An evaluation method and device for strength training

Abstract

The present application discloses an evaluation method and device for strength training, which relates to the field of fitness. A user performs strength training, and the standard movement amplitude of the user performing this action is obtained; the training movement amplitude of the user performing the same action is obtained; the training movement amplitude and the standard movement amplitude corresponding to the same action are compared to obtain a determination result of the movement quality. The present application can cover all dimensions of the user's movement, and realizes a detailed evaluation of the movement quality, with a wider scope of application, higher accuracy, and is convenient for long-term use.

Description

Technical Field

[0001] This application relates to the field of fitness, and specifically to a method and device for evaluating strength training. Background Art

[0002] With the increasing improvement of living standards, maintaining a healthy physical state has become a basic pursuit of people. However, in real life, people are quite confused about the types of fitness exercises they should do and how to choose the right fitness programs to achieve their goals. Therefore, an intelligent fitness system that can formulate fitness plans according to the user's own situation has a broad market prospect at present.

[0003] An effective intelligent fitness hardware should not only be able to give users a fitness plan and support users to execute training, but also monitor the quality of the training actions completed by users to ensure that the users' actions are as standard as possible, so as to obtain better fitness effects. At the same time, when a user does a set of actions, if the performance of each action in the set varies greatly and the user cannot adapt to the set action intensity, it will reduce the user's experience and is not convenient for long-term use.

[0004] At present, the action feedback methods of intelligent fitness devices can cover fewer actions, lack of detailed evaluation of action quality, and have fewer judgment scenarios and dimensions, which cannot cover all dimensions of users' actions. At the same time, when performing action feedback, the accuracy is relatively low and it is not convenient for long-term use. Summary of the Invention

[0005] This application provides a method and device for evaluating strength training, which can perform multi-dimensional action feedback, and the feedback information is more scientific and reasonable, facilitating the long-term use of fitness devices.

[0006] This application provides a method for evaluating strength training, including:

[0007] The user performs strength training, records the distance that the first action cable is pulled out during the first set of training actions of the same action, and obtains the standard action amplitude of the user performing this action;

[0008] Obtain the training action amplitude of the user when performing the same action;

[0009] Compare the training action amplitude corresponding to the same action with the standard action amplitude to obtain the action quality determination result.

[0010] In this application, by setting the standard amplitude of an action and then comparing it with the amplitude of the user's each execution of this action, it is determined whether the action quality meets the standard when the user performs this action. Compared with the existing methods, this application can be used for all actions trained by pulling a rope, with a wider scope of application. Secondly, through the comparison between the training action amplitude and the standard action amplitude, the quality of each action can be evaluated, and the evaluation result is more accurate. Moreover, it can be applied to different users, and the setting is more scientific and reasonable.

[0011] Furthermore, in order to better evaluate the details of the action quality, this application divides the standard action amplitude into the concentric standard action amplitude and the eccentric standard action amplitude. The concentric standard action amplitude is the distance that the cable is concentrically pulled out during the first action of the first set of training actions for the same action, and the eccentric standard action amplitude is the distance that the cable is eccentrically pulled out during the first action of the first set of training actions for the same action. The training action amplitude includes the concentric action amplitude and the eccentric action amplitude. The concentric action amplitude is the distance that the cable is concentrically pulled out for the same action, and the eccentric action amplitude is the distance that the cable is eccentrically pulled out for the same action. During strength training, the concentric action amplitude and the eccentric action amplitude of the user are separately evaluated to ensure the evaluation accuracy and meticulousness of each action.

[0012] In an optional implementation, the starting point of the concentric motion where the direction of the speed at which the cable is concentrically pulled out is positive and the speed ≥ V is obtained, where V is a preset first speed value;

[0013] The ending point of the concentric motion where the direction of the speed at which the cable is concentrically pulled out is positive and the speed < V within the first continuous time period is obtained;

[0014] The starting point of the concentric motion corresponds one-to-one with the ending point of the concentric motion. For each generated ending point of the concentric motion, the distance from the corresponding starting point of the concentric motion to the corresponding ending point of the concentric motion is calculated;

[0015] The distances from all starting points of the concentric motion to their respective corresponding ending points of the concentric motion are calculated to obtain the concentrically pulled-out distance.

