JP5924426B2 - Biological information processing device - Google Patents

Description

  The present invention relates to a biological information processing apparatus that processes biological information of a subject.

  2. Description of the Related Art Conventionally, as a biological information processing apparatus for use in exercise management and health management of a subject, a device that is attached to a part of the subject's body and measures the heart rate of the subject is known. Since the heart rate usually coincides with the pulse rate, a pulse meter has been devised that measures the pulse rate instead of the heart rate. As a pulsometer, one using light, one using ultrasonic waves, one using electrocardiogram, and the like are known. In the case of using light, for example, a change in blood flow of a subject wearing the apparatus is detected to calculate the pulse rate of the subject, and the calculated pulse rate (hereinafter referred to as “calculated pulse rate”). Is reported to the subject as a measurement result.

  In addition, when a subject performs aerobic exercise such as walking to maintain and promote health and improve lifestyle, the subject can perform exercise suitable for himself / herself. There is a known technique for supporting exercise. As an example of this exercise support, in Patent Document 1, an appropriate zone for the pulse rate (heart rate) of the subject is set, and it is determined whether or not the calculated pulse rate is within the appropriate zone. A technique for making various notifications to a person is disclosed.

JP 2001-218745 A

  In the technique disclosed in Patent Document 1, the lower limit value and the upper limit value of the appropriate zone for the pulse rate (hereinafter simply referred to as “zone”) are uniformly determined based on the relative exercise intensity. Yes. However, the rate of increase or decrease in pulse rate is greatly influenced by the exercise ability, constitution, etc. of the subject, and is characterized by large individual differences. Therefore, even if the gender and age are the same, the method of Patent Document 1 has a problem in that an appropriate zone setting is not always made for the subject. In particular, since the lower limit value of the zone is the lowest target value that causes the subject to exercise so that the pulse rate is equal to or higher than this value, if the lower limit value is not reached, a notification to that effect is given.

  Subjects with sufficient physical strength and elderly subjects tend to have a difficult pulse rate. Therefore, even if the subject intends to exercise hard, the pulse rate does not rise easily, so the minimum target value may not be reached. In such a case, a notification that the minimum target value has not been reached is given, which may give a sense that half-excessive exercise is forced. On the other hand, a subject who does not have physical strength or a subject who does not exercise normally, a pulse rate increases rapidly only by performing a light exercise, and it may easily reach a target value. In this case, notification is made that the exercise intensity is less than the original target but is appropriate.

  In either case, after all, notifications that encourage exercises that do not meet the original goals such as maintaining and promoting health and improving lifestyle habits are made. Therefore, when exercise is performed with the aid of the device, the original goal is not achieved, and the motivation when the subject exercises constantly is reduced.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to propose a new technique for providing exercise support suitable for a subject.

  A first form for solving the above problems is a pulse rate calculation unit that calculates a pulse rate of a subject, a body motion detection unit that detects a body motion of the subject, and the pulse rate calculation unit. A correlation determination unit for determining a correlation between the pulse rate of the subject and the exercise intensity based on the calculation result of the measurement and the detection result of the body motion detection unit; and the correlation and a given reference exercise intensity And a target value setting unit that sets a target value for the calculated pulse rate calculated by the pulse rate calculating unit.

  Further, as another form, calculating the pulse rate of the subject, detecting the body movement of the subject, based on the calculation result of the pulse rate and the detection result of the body movement, Determining a correlation between the subject's pulse rate and exercise intensity, and setting a target value for the calculated calculated pulse rate based on the correlation and a given reference exercise intensity; A biological information processing method including, may be configured.

  According to this 1st form etc., a subject's pulse rate is calculated and a body motion of a subject is detected. Then, based on the calculation result of the pulse rate and the detection result of the body motion, the correlation between the pulse rate of the subject and the exercise intensity is determined. This correlation is a relationship indicating how the subject's pulse rate and exercise intensity are relatively increasing or decreasing. By determining the correlation based on the subject's actual pulse rate and body movement, and setting the target value for the calculated pulse rate based on the correlation and the given reference exercise intensity, A target value suitable for the person can be set. The target value set in this way enables exercise support suitable for the subject.

  Further, as a second form, the calculation result of the pulse rate calculation part when the correlation determination part in the biological information processing apparatus of the first form continuously causes the subject to perform a predetermined exercise is shown. Using the individual pulse rate calculation unit for calculating the individual pulse rate of the subject, and the detection result of the body motion detection unit when the subject continues to perform the predetermined exercise, An individual exercise intensity calculating unit for calculating the individual exercise intensity of the subject, and constituting the biological information processing apparatus that determines the correlation using the individual pulse rate and the individual exercise intensity. It is good.

  According to the second embodiment, the individual pulse rate of the subject is calculated using the calculation result of the pulse rate calculation unit when the subject continues to perform the predetermined exercise. Further, the individual exercise intensity of the subject is calculated using the detection result of the body motion detection unit when the subject continues to perform the predetermined exercise. The individual pulse rate and the individual exercise intensity are a pulse rate and an exercise intensity specific to the subject. The individual pulse rate and the individual exercise intensity are calculated by causing the subject to continue the predetermined exercise. And a correlation can be optimized for every subject by determining a correlation using these calculation results. Further, the predetermined exercise may be one type of exercise. In this case, since only one type of exercise needs to be performed by the subject, the burden on the subject is reduced.

  Further, as a third mode, the correlation determination unit in the biological information processing apparatus according to the second mode uses the individual pulse rate and the individual exercise intensity to calculate a given reference correlation indicating the correlation criterion. It is good also as comprising the biological information processing apparatus which determines the said correlation by adjusting.

  According to the third embodiment, a correlation suitable for the subject is obtained by a simple method of adjusting a given reference correlation indicating a correlation reference using the individual pulse rate and individual exercise intensity. be able to.

  As a fourth mode, in the biological information processing apparatus according to the second or third mode, the individual pulse rate calculation unit causes the subject to continuously perform a plurality of predetermined exercises with different loads. The individual pulse rate in each is calculated, and the individual exercise intensity calculation unit calculates the individual exercise intensity in each case where the subject continuously performs the plurality of predetermined exercises, and the correlation determination The unit may constitute a biological information processing apparatus that determines the correlation using the individual pulse rate and the individual exercise intensity calculated for each of the plurality of predetermined exercises.

  According to the fourth embodiment, the individual pulse rate in each case where the subject continuously performs a plurality of predetermined exercises with different loads is calculated, and the individual exercise intensity in each of the plurality of predetermined exercises is calculated. By determining the correlation using the individual pulse rate and individual exercise intensity calculated for each of a plurality of predetermined exercises with different loads, it becomes possible to obtain a correlation suitable for the subject with high accuracy. .

  As a fifth aspect, in the biological information processing apparatus according to any one of the first to fourth aspects, the reference exercise intensity is defined by METs (Metabolic equivalents) or oxygen intake, and the target value setting unit is The biological information processing apparatus may be configured to obtain a pulse rate corresponding to the reference exercise intensity from the correlation and set it to the target value.

