Martial arts not only requires athletes to have superb skills and good physical fitness, but also requires them to be able to precisely control the movement of muscles. Myoelectric sensors capture the electrical signals generated during muscle activity, while infrared thermal imaging technology allows for non-invasive measurement and visualization of temperature changes on muscle surfaces. Myoelectric sensor and infrared thermal radiation image technology are used to analyze the muscle activity of martial arts athletes in the training process. Athletes are asked to perform a series of standardized martial arts movements, while using myoelectric sensors to record the electrical signals generated by muscle activity and high-precision infrared thermal imaging cameras to capture changes in muscle surface temperature during the execution of the movements. After data collection, the EMG signal and infrared thermal images were processed by signal processing and image analysis technology, and the computer simulation technology was introduced to build a muscle thermodynamic model to simulate and predict the thermodynamic behavior of muscles under different training loads. The experimental results show that athletes with different martial arts movements and different training levels have significant differences in muscle activity and thermodynamic characteristics. Through the data recorded by the myoelectric sensor, we found that some specific martial arts movements will trigger high-intensity activities of specific muscle groups, and these activities are directly related to the increase of muscle surface temperature, and the increase of muscle temperature is positively correlated with the degree of muscle fatigue after high-intensity training. Athletes with a higher level of training have a smaller increase in muscle temperature when performing the same movements, indicating that they have better muscle heat regulation.