[0016] In an optional implementation, the starting point of the eccentric motion where the direction of the speed at which the cable is eccentrically pulled out is negative and the speed ≥ V is obtained, where V is a preset first speed value;

[0017] The ending point of the eccentric motion where the direction of the speed at which the cable is eccentrically pulled out is negative and the speed < Z within the second continuous time period is obtained, where Z is a preset second speed value;

[0018] The starting point of the eccentric motion corresponds one-to-one with the ending point of the eccentric motion. For each generated ending point of the eccentric motion, the distance from the corresponding starting point of the eccentric motion to the corresponding ending point of the eccentric motion is calculated;

[0019] Calculate the distance from the starting point of each centrifugal motion to its corresponding ending point of the centrifugal motion to obtain the centrifugal pulling-out distance.

[0020] Among them, the centripetal pulling-out distance and the centrifugal pulling-out distance are both greater than or equal to a predetermined distance.

[0021] In an alternative implementation, obtaining the action quality determination result includes:

[0022] If the amplitude of the training action is greater than the amplitude of the standard action, determine that the action quality determination result is an action error;

[0023] If the amplitude of the training action is greater than or equal to a first preset ratio of the amplitude of the standard action and less than a second preset ratio of the amplitude of the standard action, determine that the action quality determination result is an unstandard action, where the first preset ratio is less than the second preset ratio;

[0024] If the amplitude of the training action is greater than or equal to the second preset ratio of the amplitude of the standard action and less than a third preset ratio of the amplitude of the standard action, determine that the action quality determination result is a standard action, where the second preset ratio is less than the third preset ratio;

[0025] If the amplitude of the training action is less than the first preset ratio of the amplitude of the standard action, determine that the action quality determination result is an action error.

[0026] Furthermore, in order to enable the user to better master their own training situation during the training process, the present application outputs corresponding action feedback according to the action quality determination result, and the action feedback includes but is not limited to page special effects or voice prompts, so that the user can better obtain training information.

[0027] In an alternative implementation, when each ending point of the centripetal motion is generated, calculate the distance from all the starting points of the centripetal motion accumulated this time to their corresponding ending points of the centripetal motion to obtain the accumulated centripetal motion distance this time; compare the accumulated centripetal motion distance this time with the corresponding amplitude of the standard action to obtain the action quality determination result, and output corresponding action feedback according to the action quality determination result.

[0028] Corresponding to the method in the present application, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned evaluation method for strength training are implemented.

[0029] Corresponding to the method in the present application, the present application also provides a storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the above-mentioned evaluation method for strength training are implemented.

[0030] One or more technical solutions provided by the present application have at least the following technical effects or advantages:

[0031] The present application can cover all dimensions of user actions and achieve a detailed evaluation of action quality, with a wider scope of application, higher accuracy, and convenience for long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the embodiments of the present application, form a part of the present application, and do not limit the embodiments of the present application. In the drawings:

[0033] Figure 1 It is a schematic diagram from the centripetal motion starting point k to the centripetal motion ending point k and from the centrifugal motion starting point k to the centrifugal motion ending point k;

[0034] Figure 2 It is a schematic diagram of centripetal motion distance feedback and centrifugal motion distance feedback;

[0035] Figure 3 It is a schematic diagram of the electronic part of the strength fitness device in Embodiment 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to more clearly understand the above objects, features, and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0037] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0038] Those skilled in the art should understand that in the disclosure of the present application, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present application.

[0039] It will be understood that the term "a" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of an element may be one, while in other embodiments, the number of the element may be multiple. The term "a" should not be construed as a limitation on the number. For example, in the description of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups).

[0040] The term "and / or" in this document is merely an associative relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: the existence of A, the simultaneous existence of A and B, and the existence of B. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after.

