0, Ib1, Ib2, Ib3,. . . Ibk corresponds to the time t0, t1, t2, t3,. . . Each display data Ib0, Ib2, Ib3,. . . Ibk and display data Ig are synthesized. Next, the CPU 170 returns to the flow of FIG. 7, displays the generated entire display data Ia on the display unit 160 (step S5), and ends the process.

  In the example shown in FIG. 13, a metabolic condition monitor screen showing a monitoring result over one month at a regular measurement interval for each week is displayed. However, the present embodiment is not limited to this, and is irregular. A metabolic condition monitor screen may be generated and displayed for the measurement time point. Moreover, you may make it produce | generate a metabolic condition monitor screen about the measurement interval (for example, 3 weeks, 1 month) different from 1 week.

FIG. 14 shows another example of the metabolic condition monitor screen according to the present embodiment. In the example shown in FIG. 14, a metabolic condition monitor screen showing a half-year monitoring result is displayed for each measurement time point tn0 to tn5 from September 2010 to February 2011.
In the illustrated example, the case where the rate of change of the bioelectrical impedance in the middle of the trunk is lower than 0% at the measurement time tn1 is shown. In this case, the determination result of step S53 in FIG. 12 is negative (step S53: NO), and the determination result of step S55 is affirmative (step S55: YES), so that display data Ibn1 indicating an increase in metabolism is generated. (Step S56).
In the example of FIG. 14, in step S52, display data Ig1 including display data indicating each of the line graph Gw1 and the line graph Gz1 and display data indicating the coordinate plane is generated. In the processing from step S53 to S58, tn0 and each measurement time tn1, tn2, tn3,. . . tnk (k is a positive integer) display data Ibn0, Ibn1, Ibn2, Ibn3,. . . Ibnk (k is a positive integer) is generated, and both are combined into the entire display data Ia1. Specifically, each display data Ibn0, Ibn1, Ibn2, Ibn3,. . . Ibnk has a corresponding time tn0, tn1, tn2, tn3,. . . Each display data Ibn0, Ibn2, Ibn3,. . . Ibnk and display data Ig1 are synthesized.

As described above, the biometric apparatus according to the present embodiment generates bioelectrical impedance change information indicating temporal changes in bioelectrical impedance by measuring the bioelectrical impedance of the middle part of the subject's trunk during the diet period. Then, metabolic change information indicating a change in metabolism is estimated based on the bioelectrical impedance change information. And the guidance information for making a to-be-measured person diet safely based on metabolic change information is produced | generated, and it provides to a to-be-measured person. That is, guidance information for safely dieting the measurement subject can be generated by a simple method based on metabolic change information indicating a change in metabolism due to diet. As a result, the measurement subject can monitor changes in metabolism during the diet period, and can safely diet while taking into account changes in metabolism due to diet.
Moreover, since the biometric apparatus of the present embodiment displays weight change information (line graphs Gw, Gw1) as guidance information together with guidance information related to metabolism (that is, display data Ib), the measurement subject can change the weight. It can be compared with changes in metabolism. During the diet period, there is often a stagnation period in which weight loss stops despite refraining from taking calories. According to the present embodiment, the person to be measured compares the difference between the metabolism and the change characteristic of the body weight in the stagnation period of the body weight, and if the metabolism is lowered, the subject measures the method for raising the metabolism or other appropriate methods. It becomes possible to select.

1-3. Modifications of First Embodiment (1) In FIGS. 13 and 14, both weight change information and bioelectrical impedance change information are displayed as the guidance information, but either display may be omitted. . Furthermore, the display of the graph showing the weight change information and the impedance change information may be omitted, and only the induction information related to metabolism may be displayed. Alternatively, depending on the degree of information requested by the measurement subject, 1) an aspect in which the induction information related to metabolism, weight change information, and bioelectrical impedance change information are displayed, and 2) induction information related to metabolism and impedance change information. It is good also as a structure which can select freely either the aspect to display, 3) the aspect which displays the induction | guidance | derivation information regarding a metabolism, and weight change information, and 4) the aspect which displays only the induction | guidance | derivation information regarding metabolism.

(2) In the present embodiment, the mode of displaying the induction information related to metabolism at all measurement time points from t0 to tk as the induction information related to metabolism has been described. However, only the current (latest) measurement time point tk is described. You may make it produce | generate and display the induction | guidance | derivation information regarding metabolism. FIG. 15 is a diagram illustrating a display example of induction information related to metabolism according to the present modification. As illustrated, the display unit 160 displays only display data Ib1 indicating one bar graph as the guidance information.
In this case, the CPU 170 reads out only the registration data at the start time t0 and the registration data at the current measurement time tk in step S51 (FIG. 12). In step S52, the CPU 170 obtains the rate of change with respect to the start time t0 for the measurement result value of the bioelectrical impedance of the middle trunk at the measurement time tk. Next, the CPU 170 determines whether or not the rate of change of the bioelectrical impedance of the middle trunk exceeds 0% (step S53), and if it exceeds 0% (step S53: YES), it indicates a decrease in metabolism. Display data is generated (step S54). If it is 0% or less (step S53: NO), it is further determined whether or not the rate of change is smaller than 0% (step S55). If the rate of change is smaller than 0% (step S55: YES), Display data indicating an increase in metabolism is generated (step S56). On the other hand, when the rate of change is not smaller than 0% (that is, when the rate of change is 0%; step S55: NO), display data indicating no metabolic change is generated (step S57).
For example, if the current measurement time is “t1” shown in FIG. 13, the rate of change is greater than 0%, so the determination result in step S53 is affirmative (step S53: YES), and a display indicating a decrease in metabolism is displayed. Data Ib1 is generated (step S54). As a result, the display unit 160 displays the display data Ib1 as induction information related to metabolism (FIG. 15).

