Dynamic Resistance Exercise Devices for Position-Based Strength Measurement
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Solution Overview
Problem
Traditional muscle strength testing methods provide only a single maximum value, failing to capture the dynamic changes in muscle force throughout the contraction process, leading to ineffective training or muscle injuries due to overloading.
Innovation Solution
A method using an exercise device with dynamically variable resistance and an arithmetic control unit to measure maximum muscle strength values at each position during the exercise process, generating initial and test muscle strength values through incremental adjustments, and forming a muscle strength curve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional single-value maximum strength testing methods are used, then the testing process is simple, but the measurement precision is insufficient because only a single maximum value is obtained without capturing dynamic force changes throughout the contraction process
Solution Approach 1:
The patent segments the exercise process into multiple position points (e.g., 0°, 30°, 60°, 90°, 120°, 150°, 180°) along the range of motion. At each position, the muscle strength is measured and recorded separately, transforming a single-value measurement into a multi-point dynamic profile. This segmentation allows capturing the force changes throughout the contraction process while using a relatively simple incremental loading procedure.
Solution Approach 2:
The patent adds the dimension of position (angle) to the traditional single-value strength measurement. Instead of measuring only the maximum force, the system now measures force as a function of position (F-s curve), creating a two-dimensional representation of muscle strength characteristics. This dimensional expansion provides comprehensive information about strength at different joint angles without requiring complex equipment.
2Measurement precision
If traditional fixed-weight repeat exercise method is used, then the device complexity is low, but the measurement precision is insufficient because it cannot show actual force changes at different positions in the exercise process
Solution Approach 1:
The patent implements a dynamic measurement approach where the resistance weight is incrementally increased during the exercise process based on the user's performance. The system adjusts the loading dynamically - if the user completes a repetition, the weight increases; if not, it remains the same or decreases. This dynamic adjustment allows the system to probe the user's true maximum strength at different positions while maintaining ease of operation through automatic control.
Solution Approach 2:
The system incorporates feedback mechanisms where the arithmetic control unit monitors the user's exercise performance in real-time and adjusts the resistance accordingly. The feedback loop compares the applied weight with the user's actual strength capacity at each position, enabling the system to identify the maximum strength point. This feedback-based approach maintains operational simplicity while achieving high measurement precision.
3Measurement precision
If incremental weight increase testing is used to find maximum strength, then the measurement precision improves, but the loss of time increases due to repeated full rest and warm-up requirements before each testing
Solution Approach 1:
The patent performs a preliminary measurement phase where the user exercises at constant speed to establish baseline muscle strength values at different positions. These preliminary data serve as the foundation for subsequent maximum strength testing, eliminating the need for repeated warm-up periods. The incremental weight increase builds upon this preliminary information, allowing the system to efficiently converge on the maximum strength value without redundant preparation time.
Solution Approach 2:
The system maintains continuous useful action by implementing a progressive testing protocol where each test builds upon the previous one. Instead of requiring full rest and warm-up between tests, the user continues exercising with incrementally adjusted weights. This continuous approach minimizes idle time while systematically determining the maximum strength at each position, as the user remains actively engaged in productive measurement throughout the process.
Data Source
AI summary
The invention relates to a method, an exercise device and a software for measuring maximum muscle strength value. Wherein, the method for measuring the maximum muscle strength value through an exercise device with dynamically variable resistance signal-connected to an arithmetic control unit, is obtained by performing the following steps. The steps include: an obtaining original muscle strength value step, an initial muscle strength value generation step and a maximum muscle strength value generation step. The characteristic of the present invention is that the maximum muscle strength value is obtained according to the position of the exercise process, which overcomes the shortcoming of traditional technology that can only obtain a single data. Moreover, the present invention further forms a maximum muscle strength curve, whereby the obtained data can be used in fitness training to effectively improve training effects and avoid muscle injuries caused by overloading.