JP7161757B2 - Training support system - Google Patents

Description

The present invention relates to a training support system for improving athletic performance.

Athletes train hard to improve their athletic performance. In addition, training is carried out for post-illness rehabilitation and for maintaining or improving the physical strength of the elderly. In order to effectively perform such training, training evaluation devices, training support devices, and the like have been proposed.

The motion evaluation device described in Patent Document 1 is one of them, and has an acceleration sensor that detects acceleration of the subject's wrist and a strain sensor that detects contraction and expansion of muscles that move the subject's wrist. The exercise evaluation device calculates a physical condition evaluation value indicating the subject's fatigue, physical condition, etc. based on the time difference between the peaks of the output waveform of the acceleration sensor and the difference between the peaks of the output waveform of the strain sensor. .

Patent Literature 2 describes a training support device that analyzes the form of walking and running by attaching a measurement unit that measures acceleration in three axial directions of X, Y, and Z to the arm. This training support device is characterized by analyzing the timing balance between the swing of the arm and the landing of the foot by detecting the change in the balance between the X-axis acceleration component and the Y-axis acceleration component when the foot lands. .

Patent Literature 3 describes a swing evaluation device that evaluates changes in the posture of body parts of a subject by comparing them with predetermined criteria. This swing evaluation device has an acceleration sensor and a microphone that detects impact sound. The detection information of the acceleration sensor at a predetermined time going back to a preset time from the time when the microphone detects the impact sound is stored, and the stored detection information and the criterion information are compared to evaluate the swing.

In Patent Document 4, first to third guide sounds indicating the rhythm of the exercise form of the subject are produced from a speaker, and acceleration is detected by an acceleration sensor while the subject is exercising in accordance with the guide sounds for exercise evaluation. A motion assessment device is described that performs: This motion evaluation device obtains the time interval between the acquisition time of the characteristic point of the acceleration time waveform and the acquisition time of the waveform at the moment of impact, and determines the time interval between this time interval and the model time interval indicated by the ideal value parameter. Motion is evaluated based on the amount of deviation.

JP 2016-146987 A Japanese Patent No. 5888309 JP 2009-279126 A JP 2009-247529 A

According to the inventions described in Patent Documents 1 and 2, it is possible to evaluate the current exercise capacity of a subject. However, since this is not a prospective evaluation that takes future improvement in athletic ability into consideration, it cannot be expected to have the effect of improving the willingness of the subjects themselves to always aim for personal bests.

According to the inventions described in Patent Literatures 3 and 4, training can be performed using a criterion or an ideal value parameter as an attainment target. However, since it is not possible to expect a training effect that exceeds the criteria or the ideal value parameters, it is not possible to expect an effect of improving the willingness of the subject to always aim for personal best.

SUMMARY OF THE INVENTION An object of the present invention is to provide a training support system that allows a subject to improve his or her athletic ability with high motivation.

A training support system according to the present invention includes:
It can be worn on the trunk of a subject, and can detect acceleration in the X-axis direction and the Z-axis direction, where the left-right direction of the subject is the X-axis direction and the front-back direction of the trunk is the Z-axis direction. an accelerometer that can
a control unit that generates acceleration data in the X-axis direction and the Z-axis direction from the output signal of the acceleration sensor;
Analyze the acceleration data in the X-axis direction and the Z-axis direction, obtain the sum of the X-axis acceleration and the Z-axis acceleration at the timing when the X-axis acceleration is maximum, and obtain the sum of the accelerations obtained by a plurality of trials. and an evaluation unit that evaluates the exercise ability of the subject according to the maximum value of .

According to the training support system of the present invention, the maximum value of the sum of the acceleration data obtained by multiple trials is used to evaluate the exercise ability of the subject, so the subject can work to improve the exercise ability with high motivation. In addition, since the evaluation is based on the maximum value of the sum of the maximum acceleration of the X-axis and the acceleration of the Z-axis at the timing when the acceleration of the X-axis, which is more important than the acceleration of the Z-axis, reaches its maximum, it is possible to evaluate more desirable athletic performance. Become.