(3) In the present embodiment and the above-described modified example, the mode in which the induction information related to metabolism is displayed in a bar graph has been described. Alternatively or additionally, the information related to metabolism is expressed by voice via the voice processing unit 140 and the speaker 145. You may make it alert | report notification information. In this case, for example, the type of notification sound may be varied depending on a change in metabolism, or a voice message such as “metabolism is decreasing” may be used.
Further, in the present embodiment and the above-described modified example, the mode of outputting the induction information related to the generated metabolism, the weight change information, and the bioelectrical impedance change information by displaying on the display unit 160 is described, but the present invention is not limited thereto. Instead of or in addition to the above-described mode, it is also possible to print out the induction information relating to the generated metabolism, the weight change information, and the bioelectrical impedance change information from a printing unit (not shown) in the biometric device 1. . Further, the output may be output from an output terminal (not shown) to an external device connected via a connector (not shown), or the biometric apparatus 1 may be wirelessly communicable with an external device. A unit (not shown) may be provided and output to an external device wirelessly.

  (4) In the present embodiment and the above-described modified example, the mode of using the diet start time t0 as the diet reference time has been described. However, any measurement time may be used as the diet reference time. In this case, in step S31 of FIG. 9, instead of displaying on the display unit 160 a confirmation message for requesting the measurement subject or the measurement assistant to specify whether or not the diet is started, whether or not the diet is at the reference time. A confirmation message for requesting such designation may be displayed on the display unit 160. When it is designated that it is the reference time of the diet (step S31: YES), the CPU 170 searches for the reference time flag already stored in the first storage unit 120, and if there is a reference time flag. While resetting this, a reference time flag is newly set for the current measurement result value to generate registration data (step S32).

  (5) In the present embodiment and the above-described modified example, in each of FIGS. 12, 13 and 14, the change rate of the bioelectric impedance Ztm and the change rate of the body weight in the middle of the trunk have been described. Alternatively, the measurement result value of the bioelectrical impedance Ztm and the measurement result value of the body weight in the middle of the trunk may be used. However, when the rate of change is used, the measurement result values of the bioelectrical impedance and body weight in the middle of the trunk are normalized, so that there is an advantage that the degree of change of both can be compared with the same earthwork.

2. Second Embodiment Next, a second embodiment according to the present invention will be described.
In the first embodiment, the induction information related to metabolism is generated based on the metabolic change information. However, in the present embodiment, the induction information related to metabolism and other induction information are calculated based on the metabolic change information and the weight change information. The point of generation is different from the first embodiment.
On the other hand, in the present embodiment, as in the first embodiment, the qualitative information indicated by the bioelectrical impedance change information is regarded as information that directly shows the state of metabolic change. That is, by considering that the bioelectrical impedance change information is the metabolic change information itself, the induction information on metabolism and other induction information based on the comparison analysis result of the change characteristics of the bioelectrical impedance change information and the weight change information. Is generated.

FIG. 16 is a flowchart showing the operation of the biometric apparatus 1 according to the present embodiment.
As shown in FIG. 16, the CPU 170 sequentially executes personal data input (step S1), weight measurement (step S2), and bioelectrical impedance measurement processing (step S3) of the middle trunk, followed by metabolic changes. An information generation process and a diet guidance information generation process (S4a) are executed. The personal data input (step S1), the weight measurement (step S2), and the bioelectrical impedance measurement process (step S3) in the middle trunk are the same as the processes described in the first embodiment. In the following description, descriptions on the same configuration and processing as in the first embodiment will be omitted as appropriate.

  FIG. 17 is a flowchart showing a detailed flow of the metabolic change information generation process and the diet guidance information generation process (step S4a). In the metabolic change information generation process, the CPU 170 generates bioelectric impedance change information indicating a change in bioelectric impedance of the middle trunk during the diet period and weight change information indicating a change in weight during the diet period, and the bioelectric impedance The change information is estimated to be metabolic change information. In the diet induction information generation process, the CPU 170 generates induction information for safely dieting the subject based on the weight change information and the bioelectrical impedance change information estimated to be metabolic change information. FIG. 18 is a diagram for explaining these processes.

In the metabolic change information generation process, first, the CPU 170 reads all registration data from the start time tc0 to the current measurement time tck (step S61 in FIG. 17).
Next, in step S62, the CPU 170 removes the registration data relating to each measurement time point, excluding the registration data relating to the start time point tc0 shown in FIG. 18 (registration data with the reference time point flag) shown in FIG. The weight measurement result value is normalized by the measurement result value (weight reference measurement result value) at the start time point (reference time point) tc0, and the weight change rate (%) is acquired. Similarly, for each registered data related to each measurement time excluding the registration data related to the start time tc0, the measurement result value of the bioelectrical impedance of the middle trunk is measured as the measurement result value (the bioelectrical impedance of the middle trunk). (Standard measurement result value)), and the change rate (%) of bioelectrical impedance in the middle of the trunk is obtained. That is, the change rate of the body weight is the change rate of the measurement result value of the body weight at each measurement time with respect to the reference measurement result value of the body weight, and the change rate of the bioelectric impedance of the middle trunk is the bioelectric impedance of the middle trunk The change rate of the measurement result value of the bioelectrical impedance of the middle trunk at each measurement time with respect to the reference measurement result value.
As in the case of the first embodiment, in this embodiment, for convenience of explanation, the rate of change is used. However, the rate of change is not a normalized value but a difference from the reference measurement value. Weight change information or bioelectrical impedance change information may be generated.

Subsequently, for each of the change rate of the body weight and the change rate of the bioelectrical impedance of the central trunk, the CPU 170, for example, as shown in FIG. Information) and bioelectrical impedance change curve Cz (bioelectrical impedance change information) are generated (step S63).
The CPU 170 temporarily stores display data indicating each change curve in the second storage unit 130.

Subsequently, in step S64, the CPU 170 performs a process of comparing and analyzing the change characteristic of the bioelectrical impedance change information estimated to be metabolic change information and the change characteristic of the weight change information to generate induction information related to metabolism. Do.
The graph shown in FIG. 18 has a change rate of weight or a change rate of bioelectrical impedance in the middle of the trunk as the vertical axis and time as the horizontal axis. The weight change curve Cw generated in step S63 and the bioelectricity are shown in FIG. An impedance change curve Cz is shown.
As shown in FIG. 18, the weight change curve Cw falls after the diet start time tc0, but reaches a plateau P around the time tc1. Generally, this state is called a diet stagnation period (stagnation state). On the other hand, the bioelectrical impedance change curve Cz rises once after starting the diet, and falls after maintaining a high value. Then, the value becomes low near the time tc2, and then remains flat for a while. That is, after the time tc2, it converges and reaches a stable period. Thus, even after the decrease in body weight enters the stagnation period, the change in the bioelectrical impedance Ztm in the middle of the trunk continues and enters the stable period with a delay. In this embodiment, the period from the timing when the body weight enters the stagnation period (time tc1) to the timing when the bioelectrical impedance Ztm of the middle trunk enters the stable period (time tc2) is referred to as a delay period D.

