JP2000229131A - Stationary bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp change in amt. of muscles and to set a target on a proper amt. of exercise by adding a wt. meter and a body fat measuring function on a stationary bicycle. SOLUTION: A control box 1 with which a pulse sensor E is connected through a cord C is fitted at the center of a handle H and a wt. measuring sensor consisting of a strain gauge is provided on the base part of a saddle post S and cycling exercise is performed by pedaling left and right pedals F by feet. The control box 1 has a built-in human body impedance measuring circuit 2 and an operating panel P is arranged in front of it. The operating panel P is mounted with electricity feeding side electrodes and a detection side electrodes on both left and right sides of an insulative box body to constitute four terminal electrodes, and a displaying part of a color LCD is provided on its front face and an up key, a down key, a selection key and a finishing key are respectively arranged below it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stationary bicycle for performing resistance training by adjusting a pedal load.

[0002]

Cycling exercises using stationary bicycles are the most common aerobic exercises performed in fitness facilities. Its features are that there is little body movement and the upper body is stable, and that the burden on the lower limbs and waist is light. In recent stationary bicycles, many can monitor heart rate fairly accurately using sensors such as ear sensors and grip handles, and there are a wide variety of exercise programs built into the microcomputer, from manual control to constant Some programs can automatically adjust the heart rate of a person to, for example, within ± 5 heartbeats. Since a stationary bicycle is a local exercise of the legs, the oxygen intake at the same heart rate is lower than that of the running. For this reason, it is particularly suitable for intensively dieting such as strengthening of leg strength and thinning of leg.

[0003] Muscles enlarge by applying a load according to physiological adaptation, activate the nervous system, and improve muscle function. As for the strength of resistance training, it is necessary to apply resistance to muscles that is at least higher than the muscle strength used in daily life, and this is called the principle of overload (overload). Muscles are atrophied when not used, and their function deteriorates accordingly, so it is important to continue training afterwards to maintain the effects obtained by training. In addition, the effect obtained by short-term resistance training largely depends on the adaptation of the nervous system, and it is necessary to repeatedly train for a long time until the effect brought about by morphological changes of muscles such as muscle hypertrophy appears. In this way, when cycling exercises for the purpose of strengthening the leg strength or slimming the legs, measuring weight and body fat to understand changes in muscle mass and setting an appropriate exercise amount target is more effective Training is possible.

Accordingly, an object of the present invention is to add a weight scale and a body fat measuring function to a conventional stationary bicycle so that a change in muscle mass can be grasped and an appropriate exercise amount target can be set. It is a thing.

[0005]

In order to achieve the above object, the present invention is configured as follows.

That is, according to the first aspect of the present invention, there is provided a weight sensor for measuring weight, a weight measured value output means for converting the weight measured value of the weight sensor into an electric signal and outputting the electric signal, and conductively contacting the left and right hands. Body impedance measuring means for measuring body impedance through four electrodes to be used,
Personal data input means for inputting personal data of age and height, body fat percentage calculating means for calculating body fat percentage based on these human body impedance, weight measurement value and personal data, and displaying the calculated body fat percentage And a display means. The invention according to claim 2 is the stationary bicycle according to claim 1, wherein the weight sensor is attached to a saddle. The invention according to claim 3 is the stationary bicycle according to claim 1, wherein the four electrodes are mounted on a surface of an operation panel mounted on a steering wheel. The invention according to claim 4 is the stationary bicycle according to claim 1, wherein the four electrodes are attached to a steering wheel. The invention according to claim 5 is the stationary bicycle according to claim 1, wherein an operation panel having the personal data input means is provided on the handle.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of a stationary bicycle embodying the present invention. In the stationary bicycle, a control box 1 for connecting a pulse sensor E via a cord C is attached to the center of a handle H, a weight measuring sensor (not shown) made of a strain gauge is provided at the base of the saddle post S, and left and right pedals are provided. Perform cycling exercise with F on your feet.

The control box 1 has a built-in human body impedance measuring circuit 2 which will be described later, and has an operation panel P on the front.

FIG. 2 is a front view of the operation panel P. The operation panel P includes power supply electrodes H on both left and right ends of the insulating casing.
1, H1 and detection-side electrodes H2, H2 are mounted to form a four-terminal electrode, a display portion D of a color LCD is provided on the front, and an up key K1, a down key K2, and a selection key K are provided below the display portion D.
3. Start / end keys K4 are arranged. The power supply side electrodes H1, H1 and the detection side electrodes H2, H2 may be attached to the left and right handles H.

The power supply side electrodes H1, H1 and the detection side electrodes H2,
H2 has its surface covered with hard chrome plating or the like, and is arranged at intervals so as not to contact each other.

The display unit D displays pedal speed, running distance, heart rate and the like during exercise, and also displays input data and measurement results of body fat measurement.

The up key K1 increases the number by one each time the key is pressed, and the down key K2 decreases the number one by one each time the key is pressed to input data such as gender, age, and height. . When inputting data, default values are displayed, and data input is performed by modifying those values.

