Muscle fatigue resistance electrical stimulation method based on asymmetric random high-frequency carrier pulse cluster

Abstract

The invention relates to the technical field of electrical stimulation, in particular to a muscle fatigue resistance electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, and the method comprises the following steps: determining a stimulation site, pasting a stimulation electrode, and connecting the stimulation electrode with electrical stimulation equipment; setting parameters of an asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; implementing asymmetric random high-frequency carrier pulse cluster electrical stimulation; the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode is composed of a plurality of positive narrow pulses with randomly fluctuating amplitudes and a negative wide pulse; when the narrow pulse width and the narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set, each narrow pulse has a carrier frequency higher than kilohertz. According to the method provided by the invention, the problems of rapid reduction of contractility caused by muscle fatigue in the electrical stimulation process and strong pain and discomfort caused by high-frequency electrical stimulation can be effectively relieved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical stimulation, and in particular to an anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters. Background Art

[0002] Neuromuscular Electrical Stimulation (NMES) is a technique that uses electrical pulses to stimulate nerves or muscles to induce functional muscle contraction. Electrical stimulation therapy can enhance muscle strength and expand the range of motion of limbs. Therefore, it is widely used in motor function rehabilitation of patients with neurological diseases or injuries (stroke, spinal cord injury, etc.). However, in neuromuscular electrical stimulation technology, due to the highly synchronized activation of motor units and the non-physiological recruitment of muscle fibers, the stimulated muscles are prone to fatigue, resulting in a rapid decrease in induced strength, which limits clinical application.

[0003] In terms of relieving muscle fatigue, compared with traditional muscle belly motor point stimulation, electrical stimulation of the proximal peripheral nerve bundle has been shown to reduce muscle fatigue by activating different muscle fibers. Compared with traditional low-frequency electrical stimulation, high-frequency (kilohertz) carrier pulse cluster electrical stimulation waveforms have been shown to significantly relieve muscle fatigue, that is, replacing the rectangular pulses in traditional electrical stimulation with narrow pulse clusters with very small pulse widths. The basic principle is that each narrow pulse can only provide subthreshold stimulation to the axon, and the axon needs to accumulate multiple consecutive narrow pulses to gradually reach the threshold. Different axons require different numbers of narrow pulses, thereby reducing the synchronization of activation of different axons. However, the anti-fatigue effect of these methods is still limited.

[0004] In addition, in order to avoid local skin burns and ensure the balance of positive and negative charges injected by the anode / cathode, the traditional electrical stimulation waveform is usually a symmetrical biphasic pulse. The cathode pulse can induce effective muscle contraction, and the anode pulse is used to balance the charge, but it will activate the pain receptors in the skin due to the high current intensity, causing discomfort to the user. Since the sensory threshold is inversely proportional to the stimulation frequency, the sensory threshold under high-frequency electrical stimulation is lower than that under traditional low-frequency electrical stimulation, which causes stronger discomfort and is not conducive to long-term electrical stimulation treatment. Summary of the invention

[0005] The embodiment of the present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, which can significantly relieve muscle fatigue and greatly reduce discomfort such as pain while ensuring that the subject's muscles reach the target contraction level.

[0006] To solve the above technical problems, an embodiment of the present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, the method comprising the following steps: first, determining the stimulation site and pasting the stimulation electrode, and connecting the stimulation electrode to the electrical stimulation device; then, setting the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters; finally, implementing the asymmetric random high-frequency carrier pulse cluster electrical stimulation; the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode is composed of a number of positive narrow pulses with randomly fluctuating amplitudes and a negative wide pulse; wherein the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters include stimulation frequency, narrow pulse width, narrow pulse interval, forward current intensity and number of narrow pulses; when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each narrow pulse has a carrier frequency higher than kilohertz.

[0007] In some exemplary embodiments, determining the stimulation site and attaching the stimulation electrodes, and connecting the stimulation electrodes to the electrical stimulation device, includes the following steps: first, determining the stimulation site according to usage requirements; then, cleaning the skin at the stimulation site to reduce contact impedance; finally, attaching several stimulation electrodes at the stimulation site, and connecting all the stimulation electrodes to the cathode and anode of the output channel of the electrical stimulation device.