As described in the first embodiment, metabolism is reduced during the diet period due to the influence on hormones. This decrease in metabolism is manifested as an increase in bioelectric impedance Ztm in the middle of the trunk.
In the period up to the middle of the delay period D (near time tcd), the bioelectrical impedance Ztm in the middle of the trunk is in a high level state even when the weight loss stops. In other words, it can be considered that the decrease in body weight has stopped due to a decrease in metabolism. Conversely, the bioelectrical impedance Ztm in the middle of the trunk is decreasing from the middle of the delay period D (near time tcd), but this phenomenon indicates that the reduced metabolism is recovering. Then, it can be said that the metabolism is recovered when the measurement result value of the bioelectrical impedance Ztm in the middle of the trunk stops decreasing (around time tc2).
Therefore, in this embodiment, the CPU 170 detects the first time point (time tc1) and the second time point (time tc2), and the metabolism is reduced at the first time point, and the metabolism is lowered at the second time point. Induction information indicating that the recovery has occurred is generated as induction information related to metabolism.

  Specifically, the guidance information generation process is performed as follows. First, the CPU 170 determines, based on the weight change curve Cw, the time point when the plateau P (stagnation period) at which the change in body weight stagnates after the rate of change in body weight has decreased (that is, after the body has changed toward slimming) is first. Detect as time (time tc1). Specifically, in order to determine whether or not the rate of change in weight tends to decrease, the CPU 170 first has a tangent slope Cwa of the weight change curve Cw equal to or less than a predetermined value (0-p) smaller than zero. It is determined whether or not. Next, the CPU 170 determines that the rate of change in weight tends to decrease when the determination result becomes positive a predetermined number of times in succession. In order to determine whether or not the plateau P has been reached, the CPU 170 detects a time point (time tc1) when the tangential slope Cwa has reached a predetermined range centered at zero (0−p ≦ Cwa <0 + p). . As the tangent slope Cwa, a differential coefficient or an average change rate can be used.

When the first time point is detected, it is further determined at this first time point whether the rate of change of the bioelectrical impedance Ztm in the middle trunk exceeds the first threshold value th1 (th1> 0) of the rate of change. When this determination result is affirmative, information that warns of a decrease in metabolism is generated as induction information related to metabolism. Specifically, advice information a1 “metabolism is decreasing” is read from the first storage unit 120 and temporarily stored in the second storage unit 130.
Next, the CPU 170 detects the second time point. Specifically, the CPU 170 is in a state where the rate of change of the bioelectrical impedance Ztm in the middle of the trunk is below a second threshold th2 (th2> 0, ie, th1>th2> 0) that is lower than the first threshold th1. When the convergence is detected, the time point at which the second threshold value th2 is reached is detected as the second time point, and information indicating that the decrease in metabolism is recovered is generated as induction information related to metabolism. Specifically, the advice information a <b> 2 that “metabolic decline has been recovered” is read from the first storage unit 120 and temporarily stored in the second storage unit 130.
The detection that the rate of change of the bioelectrical impedance Ztm in the middle of the trunk has converged to a state below the second threshold th2 has changed for a predetermined time within a range THr with the second threshold th2 as the upper limit and 0% as the lower limit. This is performed based on whether or not the above is detected. That is, it is performed by detecting that the rate of change of the bioelectrical impedance Ztm in the middle of the trunk has decreased and has fallen below the second threshold th2 for a predetermined time. Alternatively, by detecting that the rate of change of the bioelectrical impedance Ztm in the middle trunk decreases and falls below the second threshold th2, the rate of change in the bioelectrical impedance Ztm in the middle trunk falls below the second threshold th2. It may be detected that it has converged.

Next, the CPU 170 generates other guidance information based on the bioelectrical impedance change information.
FIG. 19 is a diagram illustrating an example of a metabolic reduction monitor screen according to the present embodiment.
As shown in the figure, on the metabolic reduction monitor screen, the weight change curve Cw and bioelectrical impedance change generated in step S63 are plotted on a coordinate plane with the rate of change (%) on the vertical axis and time (t) on the horizontal axis. A curve Cz is displayed. In addition, a bar graph (filled) Czb with a bidirectional arrow indicating the distance between the bioelectrical impedance change curve Cz and the time axis is displayed. The bar graph Czb with a two-way arrow emphasizes the magnitude of the change on the plus side of the bioelectrical impedance change curve Cz, and extends in the plus axis plus direction starting from the time axis where the rate of change is 0%. The length of the bar graph varies depending on the magnitude of the change rate of the bioelectrical impedance of the middle trunk at each time point. That is, the longer the bar graph at a certain time point, the greater the degree of increase in the rate of change of bioelectrical impedance in the middle of the trunk at that time point.
In addition, on the metabolic reduction monitor screen, straight lines L1, L2 parallel to the vertical axis indicating the first time point and the second time point, and parallel to the time axis indicating the respective threshold values (threshold values th1, th2 shown in FIG. 18). Broken lines B1 and B2 and a delay interval D are displayed.
The CPU 170 performs a weight change curve Cw, a bioelectrical impedance change curve Cz, a bar graph Czb with a two-way arrow, broken lines B1 and B2 indicating a first threshold th1 and a second threshold th2, respectively, a first time point (time tc1), and a second Display data indicating the straight lines L1 and L2 indicating the time points (time tc2) and the delay interval D are generated, arranged on the coordinate plane, and temporarily stored in the second storage unit 130 as display data Ig2.

