JP2015146942A - muscle strengthening system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a muscle strengthening system capable of evaluating change in a muscle quality by exercises combining electric stimulation for the suppression and prevention of muscle strength decline in the elderly.SOLUTION: A muscle strengthening system includes: exercise stimulation detection means for detecting a state of exercise stimulation that acts on a subject; electric stimulation means for applying a stimulation current to a muscle of the subject that contracts by exercise stimulation; electric stimulation control means for controlling the output of the electric stimulation means according to a signal of the exercise stimulation detection means; myoelectricity detection means for detecting the myoelectricity of the subject for an arbitrary period from the stop of the electrification by the electric stimulation means to the start of the next electrification; and myoelectricity waveform analysis means for analyzing the waveform of the detected myoelectricity.

Description

  The present invention relates to a muscular strength enhancement system mainly used for muscular strength enhancement and functional recovery of trunk and lower limb muscle groups.

  In general, elderly people lose muscle mass and strength as they age, but in particular, aging is considered to be sarcopenia, and muscle weakness is dynapenia. It has been broken. Among them, muscle weakness (dynapenia) progresses faster than muscle mass decline (sarcopenia), and it has been reported that this muscle weakness has a greater effect on QOL of elderly people. In other words, this muscle weakness increases the risk of falls and osteoporotic fractures and increases the risk of disability and death, and when the fall causes fractures of the lower limbs such as the femoral neck and compression fractures of the lumbar spine, the physical function is remarkably increased. It is damaged and forced to sleep for a long time and contributes to bedridden. In recent years, global aging has become a social problem, and it is an urgent task to take measures to improve and prevent sarcopenia and dynapenia.

  In elderly people, the ability to regenerate muscle fibers decreases due to aging and inactivity, and fast muscle fibers are selectively contracted. Once the fast muscle fibers are contracted and the muscular strength is reduced, it is extremely difficult to recover the muscle strength. In particular, it is difficult for an elderly person whose muscular strength has been reduced to perform exercise and training menus whose main purpose is to train fast muscles, and it is virtually impossible to recover the muscular strength once reduced.

  Therefore, the present applicant has devised an exercise device disclosed in Patent Document 1 below. The device is intended to improve the exercise effect on both the fast and slow muscles, and to safely carry out balance ability training while avoiding the risk of falls. In response to this, the electrical stimulation combined exercise apparatus applies electrical stimulation to at least part of the user's lower back and lower limbs.

  On the other hand, after training and rehabilitation, evaluation for verifying the effect is important. In addition to muscle strength measurement, myoelectric measurement for evaluating the contraction state of muscle groups is widely performed. However, if myoelectric measurement is performed on muscles contracted by electrical stimulation, such as the above-mentioned exercise device combined with electrical stimulation, noise of electrical stimulation is also detected and pure muscle contraction data is detected. Therefore, it is common sense that it is completely meaningless or not to perform myoelectric measurement for muscle contraction caused by electrical stimulation. Accordingly, it has been desired to establish a method for verifying and evaluating the effectiveness of improvement and prevention of sarcopenia and dynapenia as well as the effect of the exercise itself in the above-mentioned electric stimulation combined exercise apparatus.

JP 2007-111122 A

  In view of the above problems, an object of the present invention is to provide a muscle strengthening system that can evaluate the exercise effect and the quality of muscles in exercise combined with electrical stimulation.

  That is, the invention according to claim 1 is an exercise stimulus detection unit that detects an action state of an exercise stimulus on a subject, an electrical stimulation unit that supplies a stimulation current to a muscle of the subject that contracts by the exercise stimulus, and the exercise stimulus detection unit. Electrical stimulation control means for controlling the output of the electrical stimulation means in response to the signal of EMG, and the myoelectricity of the subject in an arbitrary period from when the energization by the electrical stimulation means is stopped until the next energization is started And a myoelectric detection means for detecting muscular strength.