[0041] The method of the embodiment in the present application is applicable to an intelligent fitness device having a motor and a tension component. The motor provides resistance for the movement of the tension component. The tension component can be a pull rope. The motor provides resistance for the pulling out of the pull rope, and the user trains through the pull rope with resistance. Or the tension component can also be a kind of support arm. The motor provides resistance for the movement of the support arm, and the user trains through the support arm.

[0042] Embodiment 1

[0043] The present application provides a method for evaluating strength training, and the method includes:

[0044] When the user performs strength training, record the distance that the first action cable of the first set of training actions of the same action is pulled out, and set it as the standard action amplitude for the user to perform this action. The standard action amplitude includes the concentric standard action amplitude and the eccentric standard action amplitude. The concentric standard action amplitude is the distance that the first action cable of the first set of training actions of the same action is pulled out concentrically, and the eccentric standard action amplitude is the distance that the first action cable of the first set of training actions of the same action is pulled out eccentrically.

[0045] Obtain the training action amplitude when the user performs the same action. The training action amplitude includes the concentric action amplitude and the eccentric action amplitude. The concentric action amplitude is the distance that the cable of the same action is pulled out concentrically, and the eccentric action amplitude is the distance that the cable of the same action is pulled out eccentrically.

[0046] Obtaining the concentrically pulled-out distance includes:

[0047] Obtain the concentric movement starting point Si where the direction of the speed at which the cable is pulled out concentrically is positive and the speed ≥ V, where V is a preset first speed value. For example, V = centimeters per second (cm / s), i ∈ [1, n], and n is a positive integer.

[0048] The direction of the speed at which the cable is pulled centripetally is taken as positive, and the centripetal motion end point Ki where the speed is <V within the first continuous time T1 is obtained. For example, the continuous time T1 is 100 milliseconds (ms), i ∈ [1, n], and n is a positive integer.

[0049] The centripetal motion start point Si corresponds one-to-one with the centripetal motion end point Ki. For each generated centripetal motion end point Ki, calculate the distance from the corresponding centripetal motion start point Si to the corresponding centripetal motion end point Ki, as Figure 1 shown;

[0050] Calculate the distances from all centripetal motion start points Si to their respective corresponding centripetal motion end points Ki to obtain the centripetal pull-out distance, where i ∈ [1, n], and n is a positive integer.

[0051] Obtain the centrifugal pull-out distance, including:

[0052] Obtain the centrifugal motion start point Hi where the direction of the speed at which the cable is pulled centrifugally is negative and the speed ≥ V, i ∈ [1, n], and n is a positive integer;

[0053] Obtain the centrifugal motion end point Fi where the direction of the speed at which the cable is pulled centrifugally is negative and the speed is <Z within the second continuous time T2. For example, the continuous time T2 is 200 milliseconds (ms), Z = 1 cm / s, i ∈ [1, n], and n is a positive integer.

[0054] The centrifugal motion start point Hi corresponds one-to-one with the centrifugal motion end point Fi. For each generated centrifugal motion end point Fi, calculate the distance from the corresponding centrifugal motion start point Hi to the corresponding centrifugal motion end point Fi, as Figure 1 shown.

[0055] Calculate the distances from all centrifugal motion start points Hi to their respective corresponding centrifugal motion end points Fi to obtain the centrifugal pull-out distance, where i ∈ [1, n], and n is a positive integer.

[0056] If the amplitude of the training action is greater than the standard action amplitude, the action quality determination result is that the action is incorrect.

[0057] If the amplitude of the training action is greater than or equal to the first preset ratio of the standard action amplitude and less than the second preset ratio of the standard action amplitude, the action quality determination result is that the action is not standard, where the first preset ratio is less than the second preset ratio. For example, the first preset ratio is 50%, and the second preset ratio is 85%.

[0058] If the amplitude of the training movement is greater than or equal to the second preset ratio of the standard movement amplitude and less than the third preset ratio of the standard movement amplitude, the action quality determination result is that the action is standard, where the second preset ratio is less than the third preset ratio. For example, the third preset ratio is 100%.