1 is a block diagram showing an embodiment of a training support system according to the present invention; FIG. FIG. 3 is a schematic diagram for explaining detection axes of an acceleration sensor applied to the present invention; It is a front view which shows the example of the said acceleration sensor. It is a side view of the acceleration sensor. It is a figure which shows the example of the display screen of the display in the control part of the said Example. Fig. 4 is a waveform diagram of output detected by the acceleration sensor, wherein (a) is a waveform diagram showing outputs of the X, Y, and Z axes, (b) is an output waveform diagram of the X axis, and (c) is an output of the Z axis. Waveform diagram, (d) is an output waveform diagram of the Z-axis.

An embodiment of a training support system according to the present invention will be described below with reference to the drawings.

[Overall Configuration of Embodiment]
First, the overall configuration of an embodiment of a training support system according to the present invention will be described with reference to FIG. This training support system is roughly divided into hardware 1 , software 2 , and evaluation server 3 . Software 2 functions as a control unit for the entire training support system.

The hardware 1 has a speaker 11 , an acceleration sensor 12 , a camera 13 , a microphone 14 and a feedback reproducing section 15 . A smart phone (hereinafter referred to as "smart phone") has functions that are shared by the speaker 11, the camera 13, the microphone 14, and the feedback reproducing unit 15, except for the acceleration sensor 12. FIG. Therefore, the hardware 1 can use the smartphone except for the acceleration sensor 12 .

When the sound source data or the audio signal is input, the speaker 11 is driven corresponding to the sound source data or the audio signal, and emits a sound corresponding to the sound source data or the audio signal.

The acceleration sensor 12 is worn by a subject, such as an athlete who is training, to detect acceleration associated with exercise of the subject. The acceleration sensor 12 detects acceleration in the X-axis, Y-axis, and Z-axis directions, which are perpendicular to each other, as the subject starts exercising. The configuration of the acceleration sensor 12 will be specifically described later.

The camera 13 can photograph and record the exercise scene of the subject and output the recorded video data. The microphone 14 can record motion sounds and output recorded sound data. The exercise sound includes the sound reproduced by the speaker 11 as well as the operation result sound such as wind noise generated by the subject's training.

The feedback reproduction section 15 performs feedback reproduction based on a feedback signal transmitted from the software 2 as a control section. Feedback reproduction includes image reproduction on a display based on HTML data or PDF data and audio reproduction by the speaker 11 .

The software 2 is installed as smartphone application software (hereinafter referred to as "application") when a smartphone is used as the hardware 1 as in the above example. The software 2 has a sound source data storage unit 21, an acceleration data storage unit 22, a video data storage unit 23, a sound data storage unit 24, and a feedback reception unit 25 as functional blocks.

The sound source data storage unit 21 stores a reference training sound, and its reproduction data is input to the speaker 11, and the speaker 11 emits a sound corresponding to the reproduction data.

The acceleration data storage unit 22 stores acceleration data input from the acceleration sensor 12 via an appropriate wireless communication system such as Bluetooth (registered trademark). The acceleration data storage unit 22 also converts the acceleration data into CSV data and transmits it to the evaluation server 3 .

The image data storage unit 23 stores image data input from the camera 13, and can read out the stored image data as necessary. The sound data storage unit 24 stores sound data input from the microphone 14, and can read out the stored sound data as necessary. As described above, the sound data includes the reference training sound and the motion result sound of the subject.

The feedback receiving section 25 receives a feedback signal input from the feedback transmitting section 33 of the evaluation server 3 and transmits this received signal toward the feedback reproducing section 15 of the hardware 1 .

The evaluation server 3 has an evaluation section 31 , a report data generation section 32 and a feedback transmission section 33 .

The evaluation unit 31 receives acceleration data, video data, and sound data from the acceleration data storage unit 22, the video data storage unit 23, and the sound data storage unit 24 of the software 2 as the control unit. The evaluation unit 31 evaluates the exercise ability of the subject based on these acceleration data, video data, and sound data, and outputs evaluation data. The evaluation method will be explained later.

The report data generation unit 32 generates report data from the evaluation data input from the evaluation unit 31 . The report data may be in an appropriate data format, such as HTML format or PDF format. The report data is input to the feedback transmission section 33 and transmitted from the feedback transmission section 33 to the feedback reception section 25 of the software 2 .

A large block on the left side of FIG. 1 describes several small blocks that correspond to the above-mentioned functional units of the hardware 1 and indicate the movement of the player side, ie, the subject. Each block is assigned a code such as "3-1", "3-2", . . . that identifies each functional block.

The subject starts exercising, triggered by training sounds reproduced by the speaker 11, for example (3-1). With the start of exercise, the acceleration sensor 12 is activated (4-1), and its detection signal is input to the acceleration data storage section 22 of the control section by wireless communication (5-1). The subject can also confirm the feedback playback sound from the speaker 11 driven by the feedback playback unit 15 of the control unit or the feedback image displayed on the display (11-1), and can start the operation (3- 1). A detection signal of the acceleration sensor 12 accompanying the start of exercise of the subject based on the feedback reproduction is also input to the acceleration data storage unit 22 (5-1).

The motion scene (3-2) of the subject is photographed by the camera 13 (4-2). Motion sounds generated by the exercise of the subject, such as wind noise due to bat swing and training sounds reproduced by the speaker 11, are recorded by the microphone 14 (4-1).

[Configuration and usage example of acceleration sensor]
3 and 4 show examples of the acceleration sensor 12. FIG. The acceleration sensor 12 is a three-axis acceleration sensor capable of detecting acceleration in directions of X, Y, and Z axes perpendicular to each other. When the acceleration sensor 12 is viewed from the front side, the horizontal direction is the X-axis direction, the acceleration to the right is X+, and the acceleration to the left is X-. When the acceleration sensor 12 is viewed from the front side, the vertical direction is the Y-axis direction, the upward acceleration is Y+, and the downward acceleration is Y-.

As shown in FIG. 4, the horizontal direction of the acceleration sensor 12 when viewed from the side, that is, the front-to-rear direction of the acceleration sensor 12 is defined as the Z-axis direction, and the acceleration to the front side (left side in FIG. 4) is Z+, and the acceleration to the rear side (FIG. ) to the right) is Z-. The acceleration sensor 12 incorporates an appropriate attachment for wearing on the subject. In the illustrated example, a clip 121 is incorporated on the back side of the acceleration sensor 12 so that the subject can be attached to a belt or the like using the clip 121 .

FIG. 2 shows an example of detection axes that can be detected by wearing the acceleration sensor 12 on the subject. For example, using a belt around the waist of the subject, the device is worn on the back side, with the Z-axis aligned with the spine and at the position closest to the spine. When the subject performs an exercise such as a bat swing, the subject rotates around the trunk, and the acceleration sensor 12 outputs three-axis acceleration signals. Acceleration in the horizontal direction is output as an acceleration signal in the X-axis direction. Acceleration in the longitudinal direction is output as an acceleration signal in the Z-axis direction. Acceleration in the vertical direction is output as an acceleration signal in the Y-axis direction.

Assuming that the subject performs a baseball bat swing, the body rotates around the center of the trunk. Since the acceleration sensor 12 is mounted outside the center of rotation, when the body rotates, the acceleration component in the X-axis direction is detected by the sensor in the X-axis direction, and the acceleration component in the Z-axis direction is detected by the sensor in the Z-axis direction. detects. If the bat swing is sharp, the acceleration detection signal in the X-axis direction and the acceleration detection signal in the Z-axis direction are large, and the time interval difference between the peaks of the acceleration detection signals in the X-axis direction and the Z-axis direction is large. small.

If the acceleration detection signal in the Y-axis direction, that is, in the vertical direction is large, the vertical movement during the bat swing is large, which is a factor in lowering the probability of just hitting the ball. Therefore, it is desirable that the acceleration in the Y-axis direction be as small as possible in both the + and - directions. However, if the player's intention is to reduce the acceleration in the Y-axis direction, the intention to increase the acceleration in the X-axis and Z-axis directions may decrease, resulting in a smaller swing. Therefore, until the swing ability is improved to a certain level, it is also effective to evaluate the acceleration in the X-axis direction and the Z-axis direction and ignore the Y-axis direction.

[Specific examples of training support]
The outline of the embodiment of the training support system according to the present invention has been described above. Next, the above embodiment will be described in more detail while explaining the operation of the above embodiment. Here, training support for improving baseball bat swing ability will be described as an example.

FIG. 5 shows an example of a screen displayed on the display of the hardware 1. As shown in FIG. As shown in FIG. 5, approximately the upper half of the display is an image display section 131 of a bat swing or the like captured by the camera 13 . The image in FIG. 5 is an example of a swing by a right batter. The image displayed by the image display unit 131 may be a still image during one swing or a decomposed image at fixed time intervals, but preferably a moving image.

Assuming that a given exercise form is repeated a given number of times as one course, in the illustrated specific example, one course consists of repeating the bat swing five times. The image displayed on the image display unit 131 may be the last image in one course, or the image evaluated as the maximum athletic ability in one course. Evaluation of athletic performance will be described later. The image displayed on the image display unit 131 may be an exercise form arbitrarily selected from stored image data.

About half of the lower side of the display is a display portion 132 for the acceleration waveform output from the acceleration sensor 12 . The acceleration waveforms displayed on the display unit 132 are the acceleration waveforms for one course, in the specific example shown, the acceleration waveforms due to five bat swings are displayed in order along the time axis. In the example shown in FIG. 5, the display order of the acceleration waveforms is represented by (1) to (5), and the X-axis waveform, Y-axis waveform, and Z-axis waveform are superimposed on the same time axis. is displayed.

The display is provided with various operation units and display units for performing or complementing functions required as hardware in the present invention. Examples include a self-portrait mode button, a communication button, a waveform mode selection button, a sound pressure display button, a CSV export button, and a data communication time display column.

FIG. 6 separately shows a waveform obtained by superimposing the acceleration waveforms for the three axes displayed on the display unit 132 and acceleration waveforms in the directions of the X, Y, and Z axes that constitute this waveform. FIG. 6A shows acceleration waveforms in the X, Y, and Z axial directions together, which corresponds to the acceleration waveforms displayed on the display unit 132 in FIG. 6(b) shows the acceleration waveform in the X-axis direction, FIG. 6(c) shows the acceleration waveform in the Y-axis direction, and FIG. 6(d) shows the acceleration waveform in the Z-axis direction, respectively, on a common time axis.

As can be seen from these acceleration waveforms, the acceleration waveform of each axis differs depending on the number of bat swing trials. When observed in more detail, the peak values of the acceleration in each axial direction appear to be substantially synchronized, but when observed strictly, the timing at which the peaks appear, that is, the positions on the time axis are slightly different.

The evaluation unit 31 records the maximum value of the acceleration of each axis from the acceleration data of the X, Y and Z three axes of each bat swing. In the case of a right-handed batter, the sum of the peak value in the +X-axis direction and the +peak value in the Z-axis direction for each bat swing is calculated. In the case of a left-handed batter, the sign of the acceleration in the X-axis direction is opposite to that in the case of a right-handed batter, so the sign of the acceleration in the X-axis direction is reversed. Furthermore, the maximum sum of the above peak values obtained by a plurality of trials forming one course is obtained, and the exercise capacity of the subject is evaluated based on this maximum value.

In this way, the exercise ability is evaluated by the maximum value of the X-axis and Z-axis acceleration. This is because the acceleration increases. That is, the greater the acceleration on the X and Z axes, the sharper the rotation or twisting of the body.

Acceleration in the horizontal direction, that is, in the X-axis direction with reference to the center of the trunk is important for the acceleration during exercise. Therefore, the sum of the X-axis acceleration at the timing when the X-axis acceleration reaches its maximum and the Z-axis acceleration at that time is obtained, and the athletic ability is evaluated based on the value of this sum. In addition, the sum of the above accelerations is obtained for each of multiple trials in one course, and the maximum value of this sum is recorded as the test subject's record. By doing so, an appropriate and highly reliable evaluation can be performed.