[0008] In some exemplary embodiments, setting the parameters of an asymmetric random high-frequency carrier pulse cluster electrical stimulation mode includes the following steps: first, setting the stimulation frequency parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; then, setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; finally, setting the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

[0009] In some exemplary embodiments, when setting the stimulation frequency parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each pulse cluster includes several positive phase narrow pulses with a kilohertz-level carrier frequency and randomly fluctuating amplitudes, and a negative wide pulse to ensure the balance of positive and negative charges and reduce the sensation of pain; the transmission frequency of the pulse cluster is 30Hz to 50Hz.

[0010] In some exemplary embodiments, the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set, including the following steps: setting the narrow pulse width, each narrow pulse of the mode has a pulse width of 60us to 120us, providing subthreshold stimulation to the axon; setting the narrow pulse interval, the narrow pulses have a pulse interval of 10us to 30us, so as to appropriately extend the time for the axon to reach the threshold.

[0011] In some exemplary embodiments, each narrow pulse of the mode has a pulse width of 80 us, and a pulse interval of 20 us between the narrow pulses.

[0012] In some exemplary embodiments, when the forward current intensity and the number of narrow pulses of an asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set, moderate muscle contraction is induced in the user; the amplitude of the forward narrow pulses of this mode is a random sequence uniformly distributed within a certain range around the set forward current intensity.

[0013] In some exemplary embodiments, the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set, including the following steps: measuring the user's maximum voluntary contraction force and calculating the moderate contraction level; adjusting the forward current intensity and the number of narrow pulses to induce moderate muscle contraction in the user; the amplitude of the positive narrow pulse is a random sequence uniformly distributed within a certain range around the set forward current intensity to increase the time delay for different axons to reach the threshold; finally, calculating the negative pulse amplitude.

[0014] In some exemplary embodiments, the calculation formula for the negative pulse amplitude is:

[0015]

[0016] Among them, An is the amplitude of negative pulse; n is the number of positive narrow pulses; Ap is i is the amplitude of the ith positive narrow pulse actually generated; P w is the width of the positive narrow pulse; F is the pulse cluster frequency; P i It is the positive narrow pulse interval.

[0017] In some exemplary embodiments, asymmetric random high-frequency carrier pulse cluster electrical stimulation is implemented, including the following steps: using a fixing device to fix the stimulation electrode to prevent the stimulation electrode from falling off during the stimulation process, and to make the stimulation electrode and human tissue in close contact to enhance the stimulation effect; outputting the set asymmetric random high-frequency carrier pulse cluster current, and continuing the electrical stimulation for several minutes.

[0018] The technical solution provided by the embodiments of the present application has at least the following advantages:

[0019] The embodiment of the present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, and the method includes the following steps: first, determining the stimulation site and pasting the stimulation electrode, and connecting the stimulation electrode to the electrical stimulation device; then, setting the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters; finally, implementing the asymmetric random high-frequency carrier pulse cluster electrical stimulation; the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode is composed of a number of positive narrow pulses with randomly fluctuating amplitudes and a negative wide pulse; wherein the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters include stimulation frequency, narrow pulse width, narrow pulse interval, positive current intensity and number of narrow pulses; when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each narrow pulse has a carrier frequency higher than kilohertz.

[0020] On the one hand, the anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters proposed in this application can significantly alleviate the muscle fatigue problem caused by long-term electrical stimulation. Compared with the prior art, the present application significantly reduces the muscle fatigue rate under continuous stimulation, which is specifically manifested in slower force decay, smaller absolute force decay, greater platform force, and ultimately greater force output, which is conducive to users performing high-intensity continuous electrical stimulation exercise rehabilitation training. On the other hand, the anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters proposed in this application can significantly reduce the discomfort of the subject such as pain. This application takes into account that the electrical stimulation waveform usually adopts symmetrical bidirectional pulses, in which the invalid pulses used for charge balance will activate the pain receptors in the skin due to the high current intensity, causing discomfort to the user. The asymmetric electrical stimulation waveform proposed in this application, while maintaining the normal induction of muscle force by the effective pulse, reduces the current intensity of the invalid pulse and increases the pulse width of the invalid pulse. Compared with the prior art, it greatly reduces the user's discomfort and enhances the user's experience during electrical stimulation treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplifications do not constitute limitations on the embodiments. Unless otherwise stated, the pictures in the drawings do not constitute proportional limitations.