[0059] If the amplitude of the training movement is less than the first preset ratio of the standard movement amplitude, the action quality determination result is that the action is incorrect.

[0060] Compare the amplitude of the training movement and the standard movement amplitude corresponding to the same action to obtain the action quality determination result.

[0061] Output the corresponding action feedback according to the action quality determination result. The action feedback includes but is not limited to page special effects or voice prompts.

[0062] In one or more embodiments, as Figure 2 shown, for each generated centripetal movement end point Ki, calculate the distance from all the centripetal movement start points Si accumulated in that instance to the centripetal movement end point Ki to obtain the accumulated centripetal movement distance in that instance; compare the accumulated centripetal movement distance in that instance with the corresponding standard movement amplitude to obtain the action quality determination result, and output the corresponding action feedback according to the action quality determination result.

[0063] In one or more embodiments, the user performs strength training to obtain the standard movement amplitude of the user performing this action;

[0064] Each time the user performs the same action practice, obtain the centripetal movement amplitude and the centrifugal movement amplitude of this action;

[0065] Compare the centripetal movement amplitude with the centripetal standard movement amplitude and the centrifugal movement amplitude with the centrifugal standard movement amplitude respectively;

[0066] Based on the action quality determination result, prompt the user about the quality of the action completion, and output feedback through different action scores. Each determination result is preset with a determination score, and the judgment scores of different actions are displayed on the fitness device.

[0067] In one or more embodiments, the fitness device further includes a display configured to display workout content (pre-recorded video or live stream) and an interface that enables the user to personalize the workout. Additionally, the smart fitness mirror can allow the user and / or the coach to interact with each other during the workout in a manner similar to a regular workout in a gym or a small fitness studio where the user and the coach are in the same room (e.g., providing feedback to the coach about the workout rhythm and correcting the user's form during a specific fitness program). This fitness device, which is a smart fitness mirror, may also include a processor for partially controlling the operation of various sub-components in the smart fitness mirror and managing the data flow into / out of the smart fitness mirror (e.g., video content, audio from the coach or the user, biometric feedback analysis). The smart fitness mirror can include a display for showing video content, a graphical user interface through which the user can interact with and control the smart fitness mirror, and a mirror including a reflective area, where the image partially displayed through the reflective area by the display is superimposed on the user's reflected image in the reflective area part.

[0068] As shown in Table 1 specifically:

[0069] Table 1

[0070]

[0071] In a specific embodiment, the user performs a set of deadlift training, completing 1 set of 9 deadlifts with a concentric load of 30 kg and an eccentric load of 50 kg. Since the user is training for the first time, their understanding of the training movements and strength ability are both relatively weak. As shown in Table 2,

[0072] Table 2

[0073]

[0074]

[0075] During the process of performing the training, the user's first movement is standard and they get a full score; the second movement amplitude does not meet the standard, and the system prompts that the movement amplitude does not meet the standard, and they only get 75% of the score; subsequently, the user continuously makes mistakes in strength control and continuously gets low scores and error prompts.

[0076] When settling the bill for a single class, the total scores of each set of training are accumulated to calculate the user's total score. By comparing the user's total score with the full score, a course completion evaluation is obtained to present the training quality of the user's single class.

[0077] Embodiment Two

[0078] In some embodiments, the centripetal standard motion amplitude is the distance that the cable is centripetally pulled out during the first movement of the first set of training movements for the same movement, and the centrifugal standard motion amplitude is the distance that the cable is centrifugally pulled out during the first movement of the first set of training movements for the same movement. In addition, the standard motion amplitude also meets the following requirements:

[0079] Obtain the maximum value pos_max(1) of the first pull by the user, the minimum value pos_recycle(1) of the first retraction, the maximum value pos_max(2) of the second pull, and the minimum value pos_recycle(2) of the second retraction;

[0080] Among them, pos_max(1) is the end point of the final centripetal motion during the first pull, pos_recycle(1) is the end point of the final centrifugal motion during the first retraction, pos_max(2) is the end point of the final centripetal motion during the second pull, and pos_recycle(2) is the end point of the final centrifugal motion during the second retraction;

[0081] If pos_max(2) ≥ pos_max(1) - M and pos_max(2) - pos_recycle(2) ≥ M, then the calibrated range of motion (ROM) = pos_max(1) - pos_recycle(1), where M is a preset first threshold. For example, M = 0.05 m (meter);

[0082] If it does not meet the requirements, pull again until the nth pull meets pos_max(n) ≥ pos_max(n - 1) - M and pos_max(n) - pos_recycle(n) ≥ M, then the calibrated range of motion ROM = pos_max(n - 1) - pos_recycle(n - 1).

[0083] That is, both the centripetal pull distance and the centrifugal pull distance are greater than or equal to the predetermined distance M. For example, M = 5 cm (centimeter).

[0084] Embodiment III

[0085] In one or more embodiments, the fitness device includes a motor, a differential, a support arm, a tension assembly, and corresponding controllers, circuits, and accessories. For example, the tension assembly includes a pull rope. A belt is connected between the output shaft of the motor and the differential. One end of the pull rope is connected to the differential, and the other end of the pull rope travels along the support arm and then is connected to a corresponding pull ring or other fitness accessories. When exercising, the user can exercise by pulling the pull rope or by using the support arm. The pull rope drives the motor to move through the differential and the belt. When the motor is powered on, it generates an output torque, that is, resistance. The user needs to overcome the output torque of the motor when pulling the pull rope, thereby achieving the purpose of the user's strength training.

[0086] When exercising, the user inputs their own parameters on the fitness device, including height, fitness level, training goals, etc. When exercising, different fitness modes are selected. After selection, the fitness device obtains a set weight according to the user's parameters and the selected fitness mode, and adjusts the motor output force under the preset linear function corresponding to the fitness mode according to the user's pulling situation, thereby making the user's fitness more scientific and safe and better achieving the fitness purpose.

[0087] Embodiment Four

[0088] In one or more embodiments, the action feedback is displayed through a graphical user interface (GUI). The graphical user interface (GUI) includes page animations, and the page animations include but are not limited to changing animations, such as highlighting or flashing the page icons involved in the action feedback, and displaying a progress bar on the page information involved. When performing action control, the action the user is doing is recognized and prompt actions or suggested actions are displayed, etc. When performing voice control, prompt completion is performed according to the user's voice command, etc.

[0089] Embodiment Five

[0090] In one or more embodiments, the control element of the motor can obtain the output force value. The length can determine the stretching amplitude of the pull rope according to the number of turns of the motor, or other devices such as sensors can be used to measure the amplitude value of the pull rope, that is, the amplitude of the training action is obtained.

[0091] The standard action amplitude can be preset by the user initialization or obtained according to the user parameter information for the standard action amplitude corresponding to the action.

[0092] Embodiment Six

[0093] Embodiment Six of the present application provides a strength fitness device. Figure 3 The shown electronic part of the strength fitness device includes a memory 310, a processor 320, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the evaluation method for a strength training are implemented.

[0094] Among them, the processor can be a Central Processing Unit (CPU), or other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., such as single-chip microcomputers. The general-purpose processor can be a microprocessor or any conventional processor, etc.

[0095] The memory can be used to store the computer program and / or modules. The processor realizes various functions of an apparatus for obtaining a leaderboard in the invention by running or executing the data stored in the memory. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory can include high-speed random access memory, and can also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart memory card, secure digital card, flash memory card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices. For example, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, optical disk, etc. RAM can include static RAM or dynamic RAM.

[0096] Embodiment Seven

[0097] Embodiment Seven of this application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for evaluating strength training are implemented.

[0098] The computer storage medium of the embodiments of the present application may adopt any combination of one or more computer-readable media. The computer-readable media may be computer-readable signal media or computer-readable storage media. The computer-readable storage media may be, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples (a non-exhaustive list) of the computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, the computer-readable storage media may be any tangible medium that contains or stores a program, and the program may be used by or in combination with an instruction execution system, apparatus, or device.