  The invention according to claim 2 is the invention according to claim 1, further comprising myoelectric waveform analysis means for analyzing the detected myoelectric waveform, and based on the analysis result by the myoelectric waveform analysis means, fast muscle and slow muscle Estimate the percentage of activity.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the boarding board on which the subject is boarded, the drive mechanism that swings the boarding board, and the shaking of the boarding board. A swing reversal detecting means for detecting the reversal timing of the motion and a swing standing swing motion device comprising a swing control unit for controlling the drive mechanism, and the load standing swing motion device is provided to the subject. On the other hand, a movement stimulus is applied to the movement, and a movement reversal detecting means detects the reversal timing of the swing of the riding board.

  According to a fourth aspect of the present invention, there is provided the posture control analyzing means for determining the posture control ability of the subject in the third aspect of the invention.

  According to the first aspect of the present invention, the motion stimulus detection means for detecting the action state of the motion stimulus for the subject, the electrical stimulus means for energizing the stimulus current to the muscle of the subject contracted by the motion stimulus, and the motion stimulus detection means Electrical stimulation control means for controlling the output of the electrical stimulation means in response to the signal of EMG, and the myoelectricity of the subject in an arbitrary period from when the energization by the electrical stimulation means is stopped until the next energization is started It is composed of a myoelectric detection means that detects muscles, and while activating the slow muscles mainly by exercise stimuli and the fast muscles mainly by electrical stimuli simultaneously, the muscle strength is efficiently enhanced by the synergistic effect of both stimuli. And can be contracted by exercise combined with electrical stimulation by detecting myoelectricity of the subject in any period between when the energization by the electrical stimulation means is stopped and when the energization is started next Against muscle It is possible to perform the myoelectric detection.

  According to the second aspect of the invention, the electromyographic waveform analyzing means for analyzing the detected myoelectric waveform is provided, and the ratio of the fast muscle and the slow muscle activity is estimated from the analysis result by the myoelectric waveform analyzing means. By comparing the ratio with time and comparative evaluation with healthy subjects, it is possible to verify the progress of dynapenia and the effect of exercise combined with electrical stimulation from the aspect of muscle quality. In other words, selective atrophy of fast muscles due to aging and inactivity not only decreases muscle mass and strength but also changes the quality of muscle itself. Is defined as the quality of the muscle, and the comparative change of this change over time makes it possible to verify the progress of dynapenia and the effect of exercise combined with electrical stimulation. I can expect.

  According to the invention of claim 3, a boarding board on which the subject is boarded, a drive mechanism unit that rocks the boarding board, a rocking reversal detecting means for detecting a reversal timing of the rocking of the boarding board, A load standing rocking exercise device comprising a rocking control unit that controls the drive mechanism unit, the load standing rocking exercise device applies a motion stimulus to a subject, and as a motion stimulation action situation, Since the swing reversal detection means detects the reversal timing of the swing of the boarding board, even if the subject can hold a standing position even if the subject is an elderly person with a significant decrease in muscle strength, It is possible to obtain good closed chain muscle contraction of the trunk and lower extremity muscle group with light exercise intensity without effort, and synergistically and efficiently train slow and fast muscles, Can grasp the change in quality of the muscle strength Improvement and prevention below is possible to effect verification of electrical stimulation in combination movement can be expected. That is, the motion stimulus by the load standing swing motion device is a forced swing motion stimulus of the boarding board by the drive mechanism, and when this stimulus is applied to the subject, the reflex function in the subject's sense of equilibrium is utilized. It is possible to induce involuntary muscle contraction of the trunk and lower limb muscle groups necessary for maintaining the standing balance. Since the reflex function in the balance sense is mainly a function of the cerebellum and brainstem, higher-order functions of the brain do not intervene, so make efforts to inspire the feeling that the subject himself must “exercise” Muscle contraction can be obtained without need. Furthermore, even for patients and elderly people who cannot exercise at high intensity due to various joint diseases, heart diseases, or diseases such as diabetes, or trauma, safe and effective exercise can be performed, and effective muscle strengthening effect can be achieved. Expected to increase the therapeutic effect of various diseases and trauma.