Further, the CPU 170 generates display data Igm1 that displays the advice information a1 in the vicinity where the bioelectrical impedance change curve Cz and the straight line L1 intersect, and the bioelectrical impedance change curve Cz, the straight line L2, and the broken line B1. Display data Igm2 for displaying the advice information a2 is generated, and the display data Igm1 and Igm2 are temporarily stored in the second storage unit 130. The display data Igm1 and Igm2 are induction information related to metabolism.
Similarly to the first embodiment, the bioelectric impedance change curve Cz and the weight change curve Cw function as guidance information depending on the display mode. That is, when displayed together with induction information related to metabolism, the measurement subject can compare with changes in metabolism. Further, the bar graph Czb with a two-way arrow indicates the degree of change in the bioelectrical impedance in the middle of the trunk, and functions as an induction relating to metabolism indicating the degree of change in metabolism. Similarly, the qualitative change shown by the bioelectrical impedance change curve Cz clearly shows the change in metabolism during the diet period. Therefore, the bioelectric impedance change curve Cz also functions as induction information regarding metabolism.
Also, the broken lines B1 and B2, the straight lines L1 and L2, and the delay section D also function as guidance information. That is, these display data indicate the beginning and end of the stagnation period in which the change in body weight is stagnant, and indicates the period during which the influence on the diet due to the decrease in metabolism appears. The subject can know that this period is a period for recovering from a state in which metabolism is lowered, and during this period, avoid dieting due to excessive dietary restrictions, and exercise exercise to improve metabolism. It can be taken in.

Next, the CPU 170 combines all the display data Ig2, Igm1, and Igm2 to generate the entire display data Ia2 (step S65). The information displayed on the metabolism lowering monitor screen is not limited to the display data Ig2, Igm1, and Igm2, but plateau P, predetermined range THr (FIG. 18), and other information may be additionally displayed. Any of them can function as guidance information depending on the display mode. Conversely, display of some information may be omitted.
When step S65 ends, the routine returns to FIG.

As described above, in this embodiment, from the difference between the change characteristic of the body weight and the change characteristic of the bioelectrical impedance of the middle trunk, the metabolic stagnation period in the diet period (delay period D) and in the vicinity of the stagnation period Inform the subject of the degree of reduction. In other words, the subject can be informed that the cause of the stagnation of the weight is due to a decrease in metabolism. It is possible to take measures such as refraining from exercising or exercising to improve metabolism. That is, it is possible to assist safe diet progress.
In addition, after the change in body weight has entered the stagnation period, the delay in the stable period of the bioelectrical impedance change in the middle trunk shows a delay interval, and at the end of the delay interval the metabolic Inform the patient that the drop has recovered. Therefore, the measurement subject can know that the decreased metabolism has been recovered.

  When the weight loss enters a stagnation period, the effect of dietary restrictions does not appear, so the diet may be frustrated and the weight may rebound. However, according to the present embodiment, the person to be measured can know that the stagnation of the decrease in body weight is due to a decrease in metabolism, which helps to continue the diet.

  In addition, the measurement of bioelectrical impedance in the middle of the trunk does not require a large-scale device, and any biometric device for home use that can measure the bioelectrical impedance in the middle of the trunk using electrodes for limbs It is also possible to implement using Therefore, according to this embodiment, although it is a simple means, the information regarding the change of a body weight and the change of a metabolism can be provided, and it becomes possible to monitor progress of a safe diet.

Conventionally, the estimated value of the visceral fat amount using the bioelectrical impedance of the middle trunk has been used as useful information indicating whether or not the diet is successful. However, as described above, during the diet period, the amount of water in the skeletal muscle MM and the internal organ VM decreases due to a decrease in metabolism, so that the bioelectrical impedance Zmm of the skeletal muscle and the bioelectrical impedance Zvm of the internal organ increase. (See FIGS. 5 and 6). Conventional estimation of visceral fat is based on the premise that the bioelectrical impedance Zmm of skeletal muscle and the bioelectrical impedance Zvm of internal organs are constant. Based on this premise, during the diet period, the weight loss and the bioelectric impedance Ztm in the middle trunk should proceed in the same way. However, as shown in the delay section of FIG. 18, the bioelectrical impedance in the middle of the trunk continues to change even when the decrease in body weight enters the stagnation period, and reaches a stable period with a delay. That is, there is a time difference between the changes. This is considered to be because the skeletal muscle impedance Zmm and the internal organ bioelectrical impedance Zvm are no longer constant due to a decrease in metabolism due to diet. In other words, the change in the estimated value of visceral fat amount during the diet period no longer shows an accurate change in visceral fat amount, and is not useful information.
Therefore, it is estimated by striving to try to suppress the increase in bioelectrical impedance in the middle of the trunk by sequentially monitoring the decrease in metabolism accompanying the increase in bioelectrical impedance in the middle of the body during the diet period (diet menu correction etc.) The present technology also intends to maintain the reliability of the amount of visceral fat to be used, or to be useful information for maintaining the reliability.

2-1. Modified example of the second embodiment (1) In the above embodiment, the change rates normalized by the reference measurement result value at the reference time point are used as the first threshold value th1 and the second threshold value th2, but the change rate is not a diet. It may be determined according to the bioelectrical impedance of the middle trunk measured at the time of starting. The second threshold th2 is lower than the first threshold th1, and it can be determined that the metabolic state of the measurement subject has recovered when the bioelectrical impedance of the middle trunk falls below the second threshold th2. May be set.
Further, in the above-described embodiment, the aspect of measuring the body weight and the bioelectrical impedance of the middle trunk using the start time point tc0 as the reference time point has been described. Then, the above-described metabolic change information generation processing may be performed assuming that the reset time is the diet reference time. In this case, it is possible to display the relationship between the stagnation period of weight loss repeatedly visited during the diet period and the change in bioelectrical impedance in the middle of the trunk in an easy-to-understand manner.
Metabolism tends to decrease when starting a diet, and once the decreased metabolism recovers during the stagnation period, the state of internal tissues such as the muscle and fat of the subject has changed from the start of the diet. However, the degree does not always coincide with the start of the diet. If further dieting is attempted in this state, this time point may be set as the reference time point.
In this case, in a mode in which the change rate is not used as the first threshold th1 and the second threshold th2, the first threshold th1 and the second threshold th2 may be corrected when the decrease in metabolism is recovered.
In the above embodiment, the CPU 170 detects the first time point using the first threshold value th1 and uses the second threshold value th2 lower than the first threshold value th1 when detecting the second time point. Only two thresholds th2 may be used. That is, a common threshold value may be used for detection of the first time point and the second time point.