[0022] Figure 1 A schematic flow chart of an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster provided in an embodiment of the present application.

[0023] Figure 2 A specific flow chart of the anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters provided in an embodiment of the present application.

[0024] Figure 3 A schematic diagram of an asymmetric random high-frequency carrier pulse cluster electrical stimulation mode provided in an embodiment of the present application.

[0025] Figure 4 A schematic diagram of the change in muscle contraction force over time during an electrical stimulation process provided in an embodiment of the present application.

[0026] Figure 5 This is a schematic diagram of the pain score of a user during electrical stimulation provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] As can be seen from the background technology, the existing transcutaneous neuromuscular electrical stimulation technology has technical problems such as easy muscle fatigue and high discomfort.

[0028] In order to solve the above technical problems, the embodiment of the present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, the method comprising the following steps: first, determine the stimulation site and paste the stimulation electrode, and connect the stimulation electrode to the electrical stimulation device; then, set the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters; finally, implement the asymmetric random high-frequency carrier pulse cluster electrical stimulation; the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode is composed of a number of positive narrow pulses with random amplitude fluctuations and a negative wide pulse; wherein the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters include stimulation frequency, narrow pulse width, narrow pulse interval, positive current intensity and number of narrow pulses; when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each narrow pulse has a carrier frequency higher than kilohertz. The present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, which reduces the synchronization of axon activation through effective pulses with random amplitude fluctuations, effectively relieves muscle fatigue, and reduces the user's discomfort by reducing the current intensity of invalid pulses, thereby helping to promote the widespread application of electrical stimulation technology in the clinical rehabilitation of stroke patients.

[0029] The following will describe the various embodiments of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present application, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in the present application can be implemented.

[0030] See also Figure 1 , an embodiment of the present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, the method comprising the following steps:.

[0031] Step S1, determine the stimulation site and stick the stimulation electrode, and connect the stimulation electrode to the electrical stimulation device.

[0032] Step S2, setting the parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

[0033] Step S3, implementing asymmetric random high-frequency carrier pulse cluster electrical stimulation.

[0034] Among them, in step S2, the parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode include stimulation frequency, narrow pulse width, narrow pulse interval, forward current intensity and number of narrow pulses; when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each narrow pulse has a carrier frequency higher than kilohertz.

[0035] See also Figure 2 , which is a specific flow chart of the anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters of this application. The method includes: pasting electrodes and connecting electrical stimulation equipment; setting asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters; implementing asymmetric random high-frequency carrier pulse cluster electrical stimulation. The present application can effectively alleviate the problem of rapid decrease in contractile force induced by muscle fatigue during electrical stimulation and strong pain and discomfort caused by high-frequency electrical stimulation. It can randomize the effective pulse amplitude so that the difference in the number of narrow pulses required for different axons to reach the threshold becomes larger, thereby increasing the time delay for different axons to reach the threshold, effectively slowing down the muscle fatigue rate; at the same time, by reducing the invalid pulse amplitude, it significantly reduces the discomfort during the stimulation process, which is helpful for the promotion and application of electrical stimulation technology in clinical practice.

[0036] Specifically, when pasting electrodes and connecting the electrical stimulation device, first determine the stimulation site and paste a number of stimulation electrodes, and connect them to the cathode and anode of the output channel of the electrical stimulation device; set the parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode consists of a number of positive narrow pulses with randomly fluctuating amplitudes and a negative wide pulse; wherein the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters include stimulation frequency, narrow pulse width, narrow pulse interval, positive current intensity and number of narrow pulses; first set the stimulation frequency, the stimulation frequency of the mode is 30Hz~50Hz; when setting the asymmetric random When the narrow pulse width and interval of the high-frequency carrier pulse cluster electrical stimulation mode are set, each narrow pulse of the mode has a carrier frequency higher than kilohertz, that is, each narrow pulse has a pulse width of about 100us, and there is a pulse interval of about 20us between narrow pulses; then, the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set to induce moderate muscle contraction in the user, and the forward narrow pulse amplitude of the mode is a random sequence uniformly distributed within a certain range around the set forward current intensity; finally, continuous electrical stimulation is applied based on the set asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

[0037] In some embodiments, determining the stimulation site and attaching the stimulation electrode in step S1, and connecting the stimulation electrode to the electrical stimulation device, includes the following steps:

[0038] Step S101, determining the stimulation site according to usage requirements.