  According to the invention described in claim 4, since the posture control analyzing means for determining the posture control ability of the subject is provided, it is expected to evaluate, improve and prevent the fall risk in addition to the evaluation of the muscle quality. That is, by evaluating together with the posture control analysis result and the myoelectric analysis result, it is possible to evaluate the muscle quality and balance ability with higher accuracy and to expect the fall prevention effect from both the strength enhancement and posture control aspects. .

It is a block diagram of the muscular strength augmentation system of the Example of this invention. It is a block diagram of the circuit etc. of the muscular strength augmentation system of the Example of this invention. It is an example of the signal output waveform of the muscular strength augmentation system of the example of the present invention.

  As shown in FIG. 1, the embodiment of the muscular strength augmenting system 1 according to the present invention includes a load standing and oscillating exercise device 21 that applies exercise stimulus to a subject, electrical stimulation means 40, electrical stimulation control means 41, and myoelectric detection means. 50, and the control device 10 including the main control unit 11 that controls the interlocking of the load standing and swinging motion device 21, the electrical stimulation means 40, the myoelectric detection means 50, and the like, and a record for recording various detected data It comprises a recording analysis device 60 comprising means 62, myoelectric waveform analysis means 63 and the like, and a wireless remote controller 9 capable of remotely operating the load standing oscillating motion device 21 and the control device 10. As another embodiment, in addition to the present embodiment, a floor reaction force meter 71 that measures the floor reaction force of the subject M who has boarded the load standing and oscillating motion device 21, and a posture control situation is kinematic. Attitude control analysis means 70 constituted by a motion analysis device 80 or the like for analysis may be provided.

  As shown in FIGS. 1 and 2, the load standing and oscillating motion device 21 forcibly reciprocates the boarding board 25 on which the subject M is boarded in the horizontal direction by the drive mechanism unit 26. The drive mechanism section 26 is driven based on various signals input from the swing control section 22, and in this embodiment, the swing period of the board 25 can be adjusted from 0.3 to 3 Hz, and from moment to moment. It is also possible to change the oscillation cycle. As shown in FIG. 2, various exercise conditions such as the oscillation cycle and the exercise time are input to the oscillation control unit 22 by operating the wireless remote controller 9. Although the board 25 is reciprocated in the horizontal direction, for example, the direction and amount of movement can be made variable, the board can be tilted in any direction, and the board 25 can be divided so that the left and right limbs can move separately. As long as an exercise stimulus capable of obtaining muscle contraction for maintaining the posture of the subject M is obtained, the manner of movement of the boarding board 25 is not limited to the exemplified manner and structure.

  The load standing swing motion device 21 is provided with a swing inversion detection means 24 for detecting the inversion timing of the board 25 as the motion stimulus detection means 23 in order to detect the action state of the motion stimulus with respect to the subject M. Yes. Specifically, the swing reversal detecting means 24 may be an encoder interlocked with the motor of the drive mechanism section, a limit switch provided at the reversal position of the boarding plate 25, but is not limited to this configuration. Various sensors that can grasp the position and speed of the plate 25 or the operating status of the drive mechanism section 26 may be provided to detect the operating status of the motion stimulus. As shown in FIG. 2, the signal detected by the swing inversion detection means 24 is transmitted to the control device 10 as a signal for setting the timing of electrical stimulation or myoelectric detection.

  As shown in FIG. 1, the load standing swing motion device 21 is provided with a handrail 30 and a suspension portion 31 in order to prevent a fall accident during a motion of the subject M by the device. The handrail 30 holds the standing posture by the subject M holding himself / herself during exercise and prevents the handrail 30 from falling. Moreover, the suspension part 31 is comprised by the support | pillar part 32 and the equipment 33, and hold | maintains the test subject's M standing position by connecting the belt part 34 of the equipment 33 with which the test subject M was mounted | worn to the suspension part 31. The length of the belt portion 34 is adjustable so that the muscle contraction related to the posture control of the subject M is not affected.