In the above evaluation, no consideration is given to the difference in the timing at which the acceleration in the X-axis direction and the Z-axis direction become maximum. However, when evaluating exercise capacity by the maximum value of the sum of the peak values of acceleration on the X-axis and Z-axis, the difference in the timing at which the peak values of acceleration on the X-axis and Z-axis appear, that is, the time interval between the peak positions It is even better if it is an element of evaluation. Even if the sum of the peak values of the X-axis and Z-axis accelerations is maximized, if there is a large deviation in the time interval between the peak positions, the synergistic effect of the X-axis and Z-axis accelerations cannot be obtained. be. In the case of a bat swing, when the bat is hit by hand without utilizing the trunk, there is a large deviation in the time interval between the peak positions.

Therefore, the evaluation unit 31 analyzes the acceleration data in the X-axis direction and the Z-axis direction to obtain the degree of synchronization of the acceleration timings of the X-axis and the Z-axis and the sum of the acceleration data of the X-axis and the Z-axis. Then, the athletic ability of the subject is evaluated by adding the degree of synchronization to the sum of the maximum values of the acceleration data obtained by trials. The degree of synchronism can be added by setting a coefficient according to the time interval deviation of the peak values of the X and Z axes, and multiplying the maximum value of the sum of the acceleration data by this coefficient. The exercise ability is evaluated in consideration of the degree of synchronism for each trial in one course, and the maximum evaluation value is extracted and stored.

The above evaluation ignores Y-axis acceleration. The fact that the Y-axis acceleration is detected means that a vertical movement has occurred during the bat swing. When vertical movement occurs, the line of sight fluctuates up and down, increasing the probability of missing the ball. Therefore, it is preferable to add the maximum value of the Y-axis acceleration as a negative factor to the maximum value of the sum of the X-axis and Z-axis accelerations. In this case as well, a coefficient corresponding to the magnitude of the Y-axis acceleration can be set, and the maximum value of the sum of the acceleration data can be multiplied by this coefficient. Vertical movement is a negative factor for evaluation in both the + and - directions, so the absolute value of the acceleration sensor output in the Y-axis direction is taken into account as a negative factor.

However, a good batter with a powerful and sharp swing also has a lot of vertical movement. Also, if you are conscious of the vertical movement, the acceleration on the X-axis and the Z-axis will not improve, and the swing will tend to be small. Therefore, it is also an effective training method to intentionally ignore the acceleration data in the Y-axis direction and focus only on the accelerations in the X-axis and Z-axis and concentrate on improving the accelerations in the X-axis and Z-axis. . With this intention, it is preferable to switch the evaluation mode of the evaluation unit 31 between the X-axis and Z-axis acceleration evaluation modes.

When the swing ability is improved beyond a certain level, the acceleration in the Y-axis direction should be added as a negative factor to the acceleration evaluation of the X-axis and Z-axis. If the acceleration in the Y-axis direction is large, it becomes a negative factor in the evaluation of the acceleration in the X-axis and Z-axis. can work on

Evaluation of acceleration can be performed for each bat swing. Assuming that one course has five swings, five evaluation results can be obtained. In the case of this example, the evaluation unit 31 evaluates the evaluation value of the swing that obtains the maximum value in one course of five swings as the exercise ability of the subject. Evaluation in this case can be automatically performed by setting the following calculation formula.
for (var i=0; i<5; i++)
{if (X>Z&topX<X) {topXZ=X+Z; topX=X;}}

In the above formula, X is the maximum acceleration value in the X-axis direction and Z is the maximum acceleration value in the Z-axis direction. Acceleration in the X-axis direction is evaluated higher than acceleration in the Z-axis direction. Therefore, at the timing when the X-axis acceleration becomes maximum, the Z-axis acceleration is added, and the value of X+Z at this time is recorded. Assuming that 5 swings are performed in one course, the one with the maximum X+Z value among the 5 swings is evaluated as X+Z=top acceleration value.

Both the X-axis and the Z-axis are output as positive signals in the acceleration direction and negative signals in the deceleration direction, and the evaluation unit 31 evaluates the exercise ability of the subject based on the maximum value that takes into account the positive and negative values of the output of the acceleration sensor. In addition, the acceleration direction of the X-axis during the swing is reversed between the right batter and the left batter, and the sign of the acceleration sensor output signal is reversed. Therefore, when the sign of the maximum acceleration signal is reversed, the data of the maximum acceleration signal is multiplied by -1 to obtain a correct value for evaluation.

Returning to FIG. 1, the evaluation unit 31 in the evaluation server 3 performs evaluation using the acceleration data explained so far (6-1), generates and stores the evaluation data, and outputs it as necessary. The evaluation unit 31 also receives video data (5-2) from the video data storage unit 23 and sound data (5-3) from the audio data storage unit, and outputs respective data. The evaluation data, video data, and sound data output from the evaluation section 31 are input to the report data generation section 32 (7-1), and each of the above data is generated as report data.

The report data is output from the feedback transmitting section 33 (8-1) and input to the feedback reproducing section 15 of the hardware 1 via the feedback receiving section 25. FIG. The feedback reproduction unit 15 inputs the image signal to the image display unit 131 of the display of the hardware 1 described with reference to FIG.

The feedback reproduction unit 15 drives the speaker 11 with an audio signal picked up by the microphone 14 while reproducing the swing image, and reproduces the audio signal from the speaker 11 in synchronization with the swing image. When the speaker 11 reproduces the training sound stored in the sound source data storage unit 21 and the subject swings in accordance with the reproduced sound, the training sound and the operation sound such as the wind noise when the subject swings are recorded. be.

The subject can reproduce the above two sounds at the same time and confirm the difference in timing between the two sounds. The subject can improve his exercise ability (bat swing ability in this example) by training so that the difference between the two sounds becomes small.

The feedback playback unit 15 can also display an acceleration waveform on the display unit 132 based on acceleration data obtained each time the subject swings. By observing the acceleration waveform, the subject can visually visualize his/her exercise ability and the transition of the exercise ability.

INDUSTRIAL APPLICABILITY The present invention can be used not only for bat swing training, but also for all kinds of exercise training, and can contribute to the improvement of each exercise ability. For example, it can be used for exercise training involving rotation or twisting of the whole or a part of the body, such as golf swing, baseball pitching, and tennis.

A golf swing is executed by a series of actions from set-up to start of backswing->backswing->return from top position to downswing->downswing->impact->follow->finish. In the case of golf, tempo, rhythm, and timing are important, and these factors also affect acceleration along the X and Z axes. Also, it is desirable that the Y-axis acceleration be as small as possible. Therefore, in the case of golf training as well, the evaluation method based on the acceleration of each axis described above can be applied.

The tempo, rhythm, and timing of the golf swing differ slightly depending on the type of club, that is, between wood and iron, and between short iron and long iron. Therefore, in the sound source data storage unit 21 shown in FIG. 1, sound sources with tempos and rhythms suitable for each club swing are stored, and these are reproduced by the speaker 11 to match the tempo and rhythm of the sound to be reproduced. It is good to practice your swing.

Beginners of golf do not know how to move their bodies during a swing, the acceleration of each axis is small, and the deviation of the peak position of the acceleration of each axis is large. By referring to waveform diagrams displayed on the display for the acceleration of each axis and their peak positions, the subject can intuitively recognize the problem of his/her own form. By using the system according to the present invention, beginners can recognize the footprints of their own progress, and advanced users can check the disturbance of form by checking the acceleration of each axis and its timing. .

When the system according to the present invention is used for baseball pitching training, for example, training can be performed so that even if the types of pitches to be thrown are different, the pitches can always be thrown with the same form, the same tempo, and the same timing. Training like this helps keep the batter from knowing what type of pitch you're throwing.

[Effects of Examples of the Present Invention]
According to the embodiment of the training support system according to the present invention, the following effects can be obtained.

Acceleration in the left-right direction with respect to the center of the trunk, that is, acceleration in the X-axis direction is important when exercising. Seek to assess athletic performance. Therefore, an appropriate and highly reliable evaluation can be performed.

The synergistic effect of the two-axis acceleration increases as the timing of the maximum acceleration in the X-axis and the timing of the maximum acceleration in the Z-axis, that is, in the longitudinal direction decreases. Therefore, the sum of the maximum values of the X-axis and Z-axis accelerations is combined with the difference in acceleration timing between the two to evaluate athletic ability, thereby enabling an appropriate and highly reliable evaluation.

The sum of X-axis and Z-axis acceleration data is obtained for each trial by trying bat swings, etc. multiple times. training can be undertaken with the aim of Therefore, the subject can improve the training effect by always motivating himself/herself to renew his/her personal best.

[others]
The embodiment described above is merely an example of the case of carrying out the present invention, and may be arbitrarily modified without departing from the technical scope of the invention described in each claim.

1 hardware 2 software (control unit)
11 speaker 12 acceleration sensor 14 microphone 31 evaluation part

Claims (9)

It can be worn on the trunk of a subject, and can detect acceleration in the X-axis direction and the Z-axis direction, where the left-right direction of the subject is the X-axis direction and the front-back direction of the trunk is the Z-axis direction. an accelerometer that can
a control unit that generates acceleration data in the X-axis direction and the Z-axis direction from the output signal of the acceleration sensor;
Analyze the acceleration data in the X-axis direction and the Z-axis direction, obtain the sum of the X-axis acceleration and the Z-axis acceleration at the timing when the X-axis acceleration is maximum, and obtain the sum of the accelerations obtained by a plurality of trials. and an evaluation unit that evaluates the exercise performance of the subject by the maximum value of . It can be worn on the trunk of a subject, and can detect acceleration in the X-axis direction and the Z-axis direction, where the left-right direction of the subject is the X-axis direction and the front-back direction of the trunk is the Z-axis direction. an accelerometer that can
a control unit that generates acceleration data in the X-axis direction and the Z-axis direction from the output signal of the acceleration sensor;
The degree of synchronization obtained by analyzing the acceleration data in the X-axis direction and the Z-axis direction, obtaining the degree of synchronization between the acceleration timings of the X-axis and the Z-axis and the sum of the acceleration data of the X-axis and the Z-axis, and obtaining the degree of synchronization obtained by a plurality of trials. and an evaluation unit that evaluates the exercise capacity of the subject based on the maximum value of the sum of the acceleration data. The acceleration sensors in the X-axis direction and the Z-axis direction output positive signals in the acceleration direction and negative signals in the deceleration direction. 3. The training support system according to claim 1, which evaluates ability. The acceleration sensor is a three-axis acceleration sensor in which the Y-axis direction, which is the vertical direction of the subject, is added to the X-axis and Z-axis. 4. A training support system according to claim 1, 2 or 3, wherein the absolute value of the directional acceleration sensor output is taken into account as a negative factor in evaluating the exercise capacity of the subject. 5. The training support system according to any one of claims 1 to 4, wherein a predetermined exercise form is repeated a predetermined number of times to form one course, and the maximum evaluation value by the evaluation unit for each course is recorded as the subject's record. 6. The training support system according to any one of claims 1 to 5, wherein the control unit can generate an audio signal at a predetermined timing according to the type of exercise, and has a speaker that reproduces the audio signal. 7. The method according to claim 6, further comprising a microphone capable of picking up exercise sounds of the subject, and wherein the control unit inputs the exercise sounds picked up by the microphone into the evaluation unit for evaluation of the exercise ability of the subject. Training support system. 8. The training support system according to claim 7, wherein the evaluation unit uses the difference in timing between the sound reproduced by the speaker based on the audio signal and the motion sound picked up by the microphone for evaluation of exercise ability of the subject. 9. The training support according to claim 8, wherein the evaluation unit feeds back a timing difference between the reproduced sound and the exercise sound to the control unit, and the control unit drives the speaker at a timing corresponding to the timing difference. system.

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