[0039] Step S102: Clean the skin at the stimulation site to reduce contact impedance.

[0040] Step S103: Paste a number of stimulation electrodes at the stimulation site, and connect all the stimulation electrodes to the cathode and anode of the output channel of the electrical stimulation device.

[0041] Specifically, in the above step S101, in some embodiments, the area below the short head of the biceps brachii on the inner side of the upper arm can be selected as the stimulation site, which is a location where peripheral nerve bundles (median nerve and ulnar nerve) are enriched.

[0042] In the above step S102, medical scrub and alcohol cotton pads may be used to clean the skin at the irritated area.

[0043] In the above step S103, in some embodiments, a plurality of electrodes may be arranged into an array (such as a 2×4 or 2×8 electrode array), and the selectivity of the electrical stimulation output may be improved by switching the electrode pair combination.

[0044] In some embodiments, setting the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters in step S2 includes the following steps:

[0045] Step S201, setting stimulation frequency parameters of an asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

[0046] Step S202, setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

[0047] Step S203, setting the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

[0048] In some embodiments, when setting the stimulation frequency parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode in step S201, each pulse cluster includes several positive phase narrow pulses with kilohertz-level carrier frequencies and random amplitude fluctuations, and a negative wide pulse to ensure the balance of positive and negative charges and reduce pain sensation; the transmission frequency of the pulse cluster is 30Hz to 50Hz.

[0049] In some embodiments, setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode in step S202 includes the following steps:

[0050] Step S2021, setting the narrow pulse width. Each narrow pulse in this mode has a pulse width of 60us to 120us, providing subthreshold stimulation to the axon.

[0051] Step S2022, setting a narrow pulse interval, wherein the narrow pulses have a pulse interval of 10us to 30us, so that the time for the axon to reach the threshold is appropriately prolonged.

[0052] In some embodiments, each narrow pulse of the mode in step S202 has a pulse width of 80 us, and there is a pulse interval of 20 us between the narrow pulses.

[0053] In some embodiments, when the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set in step S203, moderate muscle contraction is induced in the user, and the amplitude of the forward narrow pulses of this mode is a random sequence uniformly distributed within a certain range around the set forward current intensity.

[0054] In some embodiments, setting the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode in step S203 includes the following steps:

[0055] Step S2031, measuring the user's Maximum Voluntary Contraction Force (MVC), and calculating the moderate contraction level.

[0056] Step S2032: Adjust the forward current intensity and the number of narrow pulses to induce moderate muscle contraction in the user.

[0057] Step S2033: The amplitude of the forward narrow pulse is a random sequence uniformly distributed within a certain range around the set forward current intensity, so as to increase the time delay for different axons to reach the threshold value.

[0058] Step S2034, calculating the negative pulse amplitude.

[0059] In some embodiments, the calculation formula of the negative pulse amplitude in step S2034 is:

[0060]

[0061] Among them, An is the amplitude of negative pulse; n is the number of positive narrow pulses; Ap is i is the amplitude of the ith positive narrow pulse actually generated; P w is the width of the positive narrow pulse; F is the pulse cluster frequency; P i It is the positive narrow pulse interval.

[0062] See also Figure 3, is a pulse structure diagram of the anti-muscle fatigue electrical stimulation mode based on asymmetric random high-frequency carrier pulse clusters in this application. Each pulse cluster contains n positive phase narrow pulses, and different pulse clusters are emitted at a certain frequency. To ensure the balance of positive and negative charges, the negative phase current amplitude is determined by the ratio of the total charge of the positive phase pulse to the duration of the negative phase pulse. The specific parameters are as follows:

[0063] In the above step S201, when setting the stimulation frequency parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, the pulse cluster sending frequency can be set to 40 Hz, because this frequency is close to the discharge rate of motor neurons during autonomous activation.

[0064] In the above step S202, when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, the forward narrow pulse width can be set to 80 μs and the interval to 20 μs, that is, the carrier frequency is 10 kHz.

[0065] In the above step S2032, when setting the forward current intensity and the number of narrow pulses, the forward current intensity and the number of narrow pulses n are adjusted to induce about 30% MVC contraction force, and each pulse cluster is set to 14 positive phase narrow pulses with amplitudes randomly fluctuating around 4.15 mA.

[0066] In the above step S2034, when calculating the negative pulse amplitude, the negative pulse amplitude is calculated to be about 0.19 mA and the pulse width is 23.6 ms according to the set parameters and formula.

[0067] In some embodiments, the asymmetric random high-frequency carrier pulse cluster electrical stimulation is implemented in step S3, comprising the following steps:

[0068] Step S301: fix the stimulation electrode using a fixing device to prevent the stimulation electrode from falling off during the stimulation process, and make the stimulation electrode in close contact with human tissue to improve the stimulation effect.

[0069] Step S302: output the set asymmetric random high-frequency carrier pulse cluster current, and continue the electrical stimulation for several minutes.

[0070] Specifically, in the above step S301, a fixing device such as a clamp may be used to fix the stimulation electrode.

[0071] In the above step S302, it can be set to continuously output asymmetric random high-frequency carrier pulse cluster electrical stimulation for 5 minutes.

[0072] In order to verify the anti-fatigue property of the method proposed in this embodiment, the muscle contraction force data was used to evaluate the ability of the proposed method to relieve muscle fatigue. The stimulation duration applied in this embodiment was 5 minutes, and the initial contraction force induced was 30% MVC. The traditional method and the method proposed in this application were used for comparison, and the muscle strength results were as follows: Figure 4 As shown, pain scores were Figure 5 shown.

[0073] in, Figure 4 Each point in the figure is the average contraction force within 10 seconds. The blue color shows the muscle force variation over time of the traditional high-frequency stimulation method, and the red color shows the muscle force variation over time of the stimulation method proposed in this application. Figure 4 It can be seen that the method proposed in this embodiment significantly reduces the muscle fatigue rate and slows down the degree of muscle strength decay over time.

[0074] in, Figure 5 The middle is the statistical result of the NRS pain numerical score (ranging from 0 to 10 points, where 0 is no pain and 10 is severe pain) given by the users under the two stimulation methods, the blue is the pain score result of the traditional high-frequency stimulation method, and the yellow is the pain score result of the stimulation method proposed in this application. Figure 5 It can be seen that the method proposed in this embodiment significantly reduces the pain level of the user.

[0075] The present application randomizes the effective pulse amplitude so that the difference in the number of narrow pulses required for different axons to reach the threshold becomes larger, thereby increasing the time delay for different axons to reach the threshold and effectively slowing down the rate of muscle fatigue; at the same time, by reducing the invalid pulse amplitude, the discomfort during the stimulation process is significantly reduced.

[0076] Based on the above technical scheme, an embodiment of the present application provides an anti-muscle fatigue electrical stimulation method based on an asymmetric random high-frequency carrier pulse cluster, and the method includes the following steps: first, determine the stimulation site and paste the stimulation electrode, and connect the stimulation electrode to the electrical stimulation device; then, set the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters; finally, implement asymmetric random high-frequency carrier pulse cluster electrical stimulation; the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode is composed of a number of positive narrow pulses with randomly fluctuating amplitudes and a negative wide pulse; wherein, the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode parameters include stimulation frequency, narrow pulse width, narrow pulse interval, forward current intensity and number of narrow pulses; when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each narrow pulse has a carrier frequency higher than kilohertz.

[0077] On the one hand, the anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters proposed in this application can significantly alleviate the muscle fatigue problem caused by long-term electrical stimulation. Compared with the prior art, the present application significantly reduces the muscle fatigue rate under continuous stimulation, which is specifically manifested in slower force decay, smaller absolute force decay, greater platform force, and ultimately greater force output, which is conducive to users performing high-intensity continuous electrical stimulation exercise rehabilitation training. On the other hand, the anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters proposed in this application can significantly reduce the pain and other discomfort of the subject. This application takes into account that the electrical stimulation waveform usually adopts symmetrical bidirectional pulses, in which the invalid pulses used for charge balance will activate the pain receptors in the skin due to the high current intensity, causing discomfort to the user. The asymmetric electrical stimulation waveform proposed in this application, while maintaining the normal induction of muscle force by the effective pulse, reduces the current intensity of the invalid pulse and increases the pulse width of the invalid pulse. Compared with the prior art, it greatly reduces the user's discomfort and enhances the user's experience during electrical stimulation treatment.