  Further, the load standing swing motion device 21 is provided with an emergency stop means 35 for stopping the driving of the board 25 when an abnormality occurs. Specific examples of the emergency stop means 35 include an abnormal operation such as a fall by connecting to the body of the subject M, including a pushbutton switch pressed by the subject M or an operator who operates the apparatus around the subject or a monitoring assistant. Examples include a magnet switch configured to drop off occasionally, a biological signal detection sensor that performs vital checks such as the heartbeat of the subject M, and sensors that detect abnormal operation of the drive mechanism, heat generation, and the like. As shown in FIG. 2, when an abnormality is detected by the emergency stop means 35, the detection result is transmitted to the swing control unit 22 as an abnormality signal, thereby stopping the driving of the board 25.

  As shown in FIG. 2, the control device 10 includes an electrical stimulation unit 40, an electrical stimulation control unit 41, and a myoelectric detection unit 50, and also includes a load standing oscillating motion device 21, an electrical stimulation unit 40, a muscle A main control unit 11 that controls the interlocking of the electric power detection means 50 and the like is provided. In addition, the control device 10 includes an output regulator 42 that adjusts the magnitude of the electrical stimulation output, the operation unit 12 that sets the stimulation conditions of the electrical stimulation, the timing of detection of myoelectricity, and the like. Connector portion 13 for connecting a stimulation conductor cord 44, a myoelectric detection conductor cord 52 of the myoelectric detection conductor 51, or a cable for transferring a signal input from the swing inversion detection means 24 to an external device. Etc. are provided.

  As shown in FIGS. 2 and 3, the electrical stimulation control means 41 receives the signal detected by the swing inversion detection means 24 and receives various stimulation conditions input from the operation unit 12 and the output regulator 42. The electrical stimulation means 40 outputs a pulsed electrical stimulation current to the electrical stimulation conductor 43 mounted on the trunk or lower limb of the subject M at a timing corresponding to the swinging of the board 25. The stimulation current is basically a bi-directional rectangular wave low-frequency pulse, but any frequency or waveform can be used as long as it can be output in pulses for the purpose of enhancing muscle strength. In addition, the specific example of the electrical stimulation of the present embodiment is that the basic stimulation frequency is 5.0 kHz, the stimulation frequency is 20 to 100 Hz, the stimulation intensity is 0 to 35 mA, the rise / fall time is 0 to 3 sec, and the energization time is 0. 1 to 3 sec, and can be adjusted within the range.

  The timing for outputting the electrical stimulation can be adjusted by the operation unit 12 at the same time as the inversion of the boarding board 25 or after a desired time has elapsed since the inversion time. It is possible to set the most effective timing in consideration of various conditions such as speed and strength. Specifically, the timing of the electrical stimulation output with respect to the detection signal of the rocking reversal detection means 24 can be adjusted in a range of −3 to +3 sec, and, for example, either the main muscle or the antagonist muscle is energized with respect to the reversal position of the boarding plate 25. It is configured to be adjustable. For example, if the boarding board 25 is adjusted so that the oscillation period is 0.5 Hz, the stimulation frequency of the electrical stimulation is 20 Hz, the stimulation time is 1 sec, and the stimulation pause time is 1 sec, it is synchronized with the rocking motion stimulation. And natural electrical stimulation becomes possible. Further, when the plus or minus of the timing of the electrical stimulus output with respect to the detection signal of the swing inversion detection means 24 is reversed, whether the main muscle that is greatly contracted by the swing stimulus or the opposite antagonist muscle is energized? Can be selected and adjusted. Note that it may be configured such that either the main muscle or the antagonist muscle can be energized, or whether the main muscle and the antagonist muscle are energized at the same time can be selected and set by the operation unit or the wireless remote controller.

  The myoelectric detection means 50 is a myoelectric detection conductor attached to the trunk or lower limb of the subject M in an arbitrary period after the energization by the electrical stimulation means 40 is stopped until the next energization is started. Myoelectricity is detected through 51. Specifically, as shown in FIG. 3, myoelectric detection is started after a desired time has elapsed from the end of pulse output between pulses output from the electrical stimulation means 40, and the next pulse output is started. Immediately before the detection of myoelectricity. Immediately after the electrical stimulation, the myoelectric waveform is superimposed as a whole, so that the myoelectricity can be detected ignoring the disturbance after the low-frequency output so that the myoelectricity can be detected after the desired time has elapsed since the end of the pulse output. It is configured to initiate detection. The detected myoelectric data is A / D converted and taken into the recording analysis device 60.