  (2) In the above embodiment, the weight change curve Cw, the bioelectrical impedance change curve Cz, the bioelectrical impedance change curve Cz, as well as the bar graph Czb with a bidirectional arrow, and the advice information a1 and the advice information on the metabolic decline monitor screen Although a2 is displayed, it is good also as a mode which displays only advice information a1 and advice information a2.

  (3) In the above embodiment, when the CPU 170 detects the second time point, when the rate of change of the bioelectrical impedance Ztm in the middle trunk converges to a state below the second threshold th2, the second threshold th2 However, instead of using the second threshold th2, instead of using the second threshold value th2, the bioelectrical impedance change curve Cz is almost lowered after the rate of change of the bioelectrical impedance Ztm in the middle of the trunk is reduced. The detected time may be detected as the second time. In this case, the CPU 170 first determines whether or not the slope Cza of the tangent line of the bioelectrical impedance change curve Cz is equal to or smaller than a predetermined value (0-r) smaller than zero. When the determination result becomes positive a predetermined number of times in succession, the CPU 170 determines that the rate of change in weight tends to decrease. Next, the CPU 170 detects a time point at which the tangential slope Cza has reached a predetermined range centered at zero (0−r ≦ Cza <0 + r) as the second time point.

3. Third Embodiment Next, a third embodiment according to the present invention will be described.
As described above, it can be said that the bioelectrical impedance change information indicating the change in the bioelectrical impedance of the middle trunk in the diet period well reveals the qualitative change in metabolism. Therefore, it can be said that the change in the amount of tissue estimated by the bioelectrical impedance in the middle of the trunk during the diet period also clearly reveals a qualitative change in metabolism.
Therefore, in the present embodiment, in order to estimate metabolic change information indicating a change in metabolism based on the tissue amount change information indicating a change in tissue quantity, and to safely diet the subject based on the metabolic change information. The guidance information is generated.
The amount of tissue estimated from the bioelectrical impedance of the middle trunk includes visceral fat mass, organ mass, skeletal muscle mass, and the like. In this embodiment, the visceral fat mass will be described.
In the following description, the same configurations and processes as those in the first and second embodiments are omitted as appropriate.

As in the first and second embodiments, in the processing according to the present embodiment, the CPU 170 first executes personal data input, weight measurement, and bioelectrical impedance Ztm measurement processing in the middle of the trunk in order. . These processes are the same as the personal data input (step S1), body weight measurement (step S2), and bioelectrical impedance measurement process (step S3) in the middle of the trunk in FIGS.
Next, the CPU 170 estimates the visceral fat mass based on the measured bioelectric impedance Ztm of the middle trunk, visceral fat mass change information indicating the estimated visceral fat mass change, and weight change information indicating the change in the body weight. Is generated. Specifically, as in the first and second embodiments, the rate of change in the visceral fat amount at the measurement time after the reference time with respect to the reference measurement value (reference estimated value) of the visceral fat amount at the reference time is calculated. By calculating, visceral fat amount change information is generated. Also, the weight change information is generated by calculating the change rate of the measurement result value at the measurement time after the reference time with respect to the reference measurement result value of the weight at the reference time.

Next, the CPU 170 estimates metabolic change information indicating a change in metabolism based on the visceral fat amount change information. The mode of generating metabolic change information differs depending on the visceral fat mass estimation formula, and is roughly divided into two types.
(1) A 1st aspect is a case where the amount of visceral fat is estimated based on the single regression equation which makes the bioelectrical impedance Ztm of a middle trunk a variable. In this case, qualitative information regarding changes in the bioelectrical impedance Ztm in the middle of the trunk appears as it is in the visceral fat mass change information. That is, metabolic change information indicating a change in metabolism appears as it is in the built-in fat mass change information.
By the way, as shown in FIG. 5 and FIG. 6, the bioelectrical impedance Ztm of the middle trunk is composed of visceral fat FV which is a tissue constituting the middle trunk and lean tissue (skeletal muscle MM and internal organ VM). It can be considered that information is being measured. Further, when the physique of the subject is changing toward the slim during the diet period, the bioelectrical impedance Zfv of the visceral fat is reduced due to the decrease in the visceral fat amount, while the metabolism is lowered due to the diet. In this case, it is considered that the bioelectrical impedance Zvm of internal organs and the bioelectrical impedance Zmm of skeletal muscles increase due to a decrease in blood flow and body temperature. In this case, if the increase in the bioelectric impedance Zvm of the internal organ and the bioelectrical impedance Zmm of the skeletal muscle due to the decrease in metabolism is greater than the decrease in the bioelectrical impedance Zfv of the visceral fat, The impedance Ztm shows a change on the plus side, but if not, it shows a change on the minus side (or no change). That is, at least during the diet period, if the visceral fat amount determined by the single regression equation with the bioelectrical impedance Ztm in the middle of the trunk as a variable is increased, the metabolism is considered to be decreased. be able to.
Therefore, in the first aspect, based on the visceral fat mass change information, it is estimated that the metabolism has decreased when the visceral fat mass change information shows a positive change, and when the visceral fat mass change information shows a negative change, Is estimated to have increased, and if there is no change in visceral fat mass, it is estimated that there was no change in metabolism.

(2) The second aspect is a case where the visceral fat mass is estimated based on the multiple regression equation.
As such an estimation formula, for example, there is the following estimation formula (Japanese Patent Laid-Open No. 2007-105145).
^{Sv = a * W 2 -b *} (1 / Zt) -c * W * Zs-d
However, a, b, c, d are coefficients, W is abdominal circumference, Zt is bioelectrical impedance reflecting fat mass of the entire abdomen (sum of visceral fat mass and subcutaneous fat mass), and Zs reflects subcutaneous fat mass. Bioelectrical impedance.
Also known is a multiple regression equation for obtaining visceral fat mass using body specific information such as body weight, height, and age as explanatory variables together with bioelectrical impedance of the middle trunk or abdomen. As described above, since the abdomen is a part of the trunk, the bioelectrical impedance of the abdomen used in a known estimation formula reflects the bioelectrical impedance Ztm of the trunk. I will take care of it.
In the multiple regression equation, each explanatory variable is weighted with a coefficient obtained from multiple regression analysis. For this reason, depending on the weighting mode, the change in the visceral fat amount indicated by the visceral fat amount change information does not necessarily reflect the change in the bioelectrical impedance Ztm of the trunk abdomen as it is. For example, even when the bioelectrical impedance Ztm in the middle of the trunk is not decreased, it is possible that the visceral fat amount change information indicating a negative change is calculated as long as the body weight and the waist circumference are decreased. Therefore, as in the first aspect, it can be said that it is difficult to derive metabolic change information directly from visceral fat amount change information.
Therefore, in the second aspect, metabolic change information is estimated from the difference in change characteristics between the visceral fat amount change information and the weight change information. Specifically, during the diet period, the visceral fat amount change information and the weight change information are monitored, and the visceral fat amount decreases despite the stagnation period in which the change in the body weight stagnates after the weight is reduced. Then, when it is shown that the change in the visceral fat amount has reached the stagnation period, it is estimated that the metabolism has increased from the state in which the metabolism has decreased (that is, the metabolism has recovered).

