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In order to reveal the biomechanical characteristics and injury risk factors of football special technology, the prevention of knee joint injury uses surface electromyography telemetry and 3D imaging technology to carry on synchronous test for the technical movement. Using the Butterworth low pass filter in MATLAB software, and combined with signal online segmentation model, this paper designs the signal extraction algorithm. Through the test and the simulation, the results show that the gluