A method for local magnetic field enhancement in free space based on muscle strength enhancement

Abstract

The present application relates to the technical field of magnetic field enhancement, in particular to a local magnetic field enhancement method in free space based on muscle strength enhancement. The method comprises: establishing a free space for implementing resistance training; determining a local muscle strength enhancement part; determining a target magnetic field required according to the local muscle strength enhancement part; establishing a uniform magnetic field in the free space; applying a local magnetic field enhancement unit at the local muscle strength enhancement part, thereby realizing local magnetic field enhancement, synchronous implementation of resistance training and magnetic field stimulation, and further realizing muscle strength enhancement. The present application provides a local magnetic field enhancement method in free space based on muscle strength enhancement, which can greatly reduce the implementation cost, effectively reduce the heat of the coil, and provide a guarantee for the feasibility of synchronous implementation of resistance training and magnetic field stimulation.

Description

Technical Field

[0001] This invention belongs to the field of magnetic field enhancement technology, specifically relating to a method for enhancing local magnetic fields in free space based on muscle strength enhancement. Background Technology

[0002] With a deeper understanding of the magnetobiological effects, their application in sports training has provided multifaceted support for athletic practice. The magnetobiological effects of pulsed magnetic fields on the human body are most pronounced. A pulsed magnetic field is a transient electromagnetic field generated in a coil by a pulsed current produced by a pulse generator. This technology has yielded rich practical and theoretical research results in the medical field, with its clinical effects on bone repair, cardiovascular diseases, neurological diseases, and injury rehabilitation being widely recognized. It has also been shown to be related to mitochondrial function and myocyte development, regulating myoblast calcium homeostasis, mitochondrial respiration, anti-oxidative stress, and expansion.

[0003] Existing methods for enhancing muscle strength, such as the paper titled "The Influence of Short-Term Low-Frequency Pulsed Magnetic Field Induction of Classical Transient Receptor Potential Channel 1 on Maximum Spontaneous Contractile Force and Strength Endurance of the Biceps Brachii" published in *Chinese Journal of Tissue Engineering Research*, mention that resistance training immediately after magnetic field stimulation of the biceps brachii results in the most significant improvement in muscle strength and endurance. Therefore, it is evident that implementing a 1.5 mT background magnetic field in free space (enough for human movement) and stimulating the human body within this magnetic field while simultaneously performing related strength training can improve muscle strength and endurance.

[0004] However, in implementing muscle strengthening in free space, according to current technology, taking a 2×0.7×0.7m free space as an example, simulation results show that to generate a magnetic field with a strength of 1.5mT in this free space, the total length of copper wire required is approximately 113,040 meters, costing about 320,000 yuan, which is too high. Simultaneously, applying a 1.5mT magnetic field in free space requires a 1A current to flow through the coil, at which point the coil generates 2.1×10⁻⁶ heat per hour. 6 J, the heat coil cannot withstand it. As the above analysis shows, with current technology, it is difficult to simultaneously implement resistance training and magnetic field stimulation within a certain free space. Summary of the Invention

[0005] To address the aforementioned problems and overcome the shortcomings of existing technologies, this invention provides a method for enhancing a local magnetic field in free space based on muscle strength enhancement, thereby resolving the issues mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for enhancing a local magnetic field in free space based on muscle strength enhancement, the method comprising: Establish free space for resistance training; Identify the areas of localized muscle strength enhancement; The required target magnetic field is determined based on the location of the localized muscle strength enhancement. Establish a uniform magnetic field within the free space; A local magnetic field enhancement unit is applied to the local muscle strength enhancement area to achieve local magnetic field enhancement, thereby enabling resistance training and magnetic field stimulation to be implemented simultaneously, and thus achieving muscle strength enhancement.

[0007] Optional methods for establishing a uniform magnetic field in free space include: Define the parameters of the pulse waveform; The pulse waveform is input to a programmable power supply to form an electrical signal; The electrical signal is input to the magnetic stimulation excitation winding coil.

[0008] Furthermore, the parameters of the pulse waveform include continuous pulse frequency, number of continuous pulses, duty cycle, ratio of interval stimulation time to continuous pulse time, overall stimulation time, and magnetic field strength.

[0009] Furthermore, the continuous pulse frequency range is 1000–8000 Hz; the number of continuous pulses ranges from 10 to 50; the duty cycle ranges from 20% to 80%; the ratio of the interval stimulation time to the continuous pulse time ranges from 5 to 20; the overall stimulation time ranges from 5 to 35 min; and the magnetic field strength ranges from 0.0075 to 0.75 mT.

[0010] In a preferred embodiment, before applying the local magnetic field enhancement unit to the local muscle strength enhancement site, the magnetic material used for the local magnetic field enhancement unit is determined, and the method for determining the magnetic material includes: Based on the magnetic field strength of the target magnetic field and the magnetic field strength of the uniform magnetic field in free space, determine the required theoretical amplification factor n; Based on the theoretical magnification factor n, a magnetic material is selected; Adjust the uniform magnetic field until the magnetic field at the site of increased muscle strength meets the target magnetic field requirements; If the continuous pulse frequency range of the pulse waveform is 1000–8000 Hz, and it is impossible to adjust the uniform magnetic field to make the magnetic field frequency of the local muscle strength enhancement area meet the target magnetic field requirements, then a superparamagnetic material is selected as the magnetic material. Utilizing the characteristic that superparamagnetic materials can amplify the third harmonic (3 times the fundamental frequency), the continuous pulse frequency range of the pulse waveform becomes one-third of its original range, i.e., 340–2700 Hz. When the theoretical amplification factor n is less than or equal to 50, the superparamagnetic material is selected based on the Brownian relaxation time. When the theoretical amplification factor n is greater than 50, the superparamagnetic material is selected based on the Niehr relaxation time.

[0011] Optionally, after the magnetic material is determined, the magnetic material is placed in the receiving device, and the receiving device is fixed to the local muscle strengthening site.

[0012] Optionally, the method for selecting the magnetic material includes: When the theoretical magnification factor n is less than 5, the magnetic material is selected as a soft magnetic material; When the theoretical amplification factor n is between 5 and 200, the magnetic material is selected as a superparamagnetic material based on the Brownian relaxation time; When the theoretical amplification factor n is greater than 200, the magnetic material is selected as a superparamagnetic material based on the NieR relaxation time.

[0013] Furthermore, the method for adjusting the magnetic field strength of the uniform magnetic field in free space includes: adjusting the output voltage of the programmable power supply, and simultaneously observing the magnetic field strength of the uniform magnetic field in free space until the measured value of the magnetic field strength is adjusted to the target background magnetic field strength.

[0014] Optionally, before placing the magnetic material into the containing device, pure water is added to dilute the magnetic material.

[0015] The beneficial effects of this invention are as follows: This application provides a method for enhancing local magnetic fields in free space based on muscle strength enhancement, which can significantly reduce implementation costs and effectively reduce coil heat, thus ensuring the feasibility of simultaneously implementing resistance training and magnetic field stimulation. Attached Figure Description

[0016] Figure 1 A flowchart illustrating a method for enhancing a local magnetic field in free space based on muscle strength enhancement, provided as an embodiment of this application.

[0017] Figure 2 for Figure 1 A flowchart of the method for establishing a uniform magnetic field in free space in step S4.

[0018] Figure 3 This is a schematic diagram of a pulse waveform according to an embodiment of this application.

[0019] Figure 4 These are comparison diagrams showing the effects of embodiments of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-4 This application first provides a method for enhancing local magnetic fields in free space based on muscle strength enhancement. At the same time, combined with the scheme mentioned in the paper entitled "The effect of short-term low-frequency pulse magnetic field induction of classical transient receptor potential channel 1 on the maximum voluntary contractile force and strength endurance of biceps brachii", this embodiment is based on the experimental conditions of simultaneous stimulation and training mentioned in the paper.

[0022] Step S1: Establish a free space for resistance training. In this embodiment, the operator first establishes a free space, selecting a laboratory with dimensions of 3×4×2.5m as the free space.

[0023] Step S2: Identify the areas of increased local muscle strength. In this embodiment, the brachioradialis and pronator teres muscles of the forearm are used as examples.

[0024] Step S3: Determine the required target magnetic field based on the location of local muscle strength enhancement. In this embodiment, the target magnetic field with an intensity of 1.5 mT and a frequency of 3300 Hz is used in "The Influence of Short-Term Low-Frequency Pulsed Magnetic Field Induced by Classical Transient Receptor Potential Channel 1 on the Maximum Spontaneous Contractile Force and Strength Endurance of the Biceps Brachii". The target magnetic field uses the same magnetic field parameters as that in "The Influence of Short-Term Low-Frequency Pulsed Magnetic Field Induced by Classical Transient Receptor Potential Channel 1 on the Maximum Spontaneous Contractile Force and Strength Endurance of the Biceps Brachii".

[0025] Step S4: Establish a uniform magnetic field in the free space.

[0026] Step S5: Apply a local magnetic field enhancement unit to the local muscle strength enhancement site to achieve local magnetic field enhancement, realize the simultaneous implementation of resistance training and magnetic field stimulation, and thus achieve muscle strength enhancement.

[0027] Furthermore, the method for establishing a uniform magnetic field in free space in step S4 includes...

[0028] Step S41: Determine the parameters of the pulse waveform.

[0029] Step S42: Input the pulse waveform to the programmable power supply to form an electrical signal; in this embodiment, a programmable power supply of model BP4610 manufactured by NF Corporation is used.

[0030] Step S43: Input the electrical signal to the magnetic stimulation excitation winding coil. In this embodiment, based on theoretical calculations, the magnetic stimulation excitation winding coil structure to be used is: a circular ring structure with an inner diameter of 4m and an outer diameter of 4.1m, and a distance of 2m between the two frames. The winding groove on the frame is 8cm wide and 8cm high, with 1450 turns on each side of the coil, totaling 2900 turns, and a total coil length of approximately 36000 meters. To save on verification costs, this embodiment uses a small magnetic stimulation excitation winding coil, and adjusts the parameters to make its generated magnetic field completely equivalent to that generated by the above-mentioned magnetic stimulation excitation winding coil. The small magnetic stimulation excitation winding coil structure is: a circular ring structure with an inner diameter of 16cm and an outer diameter of 32cm, and a distance of 8cm between the two frames. The winding groove on the frame is 5cm wide and 5cm high, with 270 turns on each side, totaling 540 turns, and 2m terminals are reserved before and after winding, using approximately 280m of enameled copper wire in total.

[0031] Furthermore, the parameters of the pulse waveform described in step S41 include the continuous pulse frequency, the number of continuous pulses, the duty cycle, the ratio of the interval stimulation time to the continuous pulse time, the overall stimulation time, and the magnetic field strength. The continuous pulse frequency range of the pulse waveform is 1000–8000 Hz; the number of continuous pulses ranges from 10 to 50; the duty cycle ranges from 20% to 80%; the ratio of the interval stimulation time to the continuous pulse time ranges from 5 to 20; the overall stimulation time ranges from 5 to 35 min; and the magnetic field strength ranges from 0.0075 to 0.75 mT. In this embodiment, the pulse waveform is detailed in the appendix. Figure 3 The continuous pulse frequency was 3300Hz, the duty cycle was 50%, the number of continuous pulses was 20, the ratio of the interval stimulation time to the continuous pulse time was 10, the overall stimulation time was 10min, and the magnetic field strength was 0.75mT.

[0032] According to relevant theoretical formulas: According to the formula Continuous pulse frequency = Number of continuous pulses / Continuous pulse time τ1, the continuous pulse frequency is 3300Hz and the number of continuous pulses is 20, so the continuous pulse time τ1 is 0.006s. Based on the interval stimulation time τ2 / continuous pulse time τ1=10, the interval stimulation time τ2 can be obtained as 0.06s; Based on the waveform time τ of one cycle = continuous pulse time τ1 + interval stimulation time τ2, the waveform time τ of one cycle can be obtained as 0.066s; The overall stimulation time T is 10 minutes; Based on the magnetic field strength of 0.75 mT and the relevant parameters of the Helmholtz coil used in the experiment, the input voltage U can be calculated to be 1.1 V. Based on the high-level pulse time τH / (High-level pulse time τ) H +Low-level pulse time τ L = Duty cycle and number of continuous pulses × (high-level pulse time τ) H +Low-level pulse time τ L The high-order pulse time τ can be obtained by calculating the continuous pulse time τ1. H =0.00015s, low-level pulse time τ L =0.00015s.

[0033] Furthermore, the local magnetic field enhancement unit in step S5 includes a magnetic material, and the method for determining the magnetic material includes...

[0034] Step S51: Based on the magnetic field strength of the target magnetic field and the magnetic field strength of the uniform magnetic field in free space, determine the required theoretical amplification factor. In this embodiment, the magnetic field strength of the target magnetic field is 1.5 mT. The magnetic field strength of the uniform magnetic field in free space can be obtained through testing. In this embodiment, a gaussmeter of model 902 manufactured by Qingdao Zhongyu Huantai Magnetoelectric Technology Co., Ltd. is selected to measure the magnetic field strength near the ring structure. Before use, press the ZERO button to zero the reading. During use, place the gaussmeter probe parallel to the plane containing the vertical direction of the Helmholtz coil for measurement.

[0035] Step S52: Select a magnetic material based on the theoretical magnification factor.

[0036] Step S53: Adjust the uniform magnetic field until the magnetic field at the site of increased muscle strength meets the target magnetic field requirements.

[0037] Optionally, after the magnetic material is determined, it is placed in a receiving device, and the receiving device is fixed to the local muscle-strengthening area. In this embodiment, a ring-shaped structure made of plastic tubing is used to simulate the shape of a "bracelet," and then it is fixed to the forearm.

[0038] Furthermore, the method for selecting the magnetic material in step S52 includes: When the theoretical magnification factor n is less than 5, the magnetic material is selected as soft magnetic powder; When the theoretical amplification factor n is between 5 and 200, the magnetic material is selected as a superparamagnetic material based on the Brownian relaxation time; When the theoretical amplification factor n is greater than 200, the magnetic material is selected as a superparamagnetic material based on the NieR relaxation time.

[0039] In this embodiment, the theoretical amplification factor n is equal to the magnetic field strength of the target magnetic field divided by the measured value of the background magnetic field strength. In this embodiment, the magnetic field strength of the target magnetic field is 1.5 mT, and the measured value of the background magnetic field strength, i.e., the measured value of the gaussmeter of model 902, is 0.75 mT. Therefore, the theoretical amplification factor n = 2. Therefore, in this embodiment, soft magnetic powder is selected as the magnetic material.

[0040] Furthermore, the method for adjusting the existing magnetic field strength described in step S53 includes: adjusting the output voltage of the programmable power supply, simultaneously observing the measured magnetic field strength of the uniform magnetic field, until the measured value is adjusted to the target background magnetic field strength. In this embodiment, a BP4610 programmable power supply manufactured by NF Corporation is used. After selecting CV-INT, MISC, SEQUENCE, and PROGRAM in sequence, the STEP1 mode is entered, and the AC VOLT value is lowered, thereby reducing the background spatial magnetic field strength. In this embodiment, it is adjusted from 1.1V to 0.82V, that is, the background spatial magnetic field strength is adjusted to 0.58 mT.

[0041] Optionally, before placing the magnetic material into the containing device, dilute it with pure water. In this embodiment, before placing the soft magnetic powder into the "bracelet," dilute it with 20 mL of pure water. This facilitates the uniform distribution of the soft magnetic powder within the "bracelet." Inject the diluted soft magnetic powder into a plastic tube and wrap it around the forearm to simulate the "bracelet" structure. In this embodiment, the "bracelet" is placed in the free space. At this point, the measured magnetic field strength near the "bracelet" is 1.5 mT, thus achieving the experimental objective.

[0042] This completes the local magnetic field enhancement within the free space. Specifically, within a free space of 2×0.7×0.7m, a 0.58mT magnetic field is applied, and a local magnetic field enhancement unit is applied locally to achieve a magnetic field strength of 1.5mT within a local area. This allows for the simultaneous implementation of resistance training and magnetic field stimulation within the free space, thereby enhancing muscle strength.

[0043] According to the appendix Figure 4 As shown, applying the method of this application to achieve a localized magnetic field strength of 1.5 mT requires a total copper wire length of approximately 36,000 meters, costing approximately 100,000 yuan, resulting in a cost saving of approximately 70%; simultaneously, the coil generates 6.8 × 10⁻⁶ heat per hour. 5 J, heat output is reduced to 68%. The method of this application can significantly reduce implementation costs, while effectively reducing coil heat, thus ensuring the feasibility of simultaneously implementing resistance training and magnetic field stimulation.

[0044] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0045] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for enhancing a local magnetic field in free space based on muscle strength enhancement, characterized in that, The method includes: Establish a free space for resistance training; Identify the areas of localized muscle strength enhancement; The required target magnetic field is determined based on the location of the localized muscle strength enhancement. Establish a uniform magnetic field within the free space; A local magnetic field enhancement unit is applied to the local muscle strength enhancement area to achieve local magnetic field enhancement, enabling simultaneous implementation of resistance training and magnetic field stimulation, thereby achieving muscle strength enhancement. The magnetic field strength of a uniform magnetic field in free space is less than that of a local magnetic field. The local magnetic field enhancement unit includes a magnetic material, and the method for determining the magnetic material includes: Based on the magnetic field strength of the target magnetic field and the magnetic field strength of the uniform magnetic field in free space, the required theoretical magnification factor n is determined. The theoretical magnification factor n is equal to the magnetic field strength of the target magnetic field divided by the measured value of the background magnetic field strength. Based on the theoretical magnification factor n, a magnetic material is selected; Adjust the uniform magnetic field until the magnetic field at the site of increased muscle strength meets the target magnetic field requirements; If the frequency of the continuous pulse waveform is in the range of 1000 to 8000 Hz and the magnetic field frequency of the local muscle strength enhancement site cannot meet the target magnetic field requirements by adjusting the uniform magnetic field, then a superparamagnetic material shall be selected as the magnetic material. When the theoretical amplification factor n is less than or equal to 50, the superparamagnetic material is selected based on the Brownian relaxation time. When the theoretical amplification factor n is greater than 50, the superparamagnetic material is selected based on the Niehr relaxation time.

2. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 1, characterized in that, Methods for establishing a uniform magnetic field in free space include: Define the parameters of the pulse waveform; The pulse waveform is input to a programmable power supply to form an electrical signal; The electrical signal is input to the magnetic stimulation excitation winding coil.

3. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 2, characterized in that: The parameters of the pulse waveform include continuous pulse frequency, number of continuous pulses, duty cycle, ratio of interval stimulation time to continuous pulse time, overall stimulation time and magnetic field strength.

4. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 3, characterized in that: The continuous pulse frequency range is 1000–8000 Hz; the number of continuous pulses ranges from 10 to 50; the duty cycle ranges from 20% to 80%; the ratio of the interval stimulation time to the continuous pulse time ranges from 5 to 20; the overall stimulation time ranges from 5 to 35 min; and the magnetic field strength ranges from 0.0075 to 0.75 mT.

5. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 1, characterized in that: After the magnetic material is determined, the magnetic material is placed in the receiving device, and the receiving device is fixed to the local muscle strength enhancement site.

6. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 1, characterized in that, The method for selecting the magnetic material includes: When the theoretical magnification factor n is less than 5, the magnetic material is selected as soft magnetic powder; When the theoretical amplification factor n is between 5 and 200, the magnetic material is selected as a superparamagnetic material based on the Brownian relaxation time; When the theoretical amplification factor n is greater than 200, the magnetic material is selected as a superparamagnetic material based on the NieR relaxation time.

7. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 1, characterized in that, Methods for adjusting the magnetic field strength of a uniform magnetic field in free space include: adjusting the output voltage of a programmable power supply, simultaneously observing the magnetic field strength of the uniform magnetic field in free space, until the measured value of the magnetic field strength is adjusted to the target background magnetic field strength.

8. The method for enhancing a local magnetic field in free space based on muscle strength enhancement according to claim 5, characterized in that: Before placing the magnetic material into the container, dilute it with pure water.

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