[0078] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for implementing the present application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present application. Any person skilled in the art can make their own changes and modifications without departing from the spirit and scope of the present application, so the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. An anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters, characterized in that: The following steps are involved: Determine the stimulation site and attach the stimulation electrode, and connect the stimulation electrode to the electrical stimulation device; Set the parameters of asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; Implement asymmetric random high-frequency carrier pulse burst electrical stimulation; The asymmetric random high-frequency carrier pulse cluster electrical stimulation mode is composed of several positive narrow pulses with randomly fluctuating amplitudes and one negative wide pulse; wherein, the parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode include stimulation frequency, narrow pulse width, narrow pulse interval, forward current intensity and number of narrow pulses; when setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each narrow pulse has a carrier frequency higher than kilohertz.

2. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 1, characterized in that: The method of determining the stimulation site and attaching the stimulation electrode, and connecting the stimulation electrode to the electrical stimulation device, comprises the following steps: Determine the stimulation site based on usage requirements; Cleaning the skin at the stimulation site to reduce contact impedance; Several stimulation electrodes are pasted at the stimulation site, and all the stimulation electrodes are connected to the cathode and anode of the output channel of the electrical stimulation device.

3. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 1, characterized in that: The method of setting the parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode comprises the following steps: Set the stimulation frequency parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; Setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode; Set the forward current intensity and number of narrow pulses in the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode.

4. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 3, characterized in that: When setting the stimulation frequency parameters of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode, each pulse cluster includes several positive phase narrow pulses with kilohertz-level carrier frequencies and randomly fluctuating amplitudes, and a negative wide pulse to ensure the balance of positive and negative charges and reduce pain sensation; the transmission frequency of the pulse cluster is 30Hz to 50Hz.

5. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 3, characterized in that: The method of setting the narrow pulse width and narrow pulse interval of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode comprises the following steps: Setting a narrow pulse width, wherein each narrow pulse in the mode has a pulse width of 60us to 120us, providing subthreshold stimulation to the axon; The narrow pulse interval is set to have a pulse interval of 10us to 30us, so that the time for the axon to reach the threshold is appropriately prolonged.

6. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 5, characterized in that: Each narrow pulse in the mode has a pulse width of 80 us, and a pulse interval of 20 us is provided between the narrow pulses.

7. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 3, characterized in that: When the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode are set, moderate muscle contraction of the user is induced; the forward narrow pulse amplitude of the mode is a random sequence uniformly distributed within a certain range around the set forward current intensity.

8. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 7, characterized in that: The method of setting the forward current intensity and the number of narrow pulses of the asymmetric random high-frequency carrier pulse cluster electrical stimulation mode comprises the following steps: Measure the user's maximum voluntary contraction force and calculate the moderate contraction level; Adjust the forward current intensity and the number of narrow pulses to induce moderate muscle contraction in the user; The amplitude of the forward narrow pulse is a random sequence uniformly distributed within a certain range around the set forward current intensity, so as to increase the time delay of different axons reaching the threshold; Calculate the amplitude of negative-going pulses.

9. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 8, characterized in that: The calculation formula of the negative pulse amplitude is: Among them, An is the amplitude of negative pulse; n is the number of positive narrow pulses; Ap is i is the amplitude of the ith positive narrow pulse actually generated; P w is the width of the positive narrow pulse; F is the pulse cluster frequency; P i It is a positive narrow pulse interval.

10. The anti-muscle fatigue electrical stimulation method based on asymmetric random high-frequency carrier pulse clusters according to claim 1, characterized in that: The implementation of asymmetric random high-frequency carrier pulse cluster electrical stimulation comprises the following steps: Use a fixing device to fix the stimulation electrode to prevent it from falling off during stimulation, and make the stimulation electrode in close contact with human tissue to improve the stimulation effect; The output is a set asymmetric random high-frequency carrier pulse train current, which lasts for several minutes.

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