  Such estimation is performed for the following reason. If there is no influence from a decrease in metabolism during the diet period, changes in body weight and changes in visceral fat should show similar change characteristics. On the other hand, it is considered that the stagnation period in which weight loss stagnates is caused by a decrease in metabolism. Therefore, it is unlikely that the decrease in the estimated value of the visceral fat amount during the stagnation period of the body weight shows the influence of the decrease in the bioelectric impedance Zfv of the visceral fat. Rather, in the weight loss period immediately before the stagnation period of the body weight, due to the decrease in metabolism, the bioelectric impedance Zvm of the internal organ that acted (ie, increased) in the opposite direction to the decrease in the bioelectrical impedance Zfv of visceral fat. It is considered that the bioelectrical impedance Zmm of the skeletal muscle decreases due to the recovery of metabolism, thereby reducing the bioelectrical impedance Ztm of the middle trunk and manifesting as a decrease in the estimated value of visceral fat. That is, it can be said that the decrease in the estimated value of the visceral fat amount during the stagnation period of the body weight shows the influence by the recovery of the metabolism once decreased rather than the decrease in the visceral fat amount.

When the metabolic change information is estimated based on the visceral fat amount according to the first or second aspect described above, the CPU 170 then induces information to safely cause the subject to diet based on the estimated metabolic change information. Is generated. Specific examples of the guidance information can be generated by appropriately selecting the guidance information described in the first and second embodiments in accordance with the estimated characteristics of metabolic change information.
CPU 170 outputs the generated guidance information to display unit 160 and ends the process.

  As described above, according to the present embodiment, metabolic change information is estimated based on tissue mass change information estimated based on the bioelectrical impedance of the middle trunk, and guidance information is generated based on the metabolic change information. To do. Changes in bioelectrical impedance in the middle of the trunk during the diet period well reveal changes in metabolism. For this reason, it can be said that the change information of the tissue amount estimated from the bioelectrical impedance of the middle trunk in the diet period also clearly shows the change of metabolism. Therefore, it is possible to estimate information on changes in metabolism due to diet by a simple method, and it is possible to monitor the progress of safe diet.

4). Modification Example of First to Third Embodiments Modification Example 1:
In the first to third embodiments, the guidance information is generated using the weight change information indicating the change in the weight, but the present embodiment is not limited to this, and the physique including at least one of the weight and the waist circumference You may use the physique change information which shows a change. Other information indicating the physique includes, for example, BMI (Body Mass Index). When using the abdominal circumference as information indicating the physique, there is a method of inputting the abdominal circumference measured with a measure via the input unit 150. Alternatively, an abdominal circumference measurement unit (not shown) that automatically measures the abdominal circumference with an electronic measure such as three-dimensional laser light measurement may be provided.

Modification 2:
In the said 1st-3rd embodiment, the aspect which performs the respiration variation correction process shown in FIG. 10 was demonstrated as a detailed flow of the respiration variation correction process of FIG.9 S26. Specifically, in the respiration variation correction process shown in FIG. 10, the maximum and minimum data in one respiratory cycle of the measured value of the bioelectrical impedance of the middle trunk is obtained, and the median value of both is obtained. Was value. However, the present invention is not limited to this, and in the respiration variation correction process in step S26 of FIG. 9, the data of the maximum value and the minimum value in one respiratory cycle of the measured value of the bioelectrical impedance of the middle trunk is obtained, Instead of obtaining the median value of both values as the measurement result value, the minimum value (at the time of expiration) in one respiratory cycle of the measurement value of the bioelectrical impedance of the middle trunk may be adopted as the measurement result value. .
The change in the bioelectrical impedance of the middle trunk linked to the respiration is considered to be mainly caused by the change in electrical characteristics due to the insulative air flowing into or out of the lungs due to respiration. That is, when air flows in at the timing of inhaling, the amount of air contained in the lung increases, so that the bioelectrical impedance of the middle trunk increases. Conversely, when exhaling, the amount of air contained in the lungs decreases, so the bioelectrical impedance in the middle of the trunk decreases. Therefore, in this modification, the minimum value is adopted as the measurement result value of the bioelectrical impedance of the middle trunk, thereby removing the influence on the measurement value of the impedance due to the inflow of air due to respiration.

FIG. 20 is a flowchart showing the breathing fluctuation correction process according to this modification.
As shown in FIG. 20, in step S261, the CPU 170 performs an inflection point detection process from time-series data including a plurality of measured values Ztm_Ave of the bioelectrical impedance of the middle trunk after the smoothing process in step S25 (FIG. 9). Subsequently, in step S262, the CPU 170 determines whether or not it is an inflection point. This is performed by detecting data of the polarity change positions of the front and rear differential coefficients or difference values. These steps are the same as the processing in FIG.
If it is determined in step S262 that it is not an inflection point (step S262: NO), the routine returns to the flow of FIG. On the other hand, when it is determined in step S262 that the point is an inflection point (step S262: YES), the process proceeds to step S363, and it is determined whether the value is the minimum value. When this determination result is negative, the determination is repeated until the determination result becomes affirmative (step S363: NO).
On the other hand, if the determination result in step S363 is affirmative (step S363: YES), the CPU 170 adopts the minimum value as the measurement result value of the bioelectrical impedance of the middle trunk (step S364), and the routine is as shown in FIG. Return to flow.
In this case, in the time series stability confirmation process (step S27) of the measured impedance in FIG. 9, it is determined whether or not the minimum value has entered the stable range.