  According to the fifth aspect, the pulse rate corresponding to the reference exercise intensity is obtained from the correlation determined in any one of the above forms and set to the target value. In this case, by defining the reference exercise intensity with METs or oxygen intake, an appropriate target value can be set in consideration of individual differences in the increase / decrease tendency of the pulse rate. In other words, there are individual differences in the rate of increase or decrease in the pulse rate, but if you set the target value for the pulse rate based on the reference exercise intensity defined by the absolute exercise intensity, perform a certain amount of exercise. Anyone can achieve the goal. Thereby, the motivation with respect to the exercise | movement of the subject who has the characteristic for which a pulse rate cannot raise easily can be improved, for example.

  Further, as a sixth mode, in the biological information processing apparatus according to any one of the first to fifth modes, for each exercise type, based on the correlation and the reference exercise intensity determined for each exercise type. A target value calculation unit that calculates the target value, and a motion type estimation that estimates the motion type performed by the subject by comparing the target value calculated for each motion type with the calculated pulse rate. And the target value setting unit may constitute a biological information processing apparatus that changes the target value based on the exercise type estimated by the exercise type estimation unit.

  According to the sixth aspect, the target value is calculated for each exercise type based on the correlation determined in any one of the above forms and the reference exercise intensity determined for each exercise type. By comparing the calculated pulse rate with the target value calculated for each exercise type, the exercise type performed by the subject can be estimated. And it can be set as the appropriate target value according to the exercise | movement type which the subject is performing by changing a target value based on the estimated exercise | movement type.

  In addition, as a seventh aspect, in the biological information processing apparatus according to any one of the first to sixth aspects, the calculated pulse rate is allowed based on a given upper limit reference exercise intensity defined by relative exercise intensity. It is good also as comprising the living body information processor further provided with the permissible upper limit setting part which sets an upper limit.

  Even if the same exercise is performed, the burden on the subject's body varies depending on the physical strength and age of the subject. Therefore, as in the seventh embodiment, by setting an allowable upper limit value for the calculated pulse rate based on a given upper limit reference exercise intensity defined by relative exercise intensity, an excessive amount is applied to the subject's body. It is possible to prevent the burden and to realize appropriate risk management.

The front view of a pulse meter. (1) Rear view of pulse meter. (2) Pulse meter usage state diagram. The enlarged view when the internal structure of a pulse wave sensor is seen from the side of the case. Explanatory drawing of test walking. (1) Explanatory drawing of the correlation determination method. (2) Explanatory drawing of the zone setting method. The block diagram which shows an example of the function structure of a pulse meter. The table structural example of a minimum reference | standard exercise | movement intensity | strength definition table. The flowchart which shows the flow of an exercise | movement assistance process. The flowchart which shows the flow of an initial calibration process. Explanatory drawing of a test exercise. (1) Explanatory drawing of the correlation determination method in a modification. (2) Explanatory drawing of the zone setting method in a modification. The flowchart which shows the flow of a 2nd exercise assistance process.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. This embodiment is an embodiment in which the biological information processing apparatus of the present invention is applied to a wristwatch-type pulse meter. Needless to say, embodiments to which the present invention is applicable are not limited to the embodiments described below.

1. External Configuration FIG. 1 is a front view of a pulse meter 1 in the present embodiment. The pulsometer 1 includes a wristband 2, and the case 3, the time, the operating state of the pulsometer 1, and various biological information (pulse rate, exercise intensity, calorie consumption, etc.) are displayed by letters, numbers, icons, etc. A liquid crystal display 4 for this purpose is arranged.

  An operation button 5 for operating the pulsometer 1 is disposed on the peripheral portion (side surface) of the case 3. The pulse meter 1 operates using, for example, a built-in secondary battery as a power source. A charging terminal 6 for charging the built-in secondary battery is disposed on the side surface of the case 3 so as to be connected to an external charger.

  FIG. 2 (1) is a rear view of the pulsometer 1 and shows an external view when the pulsometer 1 is viewed from the back of the case 3. FIG. 2 (2) is a state diagram of use of the pulsometer 1, and shows a side view of the pulsometer 1 in a state of being worn on the wrist WR of the subject.

  A pulse wave sensor 10 that detects a pulse wave of the subject and outputs a pulse wave signal is disposed on the back surface of the case 3. The pulse wave sensor 10 detects a pulse wave at the wrist WR of the subject in contact with the back surface of the case 3. In the present embodiment, the pulse wave sensor 10 is a photoelectric pulse wave sensor and includes a mechanism for optically detecting the pulse wave.

  FIG. 3 is an enlarged view when the internal structure of the pulse wave sensor 10 is viewed from the side surface of the case 3. The pulse wave sensor 10 is installed in a hemispherical storage space having a circular bottom surface formed on the back side of the case 3. A light source 12 such as an LED (Light Emitting Diode) and a light receiving element 13 such as a phototransistor are built in the storage space. The inner surface of the hemisphere is a reflecting surface 11 that is a mirror surface, and the light receiving element 13 and the light source 12 are mounted on the upper surface and the lower surface of the substrate 14, respectively, when the bottom surface side of the hemisphere is downward.

  When the light Le is irradiated by the light source 12 toward the skin SK of the user's wrist WR, the irradiated light Le is reflected by the subcutaneous blood vessel BV and returns to the hemisphere as reflected light Lr. The reflected light Lr is further reflected by the hemispherical reflecting surface 11 and enters the light receiving element 13 from above.

  The intensity of the reflected light Lr from the blood vessel BV changes due to the absorption action of hemoglobin in the blood, reflecting the change in blood flow. The pulse wave sensor 10 blinks the light source 12 at a predetermined cycle at a cycle earlier than the pulsation. The light receiving element 13 outputs a pulse wave signal corresponding to the received light intensity by photoelectric conversion for each lighting opportunity of the light source 12. The pulse wave sensor 10 blinks the light source 12 at a frequency of, for example, 128 Hz.

  As shown in FIG. 2A, the pulsometer 1 includes a body motion sensor 20 for detecting the body motion of the subject. In the present embodiment, the body motion sensor 20 includes an acceleration sensor. As shown in FIG. 1, the acceleration sensor has, for example, the normal direction of the cover glass surface of the case 3 and the Z axis with the display surface side positive, and the vertical direction with the 12 o'clock direction of the watch as positive is the Y axis. This is a triaxial acceleration sensor having the X axis as the left-right direction with the 3 o'clock direction of the watch as positive.

  In a state where the pulsometer 1 is worn, the X axis coincides with the direction from the subject's elbow to the wrist. The body motion sensor 20 detects acceleration in three axes of the X axis, the Y axis, and the Z axis, and outputs the result as a body motion signal. The pulsometer 1 detects a periodic body movement (for example, an arm movement or a vertical movement of the body) of the subject accompanying walking or jogging based on the body movement signal detected by the body movement sensor 20. .

2. Principle The pulsometer 1 calculates the pulse rate of the subject using the pulse wave signal detected by the pulse wave sensor 10. Specifically, a predetermined frequency decomposition process is performed on the pulse wave signal, and a signal intensity value (spectrum value) for each frequency band is extracted. The frequency decomposition process can be a process to which, for example, a fast Fourier transform (FFT) is applied.

  Then, a frequency spectrum corresponding to the pulse wave of the subject is specified from the extracted signal intensity value, and the pulse rate is calculated based on the frequency (or period). The pulsometer 1 calculates the pulse rate at a predetermined time interval (for example, every 1 to 5 seconds). In the present embodiment, the pulse rate of the subject calculated as described above is referred to as “calculated pulse rate”.

  In the present embodiment, an appropriate zone for the pulse rate (hereinafter simply referred to as “zone”) is set as a range for determining that the calculated pulse rate is appropriate. If the calculated pulse rate is in the zone, the calculated pulse rate is determined to be appropriate from the viewpoint of achieving goals such as health maintenance / promotion and lifestyle improvement, and the subject is informed to maintain the current state of exercise. To do. On the other hand, when the calculated pulse rate is out of the zone, it is determined that the calculated pulse rate is inappropriate from the viewpoint of achieving the target, and the subject is notified so as to improve the current exercise state.

  An object of the present embodiment is to realize zone setting suitable for an individual in consideration of individual differences in the increase / decrease tendency of the pulse rate. Since there are individual differences in the rate of increase or decrease in pulse rate, the zone setting cannot be made uniformly, and the lower limit of the zone (hereinafter referred to as the “zone lower limit”) is particularly problematic. This is as described above. Therefore, in the present embodiment, the zone lower limit value is set based on the absolute exercise intensity, thereby realizing zone setting suitable for the subject individual.

2-1. Test walking First, the subject wearing the pulse meter 1 is allowed to continue the test walking for a predetermined test walking period. In the test walking period, the subject's pulse rate calculated based on the detection result of the pulse wave sensor 10 and the exercise intensity of the subject calculated based on the detection result of the body motion sensor 20 are used. Individual data specific to the subject is acquired.

  FIG. 4 is an explanatory diagram of the test walking. In FIG. 4, the horizontal axis indicates time, and the vertical axis indicates the pulse rate. When the subject starts a test walk, the pulse rate of the subject gradually increases. When a certain time elapses, the pulse rate of the subject settles in a substantially constant state (steady state). Since there is an individual difference in the rate of increase of the pulse rate, in order to eliminate the influence due to this individual difference, data on the pulse rate and exercise intensity of the subject in a steady state is acquired. Specifically, the period from the middle to the end of the test walking period is set as the data acquisition period. For example, when the test walking period is “6 minutes”, the period from “3 minutes to 6 minutes” after the middle stage is set as the data acquisition period.

  Then, the individual pulse rate “HRc” of the subject is calculated using the calculated pulse rate data acquired in the data acquisition period. In the present embodiment, the average value of the calculated pulse rates acquired during the data acquisition period is set as the individual pulse rate “HRc”. However, it is possible to use another statistical value as long as it is statistically useful as an individual pulse rate, such as an intermediate value of the calculated pulse rate acquired during the data acquisition period or a mode value. is there.

Further, the individual exercise intensity of the subject is calculated using the detection result of the body motion sensor 20 acquired in the data acquisition period. The exercise intensity is an index value indicating the exercise intensity of the subject. In the present embodiment, the case where the individual oxygen intake “VO ₂ c” is calculated as the individual exercise intensity will be described as an example.

  Usually, measurement of oxygen intake requires a measuring instrument such as a gas analyzer that is attached to a subject and measures oxygen intake. In the present embodiment, a method for obtaining the oxygen intake of a subject without using such a measuring device is exemplified.

  First, based on the detection result of the body motion sensor 20, the pitch (step) of the subject is calculated. The pitch “p” can be calculated by performing a predetermined frequency resolution process on the acceleration signal output from the acceleration sensor and extracting a frequency component corresponding to the pitch of the subject. Details of this calculation method are disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-81745.

但し、“ｈ”は被検者の身長である。 Next, an average pitch “p _ave ” that is an average value of the pitch “p” calculated during the data acquisition period is calculated. Then, the stride “W” of the subject in the data acquisition period is calculated according to the following equation (1), for example.

However, “h” is the height of the subject.

Next, the walking speed “V” of the subject is calculated by using, for example, the following formula (2) using the subject's step width “W” calculated according to the formula (1) and the average pitch “p _ave ” of the subject. ).

Then, using the walking speed “V” of the subject calculated according to the equation (2) and the minimum oxygen intake amount “VO ₂ min” of the subject, for example, the individual oxygen intake amount “ Calculate VO ₂ c ″.

2-2. Correlation determination method Next, the correlation between the pulse rate of the subject and the exercise intensity is determined using the individual data (individual pulse rate and individual oxygen intake) acquired in the test walk. This correlation is a relationship indicating how the subject's pulse rate and exercise intensity tend to increase or decrease relatively. Here, the case where exercise intensity is taken as oxygen intake and the correlation between the subject's pulse rate and oxygen intake is determined is exemplified.

FIG. 5A is an explanatory diagram of a correlation determination method. In FIG. 5 (1), the horizontal axis is the pulse rate “HR”, and the vertical axis is the oxygen intake “VO ₂ ”.

First, a reference correlation equation is set as an example of a given reference correlation indicating a reference for a correlation between a subject's pulse rate and exercise intensity. The reference correlation equation uses the subject's minimum pulse rate “HRmin” and maximum pulse rate “HRmax”, and the subject's minimum oxygen intake “VO ₂ min” and maximum oxygen intake “VO ₂ max”. To set.

Specifically, the point A on the coordinate determined by the minimum pulse rate “HRmin” and the minimum oxygen intake “VO ₂ min”, and the coordinate determined by the maximum pulse rate “HRmax” and the maximum oxygen intake “VO ₂ max”. A line segment AB connecting the point B is obtained, and a correlation equation represented by the line segment AB is set as a reference correlation equation. Thereby, for example, a reference correlation equation (line segment AB) as shown by a thick dotted line in FIG.

  The maximum pulse rate “HRmax” is the maximum pulse rate of the subject, and can be calculated by, for example, “HRmax = 220−the age of the subject”. The minimum pulse rate “HRmin” is the minimum pulse rate of the subject, and for example, a resting pulse rate can be set. A typical adult resting pulse rate is about "60-70". From this range, the resting pulse rate is determined based on the gender, age, etc. of the subject, and is set as the minimum pulse rate “HRmin”.

The maximum oxygen intake “VO ₂ max” and the minimum oxygen intake “VO ₂ min” are the maximum and minimum oxygen intake of the subject, respectively. These values can be calculated according to a predetermined calculation formula using parameter values such as the age, sex, and weight of the subject. Since the arithmetic expression itself is known, the description thereof is omitted here.

The slope of the reference correlation equation is expressed as “a”. At this time, the reference correlation equation is adjusted so as to pass through the point C on the coordinates determined by the individual pulse rate “HRc” and “individual oxygen intake VO ₂ c” without changing the slope “a” of the reference correlation equation. Thereby, for example, an adjusted correlation equation (line segment DE) as shown by a thick solid line in FIG.

The oxygen intake corresponding to the point D is the minimum oxygen intake (hereinafter referred to as “corrected minimum oxygen intake”) “VO ₂ min_mod” corrected by adjusting the reference correlation equation. The oxygen intake corresponding to the point E is the maximum oxygen intake (hereinafter referred to as “corrected maximum oxygen intake”) “VO ₂ max_mod” corrected by adjusting the reference correlation equation.

2-3. Zone Setting Method Next, a zone is set using the adjusted correlation equation obtained by the above procedure. Specifically, by setting the zone lower limit value that is the target value (minimum target value) for the calculated pulse rate and the zone upper limit value that is the allowable upper limit value for the calculated pulse rate, an appropriate range (appropriate range for the calculated pulse rate) Zone).

FIG. 5B is an explanatory diagram of the zone setting method. In FIG. 5 (2), the horizontal axis is the pulse rate “HR”, and the vertical axis is the oxygen intake “VO ₂ ”. Further, the adjustment correlation equation is indicated by a thick solid line, and the set zone is indicated by a rectangular band.

  FIG. 5 (2) illustrates the adjusted correlation equations calculated for three types of subjects, Type A to Type C. A type A subject is a type of subject (for example, an athlete or an elderly person) whose pulse rate is difficult to increase. The type C subject is a type of subject (for example, a metabolic patient) whose pulse rate is likely to increase. Type B subjects are very common adult subjects.

(A) Setting of Zone Lower Limit Value In this embodiment, the zone lower limit value is set based on a given lower limit reference exercise intensity defined by absolute exercise intensity. Absolute exercise intensity is a method of expressing exercise intensity that does not consider individual differences in physical strength, and includes expression of exercise intensity such as METs (Metabolic equivalents) and oxygen intake. In the following description, the lower limit reference exercise intensity is expressed as “γ”. The lower limit reference exercise intensity “γ” can be defined by METs or oxygen intake, but here, the lower limit reference exercise intensity “γ” is defined by METs.

  METs are defined as the amount of energy consumed by exercise as exercise intensity, with the amount of energy at rest of the human being “1”, and the approximate value can be quantified according to the type of exercise. For example, assuming that the subject walks daily to maintain and enhance health, the calculated pulse rate is included in the zone by walking at a slightly faster pace than normal walking. In this case, for example, “γ = 3.5 [METs]” can be defined as the value of METs for fast walking.

  At this time, in the adjustment correlation equation indicated by a thick solid line in FIG. 5B, the pulse rate corresponding to the lower limit reference exercise intensity “γ” is obtained and set to the zone lower limit value “HRdown”.

The zone lower limit “HRdown” is calculated according to the following equation (4).

但し、“ＶＯ₂ｃ”は個別酸素摂取量であり、“ＨＲｃ”は個別脈拍数である。“ａ”は基準相関式の傾き（＝調整相関式の傾き）である。 In Expression (4), “VO ₂ min_mod” is a corrected minimum oxygen intake, and is calculated according to the following Expression (5).

However, “VO ₂ c” is an individual oxygen intake, and “HRc” is an individual pulse rate. “A” is the slope of the reference correlation equation (= the slope of the adjusted correlation equation).

In the formula (4), “VO ₂ s” is the lower limit reference oxygen intake, and is obtained by converting the lower limit reference exercise intensity “γ” defined by METs into the oxygen intake “VO ₂ ”.

Specifically, the lower limit reference oxygen intake “VO ₂ s” is calculated according to the following equation (6).

(B) Setting of Zone Upper Limit Value In the present embodiment, the zone upper limit value is set based on a given upper limit reference exercise intensity defined by relative exercise intensity. The zone upper limit value is an example of an upper limit value (allowable upper limit value) of an allowable calculated pulse rate.

  The relative exercise intensity is expressed as a relative value with respect to a reference value of a certain exercise intensity, for example, what percentage of the maximum pulse rate or the maximum oxygen intake corresponds to the subject's pulse rate or oxygen intake. . In the following description, the upper limit reference exercise intensity is expressed as “λ”. Here, a case where the upper limit reference exercise intensity “λ” is defined by the relative heart rate reserve “% HRR (Heart Rate Reserve)” is exemplified.

  It is appropriate to set the zone upper limit value for the purpose of risk management. The burden on the body of the subject varies depending on the physical strength and age of the subject. Therefore, by setting the zone upper limit value based on the upper limit reference exercise intensity defined by “% HRR”, the pulse rate of the subject is prevented from becoming excessively large. For example, based on “% HRR”, the upper limit reference exercise intensity can be determined as “λ = 0.7 (70%)”.

In this case, the zone upper limit “HRup” can be calculated according to the following equation (7).

  Finally, a range divided by the zone lower limit value “HRdown” and the zone upper limit value “HRup” is set as an appropriate zone for the calculated pulse rate.

  What is characteristic in the present embodiment is that the zone upper limit value is set uniformly without depending on the subject individual, whereas the zone lower limit value is set differently depending on the subject individual. It is. That is, it has a great feature in setting a zone lower limit value (minimum target value) suitable for the individual subject based on the absolute exercise intensity.

  In FIG. 5 (2), the type A subject has a range of HRdown (A) to HRup defined as a zone, and the zone is set wider than the type B and type C subjects. . A type A subject whose pulse rate does not easily rise does not increase in pulse rate by just performing a light exercise. In the method of the present embodiment, the zone lower limit value that is the target value is set low for such a subject.

  On the other hand, the range of HRdown (C) to HRup is determined as a zone for Type C subjects, and the zone is set narrower than Type A and Type B subjects. A type C subject whose pulse rate is likely to rise easily increases the pulse rate simply by performing a light exercise. In this embodiment, the zone lower limit value, which is the target value, is set high for such a subject.

3. Functional Configuration FIG. 6 is a block diagram illustrating an example of a functional configuration of the pulse meter 1. The pulse meter 1 includes a pulse wave sensor 10, a body motion sensor 20, a pulse wave signal amplification circuit unit 30, a pulse wave waveform shaping circuit unit 40, a body motion signal amplification circuit unit 50, and a body motion waveform shaping circuit unit. 60, A / D (Analog / Digital) conversion unit 70, processing unit 100, operation unit 200, display unit 300, notification unit 400, communication unit 500, clock unit 600, and storage unit 700. It is configured with.

  The pulse wave sensor 10 is a sensor that measures the pulse wave of the subject to whom the pulse meter 1 is attached, and is configured to include, for example, a photoelectric pulse wave sensor. The pulse wave sensor 10 detects a volume change caused by the inflow of blood flow into the body tissue as a pulse wave signal and outputs it to the pulse wave signal amplification circuit unit 30.

  The pulse wave signal amplification circuit unit 30 includes an amplification circuit that amplifies the pulse wave signal input from the pulse wave sensor 10 with a predetermined gain. The pulse wave signal amplification circuit unit 30 outputs the amplified pulse wave signal to the pulse wave waveform shaping circuit unit 40 and the A / D conversion unit 70.

  The pulse wave waveform shaping circuit unit 40 is a circuit unit that shapes the pulse wave signal (pulse wave waveform) amplified by the pulse wave signal amplification circuit unit 30, and includes a circuit for removing high-frequency noise components, a clipping circuit, and the like. Configured. The processing unit 100 determines whether or not a pulse wave is detected based on the pulse wave waveform shaped by the pulse wave waveform shaping circuit unit 40.

  The body motion sensor 20 is a sensor for capturing the movement of the subject to whom the pulse meter 1 is attached, and includes an acceleration sensor and the like. The body motion sensor 20 corresponds to a body motion detection unit that detects the body motion of the subject.

  The body motion signal amplification circuit unit 50 includes an amplification circuit that amplifies the body motion signal input from the body motion sensor 20 with a predetermined gain. The body motion signal amplification circuit unit 50 outputs the amplified body motion signal to the body motion waveform shaping circuit unit 60 and the A / D conversion unit 70.

  The body motion waveform shaping circuit unit 60 is a circuit unit that shapes the body motion signal (body motion waveform) amplified by the body motion signal amplification circuit unit 50, and includes a circuit that removes a high frequency noise component, a gravity acceleration component, and the like. A circuit for determining other components, a clipping circuit, and the like are included. The processing unit 100 determines whether or not body motion is detected based on the body motion waveform shaped by the body motion waveform shaping circuit unit 60.

  The A / D conversion unit 70 converts the analog pulse wave signal amplified by the pulse wave signal amplification circuit unit 30 and the analog body motion signal amplified by the body motion signal amplification circuit unit 50 to predetermined amounts, respectively. It is sampled and digitized at sampling time intervals and converted to a digital signal. Then, the converted digital signal is output to the processing unit 100.

  The processing unit 100 is a control device and arithmetic device that comprehensively controls each unit of the pulse meter 1 according to various programs such as a system program stored in the storage unit 700, and is a CPU (Central Processing Unit) or DSP (Digital Signal). And a microprocessor such as a processor.

  The processing unit 100 includes, for example, a pulse rate calculation unit 110, a correlation determination unit 120, a zone setting unit 130, a pulse rate suitability determination unit 140, and a notification control unit 150 as functional units. However, these functional units are merely examples, and all the functional units do not necessarily have to be essential constituent requirements.

  The pulse rate calculation unit 110 performs a process of removing a body motion noise component from the pulse wave signal (pulse wave data) using the body motion signal (body motion data) input from the A / D conversion unit 70. Then, the pulse rate of the subject is calculated using the extracted pulsation component (beat data).

  In the initial calibration process, the correlation determination unit 120 correlates the pulse rate of the subject and the exercise intensity according to the above principle based on the calculation result of the pulse rate calculation unit 110 and the detection result of the body motion sensor 20. Determine. Although illustration is omitted, the correlation determination unit 120 calculates the individual pulse rate of the subject using the calculation result of the pulse rate calculation unit 110 when the subject continues to perform the predetermined exercise. It has an individual pulse rate calculator. Moreover, it has the individual exercise | movement intensity | strength calculation part which calculates the individual exercise | movement intensity | strength of a subject using the detection result of the body motion sensor 20 at the time of making a subject perform predetermined exercise | movement continuously.

  In the initial calibration process, the zone setting unit 130 calculates and sets the zone lower limit value and the zone upper limit value according to the above principle, and sets a zone for the calculated pulse rate calculated by the pulse rate calculation unit 110. The zone setting unit 130 corresponds to a target value setting unit that sets a target value for the calculated pulse rate, and an allowable upper limit value setting unit that sets an allowable upper limit value for the calculated pulse rate.

  The pulse rate appropriateness determination unit 140 determines whether the calculated pulse rate calculated by the pulse rate calculation unit 110 is included in the zone set by the zone setting unit 130, thereby determining whether the calculated pulse rate is appropriate or inappropriate. Determine another.

  The notification control unit 150 performs notification control according to whether the calculated pulse rate is appropriate or inappropriate based on the determination result of the pulse rate appropriateness determination unit 140.

  The operation unit 200 is an input device having a button switch or the like, and outputs a signal of a pressed button to the processing unit 100. By operating the operation unit 200, various instructions such as a pulse rate measurement instruction are input. The operation unit 200 corresponds to the operation button 5 in FIG.

  The display unit 300 includes an LCD (Liquid Crystal Display) or the like, and is a display device that performs various displays based on a display signal input from the processing unit 100. Various kinds of biological information (pulse rate, exercise intensity, calorie consumption, etc.) are displayed on the display unit 300. The display unit 300 corresponds to the liquid crystal display 4 in FIG.

  The notification unit 400 includes a speaker, a piezoelectric vibrator, and the like, and is a notification device that performs various notifications based on a notification signal input from the processing unit 100. For example, various notifications are given to the subject by outputting an alarm sound from a speaker or vibrating a piezoelectric vibrator.

  The communication unit 500 is a communication device for transmitting / receiving information used inside the device to / from an external information processing device such as a personal computer (PC) under the control of the processing unit 100. As a communication method of the communication unit 500, a form of wired connection via a cable compliant with a predetermined communication standard, a form of connection via an intermediate device also used as a charger called a cradle, or short-range wireless communication is used. Various systems such as a wireless connection type can be applied.

  The timepiece unit 600 is a time measuring device that measures a time constituted by including a crystal oscillator and a crystal oscillator including an oscillation circuit thereof. The time measured by the clock unit 600 is output to the processing unit 100 as needed.

  The storage unit 700 is configured by a storage device such as a ROM (Read Only Memory), a flash ROM, or a RAM (Random Access Memory). The system program of the pulse meter 1, exercise support function, pulse rate calculation function, exercise intensity measurement function Various programs and data for realizing various functions such as a calorie measurement function are stored. In addition, it has a work area for temporarily storing data being processed and results of various processes.

  The storage unit 700 stores an exercise support program 710 executed as an exercise support process (see FIG. 8) as a program. The exercise support program 710 includes an initial calibration program 711 executed as an initial calibration process (see FIG. 9), a correlation determination program 712 executed as a correlation determination process, and a zone setting program 713 executed as a zone setting process. As a subroutine. These processes will be described later in detail using a flowchart.

  The storage unit 700 stores a lower limit reference exercise intensity definition table 720, individual data 730, and zone setting data 740 as data.

  The lower limit reference exercise intensity definition table 720 is a table in which the lower limit reference exercise intensity is defined, and FIG. 7 shows a table configuration example. In the lower limit reference exercise intensity definition table 720, an exercise type 721 and a lower limit reference exercise intensity 723 are defined in association with each other.

  In the exercise type 721, a plurality of exercise types with different loads are defined, and a lower limit reference exercise intensity 723 is individually defined for each exercise type 721. For example, “1.5 [METs]” is defined for walking (low speed), whereas “3.5 [METs]” is defined for walking (high speed). Also, “7.0 [METs]” is defined for jogging. The lower limit reference exercise intensity definition table 720 is used for setting the lower limit reference exercise intensity in the exercise support process.

  The individual data 730 is individual data of the subject calculated as a result of the test walking described in the above principle, and includes the individual pulse rate 731 and the individual oxygen intake 732.

  The zone setting data 740 is data related to the zone set by the zone setting process, and includes a zone lower limit value 741 and a zone upper limit value 742.

4). Process Flow FIG. 8 is a flowchart showing the flow of the exercise support process executed in the pulsometer 1 when the exercise support program 710 stored in the storage unit 700 is read out by the processing unit 100.

  First, the processing unit 100 sets personal data of the subject (Step A1). Specifically, a message for instructing input of personal data is displayed on the display unit 300, or voice guidance for instructing input of personal data is output from the notification unit 400. Instruct. The personal data is data such as the age, sex, weight, and height of the subject. Then, the personal data input via the operation unit 200 is stored in the storage unit 700.

  Next, the processing unit 100 sets an exercise type (step A3). Specifically, a list of exercise types is displayed on the display unit 300, and the exercise type scheduled to be performed by the subject is selected. Then, the exercise type selected via the operation unit 200 is stored in the storage unit 700.

  Thereafter, the processing unit 100 refers to the lower limit reference exercise intensity definition table 720 stored in the storage unit 700, and reads and sets the lower limit reference exercise intensity 723 associated with the exercise type 721 set in step A3. (Step A5).

  Next, the processing unit 100 performs an initial calibration process according to the initial calibration program 711 stored in the storage unit 700 (step A7).

FIG. 9 is a flowchart showing the flow of the initial calibration process.
First, the processing unit 100 instructs the subject to start a test walk (step B1). Specifically, for a predetermined test walking period (for example, 6 minutes), a voice guidance that instructs to walk at a normal speed is output to the notification unit 400, and the test walk is performed on the subject. Instruct. In accordance with the test walking instruction, the subject starts the test walking.

  Next, the processing unit 100 determines whether or not it is within the data acquisition period (step B3). When it is determined that it is not within the data acquisition period (step B3; No), the processing unit 100 proceeds to step B7. In addition, when it is determined that the data is within the data acquisition period (step B3; Yes), the processing unit 100 uses the detection result of the pulse wave sensor 10 and the detection result of the body motion sensor 20 to determine the pulse rate of the subject and The pitch is calculated and stored in the storage unit 700 (step B5).

  Next, the processing unit 100 determines whether or not the test walking period has ended (step B7). If it is determined that the test walking period has not ended yet (step B7; No), the processing unit 100 returns to step B3. When it is determined that the test walking period has ended (step B7; Yes), the correlation determination process is performed according to the correlation determination program 712 stored in the storage unit 700.

  First, the correlation determination unit 120 sets a reference correlation equation (step B9). Specifically, the maximum pulse rate and the minimum pulse rate, the maximum oxygen intake amount and the minimum oxygen intake amount are calculated based on the personal data of the subject set in step A1, and the reference correlation equation is calculated according to the above principle. Set.

  Next, the correlation determination unit 120 calculates the individual data 730 using the pulse rate and body motion data acquired during the data acquisition period, and stores the calculated data in the storage unit 700 (step B11). For example, the average value of the calculated pulse rate acquired during the data acquisition period is calculated as the individual pulse rate 731. Further, the pitch of the subject is calculated using the body motion data acquired during the data acquisition period, and the individual oxygen intake 732 is calculated according to the equations (1) to (3).

  Thereafter, the correlation determining unit 120 calculates the adjusted correlation equation by adjusting the reference correlation equation set in Step B9 using the individual data 730 calculated in Step B11 (Step B13). Then, the correlation determination unit 120 ends the correlation determination process.

  Next, the processing unit 100 performs zone setting processing according to the zone setting program 713 stored in the storage unit 700. The zone setting unit 130 calculates the zone lower limit value 741 in accordance with, for example, Expression (4) to Expression (6) based on the adjusted correlation equation calculated in Step B13 and the lower limit reference exercise intensity 723 set in Step A5. Is stored in the storage unit 700 (step B15).

  Further, the zone setting unit 130 calculates the zone upper limit value 742 according to, for example, the equation (7) based on the adjusted correlation equation and the predetermined upper limit reference exercise intensity, and stores the zone upper limit value 742 in the storage unit 700 (step B17). ). Then, the zone setting unit 130 ends the zone setting process. This completes the initial calibration process.

  Returning to the exercise support process of FIG. 8, after performing the initial calibration process, the processing unit 100 issues an exercise start instruction to the subject (step A9). For example, the subject is instructed to start exercise by causing the display unit 300 to display a message instructing the start of exercise or causing the notification unit 400 to output sound. In response to the instruction to start the exercise, the subject starts the exercise.

  Next, the pulse rate calculation unit 110 determines whether or not it is the calculation timing of the pulse rate (step A11). If it is determined that it is not the calculation timing (step A11; No), the process proceeds to step A25. To do. If it is determined that it is the calculation timing (step A11; Yes), the pulse rate is calculated based on the detection result of the pulse wave sensor 10 (step A13).

  Next, the pulse rate suitability determination unit 140 determines whether or not the calculated pulse rate calculated in step A13 is within the zone set in the zone setting process (step A15). When the calculated pulse rate is within the zone (step A15; Yes), the pulse rate appropriateness determination unit 140 determines that the calculated pulse rate is appropriate (step A17).

  In this case, the notification control unit 150 performs notification control for appropriateness determination (step A19). Specifically, for example, the pulse rate is controlled within the zone by controlling the lighting of the LED lamp in blue or by causing the notification unit 400 to output sound guidance that prompts the subject to maintain the current exercise state. Inform the subject that this is the case.

  On the other hand, when it is determined in step A15 that the calculated pulse rate is outside the zone (step A15; No), the pulse rate appropriateness determination unit 140 determines that the calculated pulse rate is inappropriate (step A21).

  In this case, the notification control unit 150 performs notification control for inappropriateness determination (step A23). Specifically, for example, the pulse rate is out of the zone by controlling the lighting of the LED lamp in red or by causing the notification unit 400 to output sound guidance that prompts the subject to improve the current exercise state. Inform the subject that this is the case.

  In this case, if the calculated pulse rate does not reach the zone lower limit value 741, the subject is instructed to increase the pace of exercise. On the other hand, when the calculated pulse rate exceeds the zone upper limit value 742, from the viewpoint of risk avoidance, the subject is instructed to reduce the pace of exercise by, for example, outputting an alarm sound to the notification unit 400. .

  Thereafter, the processing unit 100 determines whether or not to end the processing (step A25). For example, it is determined whether or not an exercise end instruction operation has been performed by the subject via the operation unit 200. If it is determined to continue the process (step A25; No), the process returns to step A11. Moreover, when it determines with complete | finishing a process (step A25; Yes), an exercise | movement assistance process is complete | finished.

5. Operational Effect In the pulse meter 1, the pulse rate of the subject is calculated by the pulse rate calculation unit 110. The body motion of the subject is detected by the body motion sensor 20. Then, based on the calculation result of the pulse rate and the detection result of the body motion, the correlation determination unit 120 determines the correlation between the pulse rate of the subject and the exercise intensity. Then, based on the correlation determined by the correlation determination unit 120 and the given lower limit reference exercise intensity, a zone lower limit value that is a target value for the calculated pulse rate calculated by the pulse rate calculation unit 110 is set in the zone setting unit. 130.

  Based on the subject's actual pulse rate and body motion detection results, determine the correlation between the subject's pulse rate and exercise intensity, and based on the correlation and the given lower reference exercise intensity By setting a zone lower limit value for the calculated pulse rate, a pulse rate target value appropriate for the subject can be determined. In addition, the target value determined in this manner makes it possible to promote exercise with intensity suitable for the individual subject.

