JP2001349888A - Burning quantity of body fat measuring apparatus and aerobic exercising device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve accurate estimation of the burning quantity of body fat by overcoming its difficulty under factors which are related intricately to the burning of body fat. SOLUTION: In a measuring apparatus, there are arranged an acetone detection sensor 2 for detecting the concentration of acetone in exhalation and an in forming means for notifying the degree of burning of body fat according to the concentration of acetone detected by the acetone detection sensor. Utilizing the diffusion of the acetone released into blood in the burning process of isolated fatty acids in vivo into the exhalation inside the lungs, direct measurement of the burning quantity of body fat is made possible by measuring the acetone in exhalation. This also enables accurate measurement of the burning quantity of the body fat, even under not only at exercising load but also at conducting diet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the amount of body fat burned for improving diet, improving health by exercising, improving beauty, slimming, and reducing body fat.

[0002]

2. Description of the Related Art Conventionally, devices for measuring body fat include:
A body fat percentage meter using bioelectrical impedance is well known. However, the body fat percentage meter utilizes the property that fat hardly conducts electricity, and measures a change in its electrical resistance by passing a small amount of current through the body to calculate the body fat percentage. Therefore, the measured value varies depending on the time zone and the moisture state of the living body. Therefore, it is effective for long-term management of body fat percentage, but is not suitable for measurement of body fat burning before and after exercise and measurement of daily body fat burning. In addition, as an indirect measure of body fat burning, heart rate during exercise is measured, and from exercise time and exercise intensity,
An apparatus for estimating the amount of body fat burned is described in JP-A-6-176. Further, Japanese Patent Application Laid-Open No. 9-173500 describes a training system that calculates the cumulative value of body fat consumption from exercise load and exercise time.

[0003]

The conventional system for estimating the amount of body fat burned, however, estimates the amount of body fat burned from the heart rate during exercise, the exercise load and the exercise time.
The burning of visceral fat and subcutaneous fat starts increasing after 20 minutes from the start of exercise, and after about 30 minutes has passed, the fat starts to be burned efficiently. In addition, since the amount of sugar in the body increases after eating, the energy used for exercise is mainly carbohydrates,
Before meals, the sugar content is low, fats are used as energy, and before and after meals, and the contents of the meals differ, and the body fat burning efficiency also changes due to body temperature rise due to sweating during exercise. As described above, various factors are intricately intertwined in fat burning, and it has been difficult to accurately estimate the body fat burning amount based only on exercise time, heart rate, and exercise load. Further, according to the conventional method, it is possible to estimate the body fat burning amount only when a load such as exercise is given, and it is not possible to measure the body fat burning effect when diet is restricted.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an apparatus for measuring body fat burning amount according to the present invention, which comprises: an acetone detection sensor for detecting an acetone concentration in exhaled breath; and an acetone concentration sensor detected by the acetone detection sensor. It is equipped with a means of notifying the degree of burning of body fat according to, utilizing the fact that acetone released into the blood in the process of burning free fatty acids in the body is diffused into the lungs by breathing, By measuring acetone, it becomes possible to directly measure body fat burning,
It is possible to accurately measure not only the amount of exercise load but also the amount of body fat burned when the diet is restricted.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, a first aspect of the present invention will be described.
The apparatus for measuring the amount of body fat burned comprises an acetone detection sensor for detecting the acetone concentration in exhaled breath, and a notifying means for notifying the degree of burning of body fat according to the acetone concentration detected by the acetone detection sensor. By measuring the acetone in the body, it is possible to directly measure the amount of body fat burning, and it is possible to accurately measure not only during exercise load but also body fat burning when dietary restriction is performed, as well as body fat burning. By providing the notifying means for notifying the degree of combustion of the body, during exercise, the exercise intensity can be easily managed, and the body fat burning exercise can be performed efficiently.

According to a second aspect of the present invention, there is provided an apparatus for measuring the amount of body fat burned, comprising an acetone detection sensor for detecting an acetone concentration in breath, input means for inputting measurement conditions and the like, and an acetone concentration detected by the acetone detection sensor. Calculating means for calculating the amount of body fat burning from the measurement conditions from the means, and means for informing the amount of body fat burning calculated by the calculating means, by calculating the amount of body fat burning by the calculating means, health promotion, It can manage beauty, slimming, body fat loss, etc.

According to a third aspect of the present invention, there is provided an apparatus for measuring the amount of body fat burned, comprising an acetone detection sensor for detecting an acetone concentration in breath, input means for inputting measurement conditions and the like, and an acetone concentration and an input detected by the acetone detection sensor. Calculating means for calculating the amount of body fat burned from the measurement conditions, recording means for recording the change over time in the amount of body fat burned calculated by the calculation means, and reporting the change over time in the amount of body fat burned recorded by the recording means. The system is provided with the notification means, and comprehensive management of health promotion, beauty, slimming, body fat loss, and the like can be performed based on records of changes in the amount of body fat burned over time and meal contents.

According to the fourth aspect of the present invention, the body fat burning amount measuring device can comprehensively determine the user's diet and the like from the body fat burning amount and the body weight, diet, exercise and the like by the advice means and give advice. I can do it.

[0009] The body fat burning amount measuring apparatus according to claim 5 is provided with a warning means for issuing a warning when the acetone concentration in the breath exceeds a prescribed value and becomes high, so that excessive dietary restriction and It is possible to prevent ketoacidosis due to diet and abnormal balance of body functions.

A sixth aspect of the present invention is an acetone detection sensor comprising a semiconductor sensor, wherein the acetone concentration is detected by a change in electrical resistance caused by the movement of electrons generated by an oxidation reaction between the atmospheric oxygen adsorbed on the surface of the semiconductor sensor and acetone. Can be done.

The acetone detecting sensor according to the present invention is constituted by a quartz oscillator sensor in which an acetone adsorption film is coated on a quartz oscillator, and a change in weight when acetone is adsorbed on the acetone adsorption film coated on the quartz oscillator is detected. The acetone concentration can be detected by detecting the change in the resonance frequency of the vibrator.

The acetone detection sensor according to the present invention comprises a surface acoustic wave sensor in which a surface acoustic wave element is coated with an acetone adsorption film, and the surface elasticity when acetone is adsorbed on the acetone adsorption film coated on the surface acoustic wave element. The acetone concentration can be detected from the change in wave propagation speed.

[0013] The body fat burning amount measuring device according to claim 9 is configured to be attached to an aerobic exercise equipment such as an ergometer, a treadmill, an exercise bike, and the like, and the body fat burning degree and the amount during exercise are reported. The exercise intensity can easily be adjusted to burn fat, and by exercising at an exercise intensity having a fat burning effect, health promotion, beauty, slimming, body fat loss, and the like can be efficiently performed.

[0014]

Embodiments of the present invention will be described below. (Example 1) FIG. 1 is an external view of a body fat burning amount measuring device of Example 1. In FIG. 1, 1 is a main body case of the body fat burning amount measuring device, 2 is an acetone detection sensor provided inside the main body case, and 3 is a plurality of pores in the main body case 1 so that a breath sample comes into contact with the acetone detection sensor 2. The provided exhalation spraying unit, 4 is a display unit for displaying the burning degree of body fat according to the acetone concentration detected by the acetone detection sensor 2 as a notification unit, and 5 is an LED for displaying the burning degree of fat stepwise. Have been.

Next, the operation and operation will be described. FIG. 2 shows a simplified diagram of the relationship between the energy utilization cycle of a living body and acetone. Normally, carbohydrate energy such as carbohydrates orally ingested in meals is used as blood glucose and used as energy in a living body. When blood glucose rises and becomes excessive, insulin hormone acts to excrete excess glucose in urine and is stored as body fat as liver and subcutaneous fat. When blood glucose is insufficient due to dietary restriction or exercise, fat is metabolized, that is, burned in order to use the stored body fat as energy. During the process of fat metabolism, ketone bodies such as acetoacetic acid, hydroxybutyric acid, and acetone are formed in blood, and acetoacetic acid and hydroxybutyric acid are reused in organs other than the liver, and acetone is excreted from expiration through the lungs. As described above, acetone is generated in the body fat burning process and is excreted in exhaled breath. Therefore, by measuring exhaled acetone, it is possible to directly know the burning state of body fat.

The user holds the main body case 1 and blows expiration to the expiration blowing section 3 at a predetermined time such as when getting up, before eating, before going to bed, etc., preferably when waking up or during exercise.
The sample blown to the breath blowing unit 3 is guided to the acetone detection sensor 2 through the pores, and the acetone concentration is detected. The degree of fat burning can be displayed on the display unit 4 using the LED 5 in accordance with the acetone concentration to notify the user.

The reason why the measurement is preferably performed at the time of getting up is that the exhalation at the time of getting up is hardly affected by a meal and the like, and it is a time period in which the effects such as dietary restrictions are likely to appear during the exhalation. The measurement time can be selected according to the user's preference, for example, the measurement is performed to confirm whether the meal intake of the meal has been consumed, or the confirmation that the dinner intake has been consumed before going to bed.

At the time of exercise load, exercise intensity can be set while confirming the degree of fat burning on the display unit 4, so that exercise can be performed efficiently. In addition, it is small and easy to measure simply by blowing, so it can be easily carried during exercise such as walking, cycling, and mountain climbing.

As described above, not only during exercise load, but also fat burning when dietary restriction is performed, it is possible to accurately measure, and by providing display means for displaying the degree of body fat burning, during exercise, Can easily manage exercise intensity and can efficiently perform body fat burning exercise.

In this embodiment, the display unit is used for reporting the degree of fat burning, but the same effect can be obtained by using a voice reporting unit.

(Embodiment 2) FIG. 3 shows an apparatus for measuring the amount of body fat burned in Embodiment 2. The difference between the second embodiment and the first embodiment is that a calculation means for calculating the body fat burning amount from the measurement conditions and the acetone concentration is provided.

In FIG. 3, 6a and 6b are input means for inputting measurement conditions, 7 is calculation means for calculating the fat burning amount from the acetone concentration detected by the acetone detection sensor 2 and the measurement conditions from the input means 6a and 6b, 8 Is a display unit comprising a liquid crystal monitor for displaying the fat burning amount calculated by the calculating means 7. Input means 6a is a measurement time selection button, at the time of getting up →
The measurement time is switched between before meals, before going to bed, and during exercise, and the input means 6b is an exercise time input button.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted.

Next, the operation and operation will be described. Before the measurement, the user selects the measurement time from the time of getting up → before eating → before going to bed → when exercising with the measurement time selection button 6a of the input means,
In the case of exercise, the exercise time is input using the exercise time input button 6b. Exercise time can also be entered after measurement. Thereafter, expiration is blown to the breath blowing unit 3. The sample blown to the breath blowing unit 3 is guided to the acetone detection sensor 2 through the pores, and the acetone concentration is detected. Based on the acetone concentration detected by the acetone detection sensor 2 and the measurement conditions from the input means 6a and 6b, the body fat burning amount is calculated by the calculation means 7 and displayed on the display unit 8 as the notification means.

In this embodiment, the input means is a button and the display unit is a liquid crystal monitor. However, the input means is a pen touch input means consisting of a pen and a pressure sensitive panel, and the pressure sensitive panel is overlaid on the liquid crystal monitor. The same effect can be obtained by a configuration in which data can be input corresponding to a location pressed by a pen.

As described above, by calculating the amount of body fat burned by the calculation means, it is possible to manage health promotion, beauty, slimming, body fat loss, and the like.

(Embodiment 3) FIG. 4 shows a body fat burning amount measuring apparatus of Embodiment 3. The third embodiment differs from the first and second embodiments in that a recording means for recording a change over time in the amount of body fat burned is provided.

In FIG. 4, the input means comprises a pen 10 and a pressure-sensitive panel 11, 12 is a display means in which a liquid crystal monitor 13 and the pressure-sensitive panel 11 are superimposed, 14 is a calendar 14a, weight 14b, meal 14c, exercise 14d, and measurement. An item selection menu consisting of 14 e and a graph 14 f can be input as data corresponding to a position where the liquid crystal monitor 13 is pressed with the pen 10. Reference numeral 15 denotes a recording unit that records a change over time in the body fat burning amount calculated by the calculation unit 7. Example 1
Those having the same reference numerals as those of the second embodiment have the same structure, and the description will be omitted.

Next, the operation will be described. First, when the calendar 14a is pressed and selected from the item selection menu, the calendar is displayed as shown in FIG. Suppose that the date is entered as April 1 and the measurement time is further entered. Next, when the weight 14b is selected from the item selection menu, a weight input screen is displayed as shown in FIG. Similarly, select a meal 14c and exercise 14d from the item selection menu, and
The state of exercise and the like is recorded in the recording means 15. At the time of breath acetone measurement, select measurement 14e from the item selection menu,
The exhalation is sprayed on the exhalation spraying unit 3. The sample blown to the breath blowing unit 3 is guided to the acetone detection sensor 2 through the pores, and the acetone concentration is detected. The body fat burning amount is calculated by the calculation means 7 from the acetone concentration detected by the acetone detection sensor 2 and the measurement conditions, and is recorded in the recording means 15. When the graph 14f is selected from the item selection menu, the change over time of the body fat burning amount is displayed on the display unit 8 as shown in FIG.

In this way, comprehensive management of health promotion, beauty, slimming, body fat loss, etc. can be performed based on the record of changes in the amount of body fat burned over time and the contents of meals.

(Embodiment 4) FIG. 8 shows a body fat burning amount measuring apparatus of Embodiment 4. The fourth embodiment differs from the first to third embodiments in that an advisory unit is provided.

In FIG. 8, reference numeral 16 denotes an advisory means for comprehensively judging the situation of the user's diet and the like from the situation of body fat burning and weight, diet, exercise and the like, and giving advice.

The components having the same reference numerals as those of the first to third embodiments have the same structure, and the description is omitted.

Next, the operation will be described. Recording means 15
From the information of the user's past diet, exercise, weight, fat burning, etc. recorded in the above, the advice means 16 gives advice on the nutritional balance, exercise amount, speed of weight loss, etc.
It can be displayed on the display means 12.

(Embodiment 5) An embodiment 5 will be described.
The fifth embodiment differs from the first to fourth embodiments in that a warning unit is provided. Excessive dietary restrictions and dieting can increase ketone bodies in the blood beyond the processing capacity of the tissue, causing the blood to become acidic and into a coma. In addition, rapid or excessive dieting causes rebound, and disrupts the balance of the body's homeostasis and internal functions, and a moderate dietary restriction, exercise, and a well-balanced diet are necessary for a beautiful and healthy diet. is necessary. However, when actually performing a diet, it is liable to perform an excessively excessive diet that causes slimming.Therefore, a warning means for giving a warning when the acetone concentration in the breath exceeds the specified value and becomes high is exceeded. By preparing, it is possible to prevent ketoacidosis due to excessive dietary restriction and diet, and abnormal balance of internal functions.

(Embodiment 6) FIG. 9 shows a semiconductor sensor of Embodiment 6. In FIG. 9, reference numeral 17 denotes a semiconductor sensor main body, 1
8 is an alumina substrate, 19 is a heater wire for heating the semiconductor sensor 17, 20 is a platinum electrode printed on the alumina substrate 18, and 21 is a surface-modified paste such as tin oxide or zinc oxide. The sensitivity to acetone can be further increased by adding a catalyst such as platinum or palladium to the surface modification paste 21.

Next, the operation will be described. At the time of measurement, the semiconductor sensor 17 is 300 to 40 by the heater wire 19.
Heated to 0 ° C., the electric resistance caused by the transfer of electrons generated by the oxidation reaction between oxygen in the air and acetone adsorbed on the surface modification paste 21 on the surface of the semiconductor sensor is detected by the electrode 20, and the acetone concentration is determined from the change in the electric resistance. Can be detected.

(Embodiment 7) FIGS. 10A and 10B are a side view and a cross-sectional view of a quartz oscillator sensor of Embodiment 7. FIG.

In FIG. 10, reference numeral 22 denotes a cut quartz oscillator, 23 denotes a gold or silver electrode attached to both surfaces of the quartz oscillator 22 by a method such as vacuum deposition, and 24 denotes a quartz oscillator 2.
2 is an acetone adsorption film coated on the surface (on the gold or silver electrode 23).

Next, the operation will be described. Acetone is an acetone adsorbing coating 24 coated on the surface of the quartz oscillator 22.
The crystal unit 2 is adsorbed by the weight of the adsorbed acetone.
Since the weight of the surface of No. 2 changes, the resonance frequency changes. The change in the weight of the film coated on the surface of the crystal unit 22 that vibrates parallel to the plane perpendicular to the thickness direction and the change in the resonance frequency have a relationship represented by the following equation (1). In the case of a resonator having a resonance frequency of 9 MHz (frequency of about 0.5 cm 2), a frequency increase of 400 Hz can be obtained with a weight increase of 1 ug.

ΔF = −2.3 × 10 ⁶ (F ² ΔW / A) (1) F: Resonance frequency (MHz) of the crystal unit ΔF: Change in resonance frequency due to weight change (Hz) ΔW: Film A: Surface area of the membrane (cm ² ) As described above, the weight change when acetone is adsorbed on the acetone adsorption film coated on the quartz oscillator is detected by the resonance frequency change of the quartz oscillator, and acetone is detected. The density can be detected.

Eighth Embodiment FIG. 11 shows a surface acoustic wave sensor according to an eighth embodiment. In FIG. 11, 25 is a piezoelectric crystal, 2
6 is a metal film deposited on the surface of the piezoelectric crystal 25, 27 is an input interdigital electrode provided at one end of the piezoelectric crystal 25, and 28 is provided on the other end of the piezoelectric crystal 25 so as to form a pair with the input interdigital electrode 27. The output interdigital electrode 29 is an acetone-adsorbing coating covering the input interdigital electrode 27 and the output interdigital electrode 28.

Next, the operation will be described. The output interdigital electrode 28 detects the propagation speed of the surface acoustic wave applied from the input interdigital electrode 27 of the surface acoustic wave sensor. Since the energy of the surface acoustic wave is localized in the range of the wavelength level of the wave from the surface, the state of the surface of the piezoelectric crystal 25 strongly affects the propagation of the surface acoustic wave.

When acetone is present, the acetone is adsorbed on the acetone adsorbing film 29 covering the surface of the piezoelectric crystal 25, and the surface state changes. Therefore, the concentration of the biological component in the excrement is detected from the change in the propagation speed of the surface acoustic wave. I can do it.

As described above, the acetone concentration can be detected from the change in the propagation speed of the surface acoustic wave when acetone is adsorbed on the acetone adsorption film coated on the surface acoustic wave element. (Embodiment 9) Embodiment 9 will be described. The body fat burning amount measurement device of the ninth embodiment is configured to be attached to an aerobic exercise equipment such as an ergometer, a treadmill, and an exercise bike.

By displaying the degree and amount of body fat burning during exercise on the aerobic exercise equipment, it is possible to easily adjust the exercise intensity to burn fat, and to continue exercise at an exercise intensity having a fat burning effect. Thus, health promotion, beauty, slimming, body fat loss and the like can be efficiently performed.

[0047]

As described above, the first aspect of the present invention is:
It is possible to accurately measure not only during exercise load but also fat burning when dietary restriction is performed, and by providing a notification means that reports the degree of body fat burning, exercise intensity can be easily increased during exercise. Can be managed,
The body fat burning exercise can be performed efficiently.

According to the second aspect of the present invention, the body fat burning amount is calculated by the calculating means to improve health, beauty, slimming,
Management of body fat loss and the like can be performed.

According to the third aspect of the present invention, it is possible to comprehensively manage health promotion, beauty, slimming, body fat loss, and the like based on records of changes in body fat burning amount with time and meal contents.

According to the fourth aspect of the present invention, it is possible to give advice by comprehensively judging the user's diet and the like from the body fat burning amount and the weight, diet, exercise and the like by the advice means.

The invention of claim 5 can prevent ketoacidosis due to excessive dietary restriction and dieting and abnormal balance of internal functions.

The acetone detection sensor according to claim 6 can detect the acetone concentration by a change in electric resistance due to the movement of electrons generated by an oxidation reaction between oxygen in the atmosphere and acetone adsorbed on the surface of the semiconductor sensor.

According to a seventh aspect of the present invention, the acetone detection sensor detects a change in weight when acetone is adsorbed on the acetone adsorption film coated on the quartz oscillator by a change in resonance frequency of the quartz oscillator.
Acetone concentration can be detected.

The acetone detection sensor according to claim 8 can detect the acetone concentration from the change in the propagation speed of the surface acoustic wave when the acetone is adsorbed on the acetone adsorption film coated on the surface acoustic wave element.

The apparatus for measuring the amount of body fat burning according to the ninth aspect is provided in an aerobic exercise machine and notifies the degree and amount of body fat burning during exercise to adjust the exercise intensity to easily burn fat. By exercising with exercise intensity having a fat burning effect, health promotion, beauty, slimming, body fat loss, etc. can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a body fat burning amount measuring device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a relationship between an energy utilization cycle of a living body and acetone.

FIG. 3 is a configuration diagram of a body fat burning amount measuring device according to a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a body fat burning amount measuring device according to a third embodiment of the present invention.

FIG. 5 is a view of a calendar display screen of the apparatus for measuring the amount of fat consumed in the same body.

FIG. 6 is a diagram of a weight input screen of the body fat burning amount measuring device.

FIG. 7 is a graph display screen diagram of the body fat burning amount measuring device

FIG. 8 is a configuration diagram of a body fat burning amount measuring device according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a semiconductor sensor used in the body fat burning amount measuring device of the present invention.

10A is a side view of a quartz oscillator sensor used in the body fat burning amount measuring device of the present invention. FIG. 10B is a side view of the quartz oscillator sensor.

FIG. 11 is a configuration diagram of a surface acoustic wave sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Acetone detection sensor 3 Exhalation spray part 4 Display part (reporting means) 5 LED 6a, 6b Input means 7 Calculation means 8 Display means 15 Recording means 16 Advice means 17 Semiconductor sensor 22 Quartz crystal 25 Piezoelectric crystal

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G01N 33/64 G01N 33/64 (72) Inventor Takahiro Umeda 1006 Kazuma, Kazuma, Kazuma, Osaka Matsushita Electric Industrial Co., Ltd. In-house (72) Inventor Masao Maki 1006 Kadoma, Kazuma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. F-term (reference) 2G045 AA25 AA40 CB22 DB30 FA01 FA03 FA34 GC30 JA01 JA04

Claims (9)

[Claims] 1. An apparatus for measuring the amount of body fat combustion, comprising: an acetone detection sensor for detecting an acetone concentration in exhaled breath; and means for informing a degree of burning of body fat in accordance with the acetone concentration detected by the acetone detection sensor. 2. An acetone detection sensor for detecting an acetone concentration in breath, an input means for inputting measurement conditions and the like, and a body fat burning amount based on the acetone concentration detected by the acetone detection sensor and the measurement conditions from the input means. And a body fat burning amount measuring device comprising: a body fat burning amount calculating unit that calculates the body fat burning amount calculated by the calculating unit. 3. An acetone detection sensor for detecting an acetone concentration in exhaled breath, input means for inputting measurement conditions and conditions such as weight, diet, exercise, etc., and an acetone concentration detected by the acetone detection sensor and an input from the input means. Calculating means for calculating the amount of body fat burned from the measurement conditions; recording means for recording the time-dependent change in the amount of fat burning calculated by the calculating means and weight, diet, exercise and the like; and body fat recorded by the recording means An apparatus for measuring the amount of body fat combustion provided with a means for informing a change in the amount of combustion over time. 4. The body fat burning amount measuring device according to claim 3, further comprising an advisory means for giving advice based on the fat burning amount and the weight, diet, exercise and the like. 5. The body fat burning amount measuring device according to claim 1, further comprising a warning unit that issues a warning when the acetone concentration in the breath exceeds a prescribed value and becomes high. 6. The body fat burning amount measuring device according to claim 1, wherein the acetone detection sensor is a semiconductor sensor. 7. The body fat burning amount measuring device according to claim 1, wherein the acetone detection sensor is a quartz oscillator sensor in which an acetone adsorption film is coated on a quartz oscillator. 8. The body fat burning amount measuring device according to claim 1, wherein the acetone detection sensor is a surface acoustic wave sensor in which a surface acoustic wave element is coated with an acetone adsorption film. 9. An aerobic exercise machine, such as an ergometer, a treadmill, and an exercise bike, provided with the body fat burning amount measuring device according to claim 1.