Modification 3:
The method for measuring the bioelectrical impedance Ztm in the middle of the trunk is not limited to the method described in the above embodiment, and the electrode for supplying the reference current Iref and the electrode for detecting the potential difference among the electrodes of both hands and feet. By selecting appropriately, the bioelectrical impedance of each part of the human body such as the hand, foot, or whole body may be measured, and the bioelectrical impedance of the middle trunk may be calculated by adding and subtracting the measurement results. Further, as a substitute for any of the electrodes for the limbs, at least one of a current electrode and a voltage electrode protruding from the trunk (eg, earlobe) may be arranged.

FIG. 21 is a diagram for explaining an arrangement example of current electrodes and voltage electrodes in the case of measuring bioelectrical impedance in the middle of the trunk using clip-type electrodes that are sandwiched between ear lobes. Although not shown, the clip electrode may be pulled out from the main body of the biometric apparatus 1 with a lead wire.
In FIG. 21A, the reference current Iref is supplied between the current electrode X4 for the right hand and the current electrode X2 for the right foot, and a potential difference is generated between the voltage electrode for the left ear and the voltage electrode Y1 for the left foot. measure. In FIG. 21B, the reference current Iref is supplied between the current electrode for the right ear and the current electrode for the right foot X2, and between the voltage electrode for the right hand Y4 and the voltage electrode for the left foot Y1, or the left hand. The potential difference is measured between the voltage electrode Y3 for the left foot and the voltage electrode Y1 for the left foot.

Alternatively, the bioelectrical impedance of the middle trunk may be measured by an induction method in which either the current electrode or the voltage electrode is disposed on the trunk. In this case, for example, a current electrode and a voltage electrode may be provided on the contact surface between the grip electrode and the trunk, using a grip electrode provided at the tip of a lead wire connected to the biometric device 1.
According to this modification, for example, even when the bioelectrical impedance of the middle trunk using the limb electrode cannot be measured due to bedridden or physical inconvenience, the clip electrode used between the earlobe or limbs Measurement can be performed by using a suitable combination of gripping electrodes arranged on the trunk. In addition, since the range of selection of the electrodes is widened, it is possible to perform measurement by subdividing the trunk, which has the advantage of improving the measurement system.

Other variations:
In the first to third embodiments, when measuring the bioelectrical impedance of the middle trunk, a warning display for obtaining a more accurate measurement value is provided to the person to be measured, or a comment regarding the measurement value is shown. You may make it memorize | store comment information with a measured value as registration data.
As described above, it is desirable to measure the bioelectrical impedance in the middle of the trunk within a useful measurement timing period with less diurnal variation. For this reason, for example, when the difference from the previous measurement value is large, it is determined whether or not the measurement is within the useful measurement timing period based on the measurement date and time information. If there is, a comment indicating that may be stored together with the registration data as comment information.

If the change in bioelectrical impedance in the middle of the trunk shows an abnormally lower value than at the start of dieting or resetting (reference time), the presence or absence of defecation and urination should be confirmed before measurement. If there is no urine, re-measurement after defecation and urination may be promoted. Similarly, the presence / absence of drinking / feeding before measurement may be confirmed, and if there is any drinking or feeding, it may be prompted to measure again after a predetermined time has elapsed. Alternatively, instead of performing remeasurement or warning, a comment indicating that the value is abnormally low may be stored as comment information together with the registration data.
In addition, the case where it becomes abnormally low value can be used as a standard when it becomes -0.5% to -1% in terms of the rate of change per day. This standard varies depending on the presence or absence of defecation, drinking or eating, and the physique of the person being measured.
The above-described modified examples (including modified examples 2 and 3) may be used in appropriate combination in order to improve the measurement accuracy of the measurement value of the bioelectrical impedance in the middle of the trunk.

The biometric apparatus according to the above embodiment is an example of a safety diet monitoring apparatus according to the present invention. That is, the safety diet monitoring apparatus according to the present invention includes an apparatus that does not have means for estimating metabolic change information (metabolic change information estimation means), such as the above-described biometric apparatus. That is, metabolic change information generated by an external device may be acquired. If the safety diet monitoring device has metabolic change information estimation means but does not have bioelectrical impedance measurement means for measuring the bioimpedance of the middle trunk, measurement data measured by an external measurement device Metabolic change information may be estimated using
Similarly, when the safety diet monitoring device does not have means for generating tissue amount change information (tissue amount change information generation unit), tissue amount change information generated by an external device may be acquired. In addition, even if it has a tissue amount change information generation means, but does not have a bioelectrical impedance measurement means for measuring the bioimpedance of the middle trunk, the tissue amount is measured using measurement data measured by an external measurement device Change information may be generated.
In any case, the safety diet monitoring device is connected to an external device via a connector (not shown) from an input terminal (not shown), thereby providing metabolic change information, tissue mass change information, or measurement data. Or metabolic change information, tissue mass change information, or measurement data may be acquired via a communication unit (not shown) that can communicate with an external device.
As information indicating metabolism, for example, there are information in which metabolism is estimated by respiratory gas analysis of the measurement subject, and information in which the measurement subject's bioelectric impedance is measured and estimated based on the change.

  In the above-described embodiment, different types of information are normalized and compared with each other using the rate of change of bioelectrical impedance Ztm, the rate of change of body weight, the rate of change of visceral fat mass, etc. However, normalization is not limited to the rate of change. For example, when the units differ between the information to be compared (for example, comparison between visceral fat mass (area) and body weight (volume)), the sensitivity difference of the scale due to the difference in the unit with respect to the measurement result value The information to be compared may be normalized by performing a sensitivity correction process for correcting.