The selection key K3 is used to select a menu for setting exercise load, measuring heart rate, measuring body fat, and the like.

The exercise load is set by changing the frictional resistance of the pedal F.

The heart rate is measured by holding the pulse sensor E in the earlobe, pressing the start / end key K4, performing three stages of one stage for three minutes, measuring the maximum oxygen uptake, and measuring the strength of the heart in five stages. To display.

The measurement of body fat is started by operating the up key K1 and the down key K2 to input gender, age and height.
Press the end key K4 to measure the human body impedance.
The measurement result is displayed on the display unit D in the form of a numerical value, a graph, or the like separately for the body fat percentage or the fat weight and the lean body mass.

FIG. 3 shows a block diagram of the human body impedance measuring circuit 2. The human body impedance measurement circuit 2
The 50 kHz sine wave AC voltage generated by the oscillator 21 is supplied to the power supply side electrodes H1, H1 of the control box 1 via the drive circuit 22, the transformer T1, and the changeover switch 23A.

The human body impedance is measured by first sitting on a saddle, measuring the weight, operating the operation panel P to input gender, age, and height, and as shown in FIG. Put your palm on it. Alternatively, when attaching the electrodes to the handle H, the handle H is held by the left and right hands. When the start / end key K4 of the operation panel P is pressed in this state, the left and right detection electrodes H2,
An AC voltage is generated during H2. These AC voltages are supplied to a changeover switch 23A, a transformer T2, a bandpass filter 24,
It is converted to a DC voltage via a rectifier circuit 25 and an amplifier 26,
A / D after waveform shaping, level adjustment, offset adjustment
Converter 27, CPU 4 via I / O interface 6
To enter. Thereby, the human body impedance between both hands is measured.

Before measuring the human body impedance, the output characteristics of the detection-side circuit are calibrated in advance in order to correct the measurement error due to the aging of the elements constituting the human body impedance measuring circuit 2 and the temperature characteristics. That is, the relationship between the human body impedance Z, which is two variables, and the AC voltage V detected by the detection-side circuit is applied to a regression line Z = kV + C0. Then, two dummy resistors R1 whose resistance values are known,
The same predetermined AC voltage as when measuring the human body impedance Z is applied to both ends of R2, the AC voltage V generated across both ends of the dummy resistors R1 and R2 is detected, and the proportional constant k and the fixed constant C0 of the regression line are determined. Ask.

For this reason, a control signal is output from the CPU 4 to switch the changeover switch 23A via the I / O interface 6, the changeover unit 28 and the changeover control circuit 29A, so that the secondary side of the transformer T1 and the primary side of the transformer T2 are connected. Between 2
The two dummy resistors R1 and R2 are connected. Next, CPU4
And switches the changeover switch 23B via the I / O interface 6, the changeover unit 28, and the changeover control circuit 29B to change the measurement target to the dummy resistor R1 or the dummy resistor R2.

[0022]

As described above, the stationary bicycle of the present invention is provided with means for measuring body weight and human body impedance to measure body fat. Therefore, according to the present invention, a change in muscle mass is grasped from a change in body weight and body fat to determine the exercise effect, so that an appropriate exercise amount target can be set and a more effective training plan can be formulated. .

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a stationary bicycle embodying the present invention.

FIG. 2 is a front view of an operation panel of the stationary bicycle embodying the present invention.

FIG. 3 is a block diagram of a human body impedance measuring circuit embodying the present invention.

FIG. 4 is an explanatory diagram of a method for measuring human body impedance.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 control box 2 human body impedance measuring circuit 21 oscillator 22 drive circuit 23 switch 24 bandpass filter 25 rectifier circuit 26 amplifier 27 A / D converter 28 switching unit 28 29 switching control circuit 4 CPU 6 I / O interface C code E pulse sensor F Pedal H Handle H1 Power supply side electrode H2 Detection side electrode K key P Operation panel S Saddle post T1-T2 Transformer

Claims (5)

[Claims] 1. A weight sensor for measuring a weight, a weight measurement value output means for converting a weight measurement value of the weight sensor into an electric signal and outputting the electric signal, and four electrodes to be brought into conductive contact with right and left hands. Body impedance measuring means for measuring human body impedance, personal data input means for inputting personal data of gender, age and height, and a body for calculating body fat percentage based on these human body impedance, weight measurement values and personal data A stationary bicycle comprising: a fat percentage calculating unit; and a display unit for displaying the calculated body fat percentage. 2. The stationary bicycle according to claim 1, wherein the weight sensor is attached to a saddle. 3. The system according to claim 1, wherein the four electrodes are mounted on a surface of an operation panel mounted on a handle.
The stationary bicycle described. 4. The stationary bicycle according to claim 1, wherein said four electrodes are attached to a steering wheel. 5. An operation panel having said personal data input means is provided on said handle.
The stationary bicycle described.