  As shown in FIG. 2, the electrical stimulation means 40 and the myoelectric detection means 50 are provided with a plurality of channels CH1 to CHn so that electrical stimulation and myoelectric detection can be performed on a plurality of target sites or muscles. In a specific example of this embodiment, the electrical stimulation conductor 43 and the myoelectric detection conductor 51 are both configured as a set of two electrodes, and each conductor is composed of an electrical stimulation conductor cord 44 or myoelectricity, respectively. The detection conductor cord 52 is connected to the connector portion 13 of the control device. In general, the electrical stimulation conductor 43 and the myoelectric detection conductor 51 are provided independently of each other. However, when the number of target parts increases, it takes time to install the conductor or the target muscles are compared. In order to solve the problem that the conductor cannot be mounted at an appropriate position when the size is small, any one of the electrodes of the electrical stimulation conductor 43 is also used as the electrode of the myoelectric detection conductor 51. It is desirable.

  As shown in FIG. 3, the timing of swing inversion, the pulse output of electrical stimulation, and the timing of detection of myoelectricity are controlled based on a basic clock 15 transmitted from the main control unit 11. The basic clock 15 is transmitted at the same time as the movement of the load standing oscillating motion device 21, that is, the driving of the boarding plate 25, but receives the first signal of the oscillating reversal detecting means 24. You may make it transmit from the time.

  As shown in FIG. 2, the recording analysis device 60 includes recording means 62 for recording various data such as myoelectricity obtained from the control device 10, and myoelectric waveform analysis means 63 for analyzing the recorded myoelectric data. A specific example is a personal computer 61. In the record analysis device 60, personal information for identifying the subject M, history of injury and illness, and the like are input and accumulated in advance, and the date and time of exercise, the intensity and number of exercise stimuli related to the subject M, the conditions and guidance of electrical stimulation, and the like. The child mounting site, various measurement results of the floor reaction force meter 71 and the motion analysis device 80 are also accumulated. In addition, it is configured to accumulate all information necessary for improvement and prevention of sarcopenia and dynapenia, including various data obtained from devices other than the component device of this embodiment, such as muscle strength measurement and various exercise ability tests. May be. Further, the recording analysis apparatus 60 is provided with an evaluation program, and comprehensively determines the accumulated information and analysis results, and evaluates the improvement degree of sarcopenia and dynapenia and the posture control ability.

  The electromyogram analysis means 63 can estimate the activity ratio of the slow muscle and the fast muscle from the analysis result. Specifically, when the recorded myoelectric waveform is subjected to frequency analysis using the Fourier transform or wavelet transform technique, the low frequency component is the slow muscle and the high frequency component is the fast muscle activity. Reflected. The integrated value of the myoelectric waveform reflects the muscle mass.

  If necessary, a floor reaction force meter 71 for measuring the floor reaction force of the subject M who has boarded the load standing and oscillating motion device 21 and a motion analysis device 80 for kinematically analyzing the posture control status are provided. Also good. Data obtained from the floor reaction force meter 71 and the motion analysis device 80 is sent to the recording analysis device 60 and stored in the recording means 62 for use in various analyzes and evaluations.

  For example, the floor reaction force meter 71 is provided on the boarding plate 25 of the load standing swing motion device 21. The floor reaction force meter 71 detects the magnitude of the floor reaction force of the left and right limbs and the temporal change in the three-dimensional direction, and the obtained data is transmitted to the recording analysis device 60 and stored in the recording means 62.

  In addition, the motion analysis device 80 mainly includes a plurality of cameras that capture, as images, a marker that is attached to a predetermined part of the subject M and a posture control status of the subject M that is provided in the vicinity of the load standing swing motion device 21. 81 and an operation analysis program 82 that numerically analyzes the temporal change of the marker from the image data obtained from the camera 81 incorporated in the recording analysis device 60. By reflecting the data obtained from the motion analysis program 82 in the musculoskeletal simulation program 85 incorporated in the recording analysis device 60 and analyzing the change of the marker over time, the posture control status of the subject M is continuously changed. It can be quantified as a general change and its characteristics can be grasped.