  In the present embodiment, as the initial calibration, the individual pulse rate of the subject is calculated using the calculation result of the pulse rate calculation unit 110 when the subject continues to perform the test walk for a predetermined period. Further, the individual oxygen intake amount of the subject is calculated using the detection result of the body motion sensor 20 when the subject continues to perform the test walk for a predetermined period. By determining the correlation using the individual pulse rate and the individual oxygen intake calculated in this manner, the correlation can be optimized for each subject. At this time, by adjusting a given reference correlation equation indicating a correlation criterion using the individual pulse rate and the individual oxygen intake, a correlation suitable for the subject can be obtained by a simple method. it can.

  In the present embodiment, by setting the lower limit reference exercise intensity with METs, it is possible to realize setting of an appropriate zone lower limit value in consideration of individual differences in the increase / decrease tendency of the pulse rate. In other words, it is possible to promote an exercise suitable for the individual subject.

6). Modifications Embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be changed as appropriate without departing from the spirit of the present invention. Hereinafter, modified examples will be described.

6-1. Biological Information Processing Device In the above-described embodiment, a wristwatch type pulsometer has been described as an example of the biological information processing device, but a biological information processing device to which the present invention is applicable is not limited thereto. For example, the present invention can be applied to a finger-mounted pulse meter that is mounted on the fingertip and measures the pulse rate. Further, the detection method of the pulse wave signal is not limited to the detection method using light, and may be a detection method using ultrasonic waves or a detection method using electrocardiogram.

6-2. Body Motion Detection Unit In the above embodiment, the body motion sensor that is the body motion detection unit has been described as including an acceleration sensor. However, the body motion detection unit may include other sensors instead of the acceleration sensor. It is good. For example, the body motion sensor may be configured to include a gyro sensor, and the body motion of the subject may be detected based on the angular velocity detected by the gyro sensor. Of course, it may be configured to have both an acceleration sensor and a gyro sensor, and the body movement of the subject may be detected using the detection results of these sensors together.

6-3. Correlation determination In the above embodiment, the correlation formula is adjusted using individual data when the subject performs one type of predetermined exercise. However, using the individual data obtained when the subject continues to perform a plurality of predetermined exercises with different loads, the correlation between the subject's pulse rate and exercise intensity is determined. Also good.

  FIG. 10 is an explanatory diagram of the test exercise in this case. The way of viewing the figure is the same as in FIG. 4, but shows the time change of the subject's pitch along with the time change of the subject's pulse rate. First, a predetermined test exercise period (for example, 6 minutes) is set, and during this test exercise period, a predetermined exercise with a different load is continuously performed by the subject.

  Specifically, the test exercise period is divided into two periods, a first exercise period and a second exercise period. In the first exercise period, an exercise with a low load (for example, slow walking) is performed, and in the second exercise period, an exercise with a relatively high load (for example, jogging) is performed. And about a 1st exercise period, a 1st data acquisition period is set to the period after the middle stage when a subject's pulse rate becomes a steady state, and the 1st individual data is acquired. In addition, regarding the second exercise period, the second individual data is acquired by setting the second data acquisition period in the period after the middle stage where the pulse rate of the subject is in a steady state.

  For example, the test exercise period is 6 minutes. In this case, for example, the period of the first half 3 minutes is set as the first exercise period, and the period of the second half 3 minutes is set as the second exercise period. Further, the remaining one-minute period of the first exercise period (a period of 2 to 3 minutes after the start of exercise) is set as the first data acquisition period, and the remaining one-minute period of the second exercise period (after the start of the exercise) The period of 5 minutes to 6 minutes) is set as the second data acquisition period.

Then, the first individual data and the second individual data are calculated using the pulse rate and body motion data acquired in the first data acquisition period and the second data acquisition period, respectively. The first individual data is a first individual pulse rate “HRc1” and a first individual oxygen intake “VO ₂ c1”. The second individual data is the second individual pulse rate “HRc2” and the second individual oxygen intake “VO ₂ c2”.

FIG. 11 is an explanatory diagram of a correlation determination method and a zone setting method in a modification. The way of viewing the figure is the same as in FIG. By the point C1 on the coordinates determined by the first individual pulse rate “HRc1” and the first individual oxygen intake “VO ₂ c1”, and by the second individual pulse rate “HRc2” and the second individual oxygen intake “VO ₂ c2” The reference correlation equation is adjusted so as to pass through the point C2 on the fixed coordinates.

  For example, as shown by a one-dot chain line in FIG. 11 (1), a line segment obtained by translating the line segment AB so as to pass through the point C1, and a line segment obtained by translating the line segment AB so as to pass through the point C2. Consider these two line segments. Then, the two line segments are combined so that the points C1 and C2 are connected. Thereby, for example, an adjusted correlation equation having a bent shape as indicated by a thick solid line in FIG. 11A is obtained (F-C1-C2-G).

The zone setting method is the same as in the above embodiment. As shown in FIG. 11 (2), the pulse rate corresponding to the lower limit reference exercise intensity “γ” is obtained from the adjustment correlation equation obtained in FIG. 11 (1), and set to the zone lower limit value “HRdown”. In other words, the lower limit reference exercise intensity "gamma" in terms of lower reference oxygen uptake "VO ₂ s", and the zone lower limit "HRdown" seek pulse rate corresponding to the lower limit reference oxygen uptake "VO ₂ s" .

  According to the zone setting method described above, the reference correlation equation is adjusted using the individual pulse rate and the individual oxygen intake amount when two types of predetermined exercises with different loads are continuously performed. As a result, the correlation can be determined more accurately, and the zone setting suitable for the subject can be realized.

  Note that the exercise types to be performed by the subject need not necessarily be two types, and three or more types of predetermined exercises may be performed. Also in this case, similarly to the above, using the individual pulse rate and individual exercise intensity data (individual data) acquired for each of a plurality of predetermined exercises having different loads, the points on the coordinates corresponding to the individual data are passed. The reference correlation equation may be adjusted.

6-4. Change of reference exercise intensity In the above embodiment, the lower limit reference exercise intensity is fixedly set based on the exercise type selected by the subject. However, it is assumed that the exercise state of the subject changes each time. For example, as a warm-up, it is assumed that the user walks slowly at first, gradually walks at a higher walking pace, and finally starts jogging. In such a situation, the type of exercise performed by the subject changes from time to time, and the overall magnitude of the subject's pulse rate also changes, so it is necessary to change the target value for the calculated pulse rate each time. .

  In this case, although illustration is omitted, the processing unit 100 in FIG. 6 performs, for each exercise type, based on the correlation determined by the correlation determination unit 120 and the lower limit reference exercise intensity determined for each exercise type. A target value calculation unit for calculating a target value for the calculated pulse rate is configured as a functional unit. Moreover, it comprises so that it may have as a function part the exercise type estimation part which estimates the exercise type which the subject is performing by comparing the target value calculated for every exercise type with the calculated pulse rate. Then, the processing unit 100 is configured to execute the second exercise support process shown in FIG. 12 instead of the exercise support process of FIG. 8.

FIG. 12 is a flowchart showing the flow of the second exercise support process. The same steps as those in the exercise support process of FIG.
After setting the personal data of the subject in step A1, the processing unit 100 performs initial setting (step C3). Specifically, a predetermined initial value (for example, γ = 3.5 [METs]) is set as the lower limit reference exercise intensity “γ”. Then, the processing unit 100 performs an initial calibration process using the set lower limit reference exercise intensity “γ” (step A7).