1 Biometric measurement device (safety diet monitoring device)
100 management unit 110 weight scale 120 first storage unit 130 second storage unit 140 voice processing unit (output unit, notification unit)
145 Speaker (output means, notification means)
150 Input section 160 Display section (output means, notification means)
170 CPU (metabolic change information acquisition means, diet induction information generation means, physique change information generation means, bioelectrical impedance change information acquisition means, metabolic change information estimation means, bioelectrical impedance change information generation means, estimated tissue amount change information acquisition means , Tissue mass change information generation means, respiratory fluctuation removal means, determination means)
200 Bioelectrical impedance measurement unit (bioelectrical impedance measurement means, bioelectrical impedance change information acquisition means, estimated tissue amount change information acquisition means)
Ztm Bioelectrical impedance of the trunk

Claims (16)

Metabolic change information acquisition means for acquiring metabolic change information indicating a change in metabolism during the diet period of the measurement subject;
Based on the metabolic change information acquired by the metabolic change information acquisition means, diet induction information generation means for generating induction information for safely dieting the subject,
Output means for outputting the guidance information generated by the diet guidance information generation means;
A safety diet monitoring device characterized by comprising: The metabolic change information acquisition means includes
Bioelectrical impedance change information acquisition means for acquiring bioelectrical impedance change information indicating a change in bioelectrical impedance of the middle trunk of the subject during the diet period;
Metabolic change information estimation means for estimating the metabolic change information in the diet period of the subject based on the bioelectric impedance change information acquired by the bioelectric impedance change information acquisition means;
The safety diet monitoring device according to claim 1, comprising: The bioelectrical impedance change information acquisition means is
A bioelectrical impedance measuring means for measuring the bioelectrical impedance of the middle trunk and outputting it as a measurement result value;
Bioelectrical impedance change information generating means for generating the bioelectrical impedance change information in the diet period of the subject based on the measurement result value of the bioelectrical impedance of the middle trunk measured by the bioelectrical impedance measuring means When,
The safety diet monitoring device according to claim 2, comprising: Physique change information acquisition means for acquiring physique change information indicating a change in physique including at least one of weight and abdominal circumference during the diet period of the subject,
The diet induction information generating means is configured to safely diet the subject based on the metabolic change information acquired by the metabolic change information acquisition means and the physique change information acquired by the physique change information acquisition means. Generate guidance information for
The safety diet monitoring apparatus according to claim 1. The metabolic change information acquisition means includes
Bioelectrical impedance change information acquisition means for acquiring bioelectrical impedance change information indicating a change in bioelectrical impedance of the middle trunk of the subject during the diet period;
Metabolic change information estimation means for estimating the metabolic change information in the diet period of the subject based on the bioelectric impedance change information acquired by the bioelectric impedance change information acquisition means;
The safety diet monitoring device according to claim 4, comprising: The bioelectrical impedance change information acquisition means is
A bioelectrical impedance measuring means for measuring the bioelectrical impedance of the middle trunk and outputting it as a measurement result value;
Bioelectrical impedance change information generating means for generating the bioelectrical impedance change information in the diet period of the subject based on the measurement result value of the bioelectrical impedance of the middle trunk measured by the bioelectrical impedance measuring means When,
The safety diet monitoring device according to claim 5, comprising: The diet guide information generating means includes:
When the physique of the person to be measured changes from the reference time point during the diet period toward the slimming, the stagnation period in which the change in the physique stagnate based on the physique change information acquired by the physique change information acquisition means Detect the start of
Determining whether the bioelectrical impedance change information at the start time exceeds a first threshold;
When the determination condition is affirmed, information that warns of a decrease in metabolism is generated as the guidance information.
The safety diet monitoring apparatus according to claim 5 or 6. The diet induction information generating means, after detecting the start time of the stagnation period, when detecting that the bioelectrical impedance change information has converged to a state below a second threshold value lower than the first threshold value, Generating information indicating that the decrease in metabolism has recovered as the induction information;
The safety diet monitoring apparatus according to claim 7. The diet guide information generating means includes:
Detecting that the bioelectrical impedance change information decreases and falls below the second threshold, or detects that the bioelectrical impedance change information decreases and falls below the second threshold for a predetermined time By detecting that the bioelectrical impedance change information has converged to a state below the second threshold,
The safety diet monitoring apparatus according to claim 8. The bioelectrical impedance change information generating means is configured to change the bioelectrical impedance change based on a bioelectrical impedance of the middle part of the body of the subject measured during a stable period of a stable measurement result value during a day. Generating information,
The safety diet monitoring apparatus according to any one of claims 3 and 6 to 9, wherein The metabolic change information acquisition means includes
Estimated tissue amount change information acquisition means for acquiring tissue amount change information indicating a change in tissue amount estimated by bioelectrical impedance of the middle trunk of the subject during the diet period;
Metabolic change information estimation means for estimating the metabolic change information based on the tissue quantity change information in the diet period acquired by the estimated tissue quantity change information acquisition means;
The safety diet monitoring device according to claim 1, wherein the safety diet monitoring device is provided. The estimated tissue amount change information acquisition means includes:
A bioelectrical impedance measuring means for measuring the bioelectrical impedance of the middle trunk and outputting it as a measurement result value;
A tissue amount change information generating means for generating the tissue amount change information based on the measurement result value of the bioelectric impedance of the middle trunk measured by the bioelectric impedance measuring means;
The safety diet monitoring device according to claim 11, comprising: The estimated tissue amount change information generating unit is configured to determine the tissue amount change information based on bioelectrical impedance of the middle part of the body of the subject measured during a stable period in which a stable measurement result value is obtained in one day. Generate
The safety diet monitoring apparatus according to claim 12. The bioelectrical impedance measuring means has a breathing fluctuation removing means for removing fluctuation due to breathing of the bioelectrical impedance in the middle of the trunk,
The respiratory fluctuation removing means uses, as the measurement result value, a minimum value of time series data of bioelectrical impedance of the plurality of middle trunks in one respiratory cycle,
The safety diet monitoring device according to any one of claims 3, 6 to 10, 12, and 13. The bioelectrical impedance measuring means includes
Determination means for determining whether or not the measurement result value is within an allowable range;
When the determination means determines that the measurement result value is not within an allowable range, notification means for notifying information indicating abnormality of the measurement result value;
The safety diet monitoring device according to any one of claims 3, 6 to 10, and 12 to 14. A metabolic change information acquisition step for acquiring metabolic change information indicating a change in metabolism during the diet period of the subject;
Based on the metabolic change information acquired in the metabolic change information acquisition step, a diet induction information generation step for generating induction information for safely dieting the subject,
An output step of outputting the guidance information generated in the diet guidance information generation step;
A safety diet monitoring method characterized by comprising:

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