  Examples of features grasped by the motion analysis device 80 include a three-dimensional analysis of center of gravity swing, a center of gravity swing, a head swing, a cooperative pattern of hip and ankle joints, regularity of center of gravity swing, Evaluate the regularity of shaking, the Hurst exponent of shaking of the center of gravity, the Hurst exponent of shaking of the head, etc. It is also possible to obtain and evaluate a general center of gravity fluctuation trajectory length and the like. For example, when the data obtained from the motion analysis device 80 is reflected in the musculoskeletal simulation program 85, the movement of each joint position of the subject and the positional relationship of the skeleton are elucidated from the position of the marker. When the center of gravity of each part is clarified by reflecting the weight of each part of the body, the total center of gravity of the subject is obtained, and as a result, three-dimensional motion analysis of the center of gravity can be performed.

  Further, by reflecting the data of the floor reaction force meter 71 and the motion analysis device 80 in the musculoskeletal simulation program 85, the contraction state of each muscle can be simulated according to the posture control operation of the subject M. Good. Specifically, the joint moment (torque) of each joint is obtained from the positional relationship between the position data of each joint of the subject clarified by the musculoskeletal simulation program 85 and the floor reaction force data obtained from the floor reaction force meter 71. Based on this, muscle tension is calculated by performing a simulation (inverse dynamic analysis) using a numerical optimization method.

  It is possible to evaluate muscle quality and determine posture control ability by comprehensively interpreting the muscle contraction simulation results and myoelectric analysis results obtained in this way for posture control. It can be expected that the improvement and prevention of exercise and the verification of the effect of exercise combined with electrical stimulation will be performed.

  Note that the wireless remote controller 9 may be configured to remotely operate the floor reaction force meter 71 and the motion analysis device 80 in addition to the load standing swing motion device 21 and the control device 10. That is, it is configured so that the wireless remote controller 9 can simultaneously start and stop exercise stimulation, electrical stimulation, myoelectric measurement, floor reaction force, operation analysis device 80, and measurement start and stop via the main control unit 11 of the control device 10. In addition to reducing the operational effort of multiple devices, it is possible to correlate all of the data of motion stimulation and electrical stimulation action status, myoelectric measurement, floor reaction force and posture control data in time series. Data analysis and muscle quality and posture control ability can be easily evaluated. Furthermore, the emergency stop means 35 described above may also be provided in the wireless remote controller 9 so that the load standing oscillating motion device 21, the electrical stimulation means 40, and the like can be urgently stopped when an abnormality occurs.

  Next, operation | movement of the muscular strength augmentation system 1 which concerns on the Example of this invention is demonstrated.

  Turn on the power of the devices to be used in advance. After that, various conditions for exercise stimulation are set. In this embodiment, the swing frequency, swing stroke, training time, etc. of the board 25 can be set as the motion stimulation conditions.

  Set various conditions for electrical stimulation. In this embodiment, as the electrical stimulation conditions, in addition to the time from the inversion timing of the boarding board 25 to the electrical stimulation output, the energization time, the rise / fall time, the stimulation frequency, and the like can be set.

  Set various conditions for EMG measurement. In the present embodiment, in addition to the time from when the output of electrical stimulation is stopped until the start of myoelectric measurement, the myoelectric measurement time, gain, ham filter, cutoff frequency, and the like can be set.

  In addition, when performing floor reaction force measurement and motion analysis as necessary, measurement conditions and the like of these devices are set.

  The electrical stimulation conductor 43 and the myoelectric detection conductor 51 are attached to the target site of the subject M. In order to prevent the conductor from dropping off due to vibration during movement, the conductor may be fixed with a band or clothing. In addition, when utilizing the motion analysis apparatus 80, a marker is attached to a predetermined part of the subject M.