[0099] If the units or modules of the above embodiments are implemented in the form of software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a processor to execute all or part of the steps of the methods of the various embodiments of the present application. The foregoing storage media include: USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs and other media that can store program codes.

[0100] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0101] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. An evaluation method for strength training, characterized in that, Including: When the user performs strength training, obtaining the standard action amplitude of the user's performed action; Obtaining the training action amplitude when the user performs the action; Comparing the training action amplitude and the standard action amplitude corresponding to the action to obtain an action quality determination result; the standard action amplitude includes a concentric standard action amplitude and an eccentric standard action amplitude. The concentric standard action amplitude is the distance that the cable is concentrically pulled out for the first action of the first set of training actions of the same action, and the eccentric standard action amplitude is the distance that the cable is eccentrically pulled out for the first action of the first set of training actions of the same action; the training action amplitude includes a concentric action amplitude and an eccentric action amplitude. The concentric action amplitude is the distance that the cable is concentrically pulled out for the same action, and the eccentric action amplitude is the distance that the cable is eccentrically pulled out for the same action; Obtaining the starting point of concentric motion where the direction of the speed at which the cable is concentrically pulled out is positive and the speed ≥ V, where V is a preset first speed value; obtaining the ending point of concentric motion where the direction of the speed at which the cable is concentrically pulled out is positive and the speed < V within a first continuous time; the starting point of concentric motion corresponds to the ending point of concentric motion one by one. For each generated ending point of concentric motion, calculating the distance from the corresponding starting point of concentric motion to the corresponding ending point of concentric motion; Calculating the distances from all starting points of concentric motion to their respective corresponding ending points of concentric motion to obtain the concentrically pulled out distance; obtaining the starting point of eccentric motion where the direction of the speed at which the cable is eccentrically pulled out is negative and the speed ≥ V, where V is a preset first speed value; obtaining the ending point of eccentric motion where the direction of the speed at which the cable is eccentrically pulled out is negative and the speed < Z within a second continuous time, and Z is a preset second speed value; the starting point of eccentric motion corresponds to the ending point of eccentric motion one by one. For each generated ending point of eccentric motion, calculating the distance from the corresponding starting point of eccentric motion to the corresponding ending point of eccentric motion; calculating the distances from all starting points of eccentric motion to their respective corresponding ending points of eccentric motion to obtain the eccentrically pulled out distance; both the concentrically pulled out distance and the eccentrically pulled out distance are greater than or equal to a predetermined distance; if the training action amplitude is greater than the standard action amplitude, then determining that the action quality determination result is an action error; if the training action amplitude is greater than or equal to a first preset ratio of the standard action amplitude and less than a second preset ratio of the standard action amplitude, then determining that the action quality determination result is an action not standard, where the first preset ratio is less than the second preset ratio; If the training action amplitude is greater than or equal to the second preset ratio of the standard action amplitude and less than the third preset ratio of the standard action amplitude, then determining that the action quality determination result is an action standard, where the second preset ratio is less than the third preset ratio; if the training action amplitude is less than the first preset ratio of the standard action amplitude, then determining that the action quality determination result is an action error.

2. The evaluation method for strength training according to claim 1, characterized in that Also including: Outputting a corresponding action feedback according to the action quality determination result.

3. The evaluation method for strength training according to claim 2, characterized in that, The action feedback includes page special effects or voice prompts.

4. The evaluation method for strength training according to claim 1, wherein, Also including: For each generated centripetal motion end point, calculate the distances from all the accumulated centripetal motion start points of the current time to their respective corresponding centripetal motion end points to obtain the accumulated centripetal motion distance of the current time. Compare the accumulated centripetal motion distance of the current time with the corresponding standard motion amplitude to obtain the motion quality determination result, and output the corresponding motion feedback according to the motion quality determination result.

5. A fitness device for performing the method according to any one of claims 1-4.

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