  After performing the initial calibration process, the target value calculation unit of the processing unit 100 performs the target value calculation process (step C8). Specifically, the target value for the calculated pulse rate is calculated by referring to the lower limit reference exercise intensity definition table 720 of FIG. 7 and using the lower limit reference exercise intensity 723 determined for each exercise type 721. That is, the target value for each exercise type is calculated by obtaining the pulse rate corresponding to each of the lower limit reference exercise intensity 723 from the adjustment correlation equation.

  After calculating the pulse rate in step A13, the exercise type estimation unit of the processing unit 100 performs an exercise type estimation process (step C15). Specifically, by comparing the target value calculated for each type of exercise in the target value calculation process of step C8 with the calculated pulse rate calculated in step A13, the type of exercise currently being performed by the subject Is estimated.

  Specifically, for example, the target value calculated for each type of exercise is subtracted from the calculated pulse rate. Then, among the subtraction values obtained for each target value, the target value whose absolute value is the minimum, that is, the target value closest to the calculated pulse rate is selected, and the exercise type corresponding to the target value is The type of exercise that the person is currently performing is estimated.

  As another method, a target value having a positive sign and a minimum absolute value may be selected from the subtraction values obtained as described above. That is, a target value that is smaller than the calculated pulse rate and that is closest to the calculated pulse rate is selected. Then, the exercise type corresponding to the selected target value is estimated as the exercise type currently being performed by the subject.

  Next, the processing unit 100 performs a process for confirming the estimated exercise type (step C17). Specifically, control is performed to notify the subject of the exercise type estimated in step C15, and the subject is made to confirm the exercise type. The subject confirms whether or not the reported exercise type matches the exercise type he / she is currently performing. Then, the confirmation result is notified to the apparatus via the operation unit 200.

  Based on the confirmation operation from the subject, the processing unit 100 determines whether or not the exercise type has changed (step C19). If it is determined that the change has occurred (step C19; Yes), the zone lower limit The value is updated (step C21). That is, the zone lower limit value is updated with the target value corresponding to the changed exercise type. When it is determined that the exercise type has not changed (step C19; No), the process proceeds to step A15.

  According to the second exercise support process, the type of exercise performed by the subject can be estimated by comparing the target value calculated for each type of exercise with the calculated pulse rate. Then, by changing the zone lower limit value based on the estimated exercise type, it can be changed to an appropriate target value according to the exercise type as if following the exercise performed by the subject.

6-5. In the above-described embodiment, the lower limit reference exercise intensity is defined by METs, which is a kind of absolute exercise intensity, but may be defined by other absolute exercise intensity. For example, the lower limit reference exercise intensity may be defined by oxygen intake. In this case, in FIGS. 5 (2) and 11 (2), the pulse rate corresponding to the oxygen intake determined as the lower limit reference exercise intensity is directly obtained from the adjustment correlation equation and set to the zone lower limit value. That's fine.

6-6. Maximum Pulse Rate and Minimum Pulse Rate The method for setting the maximum pulse rate and the minimum pulse rate is not limited to the above embodiment. For example, in addition to calculating the maximum pulse rate according to “maximum pulse rate = 220−subject's age”, let the subject perform an exercise with high load and calculate the pulse rate over a predetermined time, The maximum pulse rate “HRmax” may be obtained from the average value, median value, mode value, and the like.

  In addition, for the minimum pulse rate “HRmin”, the pulse rate is calculated over a predetermined time with the subject at rest, and the minimum pulse rate “HRmin” is calculated from the average value, median value, mode value, etc. You may ask for it. Needless to say, the subject himself / herself may be operated to input a value of the maximum pulse rate “HRmax” or the minimum pulse rate “HRmin”.

  1 pulse meter, 10 pulse wave sensor, 20 body motion sensor, 30 pulse wave signal amplification circuit unit, 40 pulse wave waveform shaping circuit unit, 50 body motion signal amplification circuit unit, 60 body motion waveform shaping circuit unit, 70 A / D Conversion unit, 100 processing unit, 200 operation unit, 300 display unit, 400 notification unit, 500 communication unit, 600 clock unit, 700 storage unit

Claims (14)

A pulse wave sensor,
A storage unit that stores personal data of the subject set by the subject and an exercise type scheduled to be performed by the subject;
A body motion detector for detecting the body motion of the subject;
Calculated by using the detection result of the pulse wave sensor and the body motion detection unit, the personal data, and the exercise type during exercise corresponding to the exercise type performed by the subject in the first period. A zone setting process for setting a zone including a lower limit value of the zone, and when the subject performs an exercise corresponding to the exercise type in a second period after the first period, A processing unit that calculates the pulse rate of the subject based on the measurement result of the pulse wave sensor, and determines whether the calculated pulse rate is within the zone;
A biological information processing apparatus comprising: The processing unit performs the individual pulse rate and the individual exercise from the detection result of the pulse wave sensor and the body motion detection unit during the exercise corresponding to the exercise type performed by the subject in the first period. Calculating the intensity, and calculating the lower limit value of the zone using the individual pulse rate, the individual exercise intensity, the personal data, and the exercise type,
The biological information processing apparatus according to claim 1. The processing unit executes a determination process for determining a correlation between the pulse rate of the subject and the exercise intensity using the individual pulse rate and the individual exercise intensity.
The biological information processing apparatus according to claim 2. The storage unit stores at least information on the age of the subject as the personal data,
The processing unit sets an upper limit value of the zone using at least a maximum pulse wave number and a minimum pulse rate determined based on the age of the subject and a coefficient based on a given upper limit reference exercise intensity, Execute further,
The biological information processing apparatus according to claim 3. It said movement type as the biological information processing apparatus according to any one of the walking configured to be set according to claim 1-4. It said movement type as the biological information processing apparatus according to any one of the traveling configured to be set according to claim 1-5. The biological information processing apparatus according to any one of claims 1 to 6 , wherein when the exercise type is changed, the lower limit value of the zone is updated corresponding to the exercise type after the change. The biological information processing apparatus according to claim 7 , wherein when the exercise type is changed, the upper limit value of the zone is not updated corresponding to the changed exercise type. The body motion detecting unit includes at least one of an acceleration sensor and a gyro sensor, a biological information processing apparatus according to any one of claims 1-8. The biological information processing apparatus according to any one of claims 1 to 9 , wherein the personal data includes at least one information of sex, weight, and height in addition to information on age. The biological information processing apparatus according to any one of claims 1 to 10 , further comprising a notification unit that notifies whether or not the pulse rate is within the zone. The biological information processing apparatus according to claim 11 , wherein the notification unit notifies by at least one of lamp lighting, sound output, and vibration. The biological information processing apparatus according to any one of claims 1 to 12 , wherein the pulse wave sensor detects a pulse wave signal by a detection method using at least one of light, an ultrasonic wave, and an electrocardiogram. The exercise type includes at least walking and running,
The processing unit performs a zone setting process for setting the zone including a lower limit value of the zone corresponding to each of the walking and the running.
The biological information processing apparatus according to any one of claims 1 to 13.

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