  In order to prevent a fall accident, the subject 33 is equipped with the equipment 33, the subject M is placed on the board 25 of the load standing swing motion device 21, and the belt portion 34 of the equipment 33 is connected to the suspension portion 31. At this time, the length of the belt portion 34 is adjusted so that the muscle contraction related to the posture control of the subject M is not affected.

  After confirming that the electrical stimulation output adjustment knob 42 of the control device 10 is zero, the electrical stimulation conductor 43 is the electrical stimulation conductor cord 44 and the myoelectric detection conductor 51 is the myoelectric sensor. The detection conductor cord 52 is connected to the connector portion 13 of the control device 10, and the output adjustment knob 42 is turned to the extent that proper muscle contraction is obtained while checking whether the subject M has strong pain, and the output of the electrical stimulation is performed. Adjust. More specifically, the stimulation current for output confirmation is output in a magnitude corresponding to the operation amount of the output adjustment knob 42. When the output adjustment knob 42 starts to be turned, the stimulation current for output confirmation is Energization is started, and thereafter, energization is stopped when a predetermined time elapses after the operation of the output adjustment knob 42 is stopped. By performing this operation several times, the output can be adjusted so as to obtain an appropriate output. As a specific example to reduce the output adjustment effort, at the start of output adjustment, if you want to adjust the output level depending on the part after adjusting the output of multiple connected channels all at the same time and adjusting it once May be configured to select and individually adjust the channel to which the conductor attached to the target site is connected.

  The wireless remote controller 9 is operated to start exercise and measurement. When this operation is performed, the drive mechanism portion 26 of the load standing swing motion device 21 is actuated to start swinging of the boarding plate 25. When the boarding plate 25 is reversed, the swinging reversal detecting means 24 causes the boarding plate 25 to move. The timing of inversion is detected. When this signal is transmitted to the control device 10, the electrical stimulation is output after the set predetermined time has elapsed, and the myoelectric measurement is started after the predetermined time has passed. The swing of the board 25 is controlled by the swing control unit 22, and the timing of the electrical stimulation output and the myoelectric measurement is controlled by the main control unit 11 based on preset conditions.

  During exercise, when the exercise stimulus of the load standing and oscillating motion device 21 acts on the subject M, the slow muscle with high fatigue resistance acts actively when the required contraction force is low for posture control, When a high contraction force is required, it acts in a pattern called a recruitment characteristic in which fast muscles that tend to get tired participate, while the contraction force is large. On the other hand, when electrical stimulation acts, fast muscles governed by thick nerves are first stimulated to contract, and a reverse recruitment phenomenon that causes muscle fatigue occurs even with a low contraction force. When an exercise stimulus and an electrical stimulus are applied simultaneously, both slow and fast muscles are activated even if the stimulus level (ie, exercise load) is low, resulting in a synergistic and efficient exercise stimulus. This exercise, even for elderly people, is a longitude stimulus that can be carried out safely and easily without effort, and can perform an effective exercise, which can be expected to improve and prevent sarcopenia and dynapenia.

  EMG measurement is performed between the pulses of electrical stimulation. Based on the basic clock 15, the main control unit 11 outputs a pulsed electrical stimulus in accordance with the timing of the reversal of oscillation, and measures the electromyogram until the next pulse is output. The stimulation means 40 and the myoelectric detection means 50 are controlled.

  The reversal timing of the boarding board 25 detected by the rocking reversal detection means 24, the output status of the electrical stimulation, and the electromyogram measurement results are transmitted to the recording analysis device 60 and stored in association with each other in time series. When the floor reaction force meter 71 and the motion analysis device 80 are also measured, the measurement data is similarly stored in the recording analysis device 60. These data are accumulated until the training time is over.

  When the training time is over, the operation and measurement of various devices are also finished at the same time. After the training time, the myoelectric waveform analysis means 63 of the recording analysis device 60 analyzes the myoelectric waveform to analyze the rate of activity of the fast and slow muscles of the target muscle, and integrates the myoelectric waveform to obtain the muscle. Analyze the quantity. Further, the posture control analysis means 70 analyzes a posture control situation such as three-dimensional center-of-gravity shaking from data obtained from the floor reaction force meter and the motion analysis device. This analysis result is input to the evaluation program 90, and posture control ability and muscle quality are evaluated. The evaluation results are output from the evaluation program 90 and displayed / accumulated by the recording analysis device 60.

  This exercise and measurement is performed for a certain period of time until the improvement of the muscle quality of the subject M before the start of training is achieved. The evaluation program 90 verifies the degree of improvement and the exercise effect of sarcopenia and dynapenia by comparing and evaluating the data and evaluation results accumulated during this period over time or by comparing and evaluating with a healthy person.

  In the above evaluation, especially by measuring and analyzing the myoelectricity of muscles that exercise and electrical stimuli act simultaneously, and estimating the rate of activity of slow and fast muscles when exercise and electrical stimuli act simultaneously If the effect of electrical stimulation combined exercise can be verified from the aspect of muscle quality evaluation, and the verification of the effect supports the effect of electrical stimulation combined exercise on sarcopenia and dynapenia, improvement of sarcopenia and dynapenia And prevention can be performed objectively.

  It goes without saying that the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. For example, the load standing swinging exercise device 21 is adopted as an example for applying the exercise stimulus, but this is for the subject M to strengthen the muscular strength without making an effort himself. It is good also as for the exercise | movement performed by the rehabilitation for the purpose of muscular strength reinforcement | strengthening, and various exercises in general regardless of not using exercise equipment, such as walking, the strength training, such as squat. In that case, various switches, sensors for detecting acceleration, joint angles, loads, etc., or markers used for motion analysis, etc. are carried or attached to the subject M, and the action status of the motion stimulus is detected in real time. Also good. Moreover, if it is the exercise | movement which uses an apparatus, you may make it detect by providing sensors, such as a load, an acceleration, and light, which can detect the action | operation of the apparatus to be used as a physical change amount.

  Furthermore, the myoelectric detection itself can be used as the motion stimulus detection means 23. That is, it is also possible to detect myoelectricity that muscle contraction has been started by an exercise stimulus, and to control electrical stimulation, floor reaction force, and motion analysis according to this signal.

  The object of the present invention can also be achieved by replacing myoelectric measurement with myophone measurement.

  INDUSTRIAL APPLICABILITY The present invention can be applied as a muscular strength augmentation system for verifying the effect of exercise combined with electrical stimulation and for improving and preventing sarcopenia and dynapenia.

M test subject 1 muscle strength augmentation system 10 control device 11 main control unit 21 load standing swing motion device 40 electrical stimulation means 50 myoelectric detection means 60 recording analysis device 63 myoelectric waveform analysis means 70 posture control analysis means

Claims (4)

A motion stimulus detection means for detecting the action status of the motion stimulus on the subject;
Electrical stimulation means for energizing a stimulation current to the muscle of a subject that contracts due to exercise stimulation;
Electrical stimulation control means for controlling the output of the electrical stimulation means in accordance with a signal from the motion stimulation detection means;
Myoelectric detection means for detecting myoelectricity of a subject in an arbitrary period from when the energization by the electrical stimulation means is stopped to when energization is started next;
A muscle strengthening system characterized by comprising. EMG waveform analysis means for analyzing the detected EMG waveform is provided,
The muscle strength augmentation system according to claim 1, wherein a ratio of fast muscle and slow muscle activity is estimated from an analysis result by the electromyogram analyzing means. A board on which the subject boarded,
A drive mechanism for swinging the boarding plate;
Swing inversion detection means for detecting the timing of the inversion of the boarding plate swing;
A load standing swing motion device comprising a swing control section for controlling the drive mechanism section;
The load standing oscillating motion device applies a motion stimulus to a subject,
The muscular strength augmentation system according to claim 1 or 2, wherein a timing of reversal of the swing of the boarding board is detected by the swing reversal detection means as a motion stimulation action situation. The muscular strength augmentation system according to claim 3 provided with posture control analysis means which judges a subject's posture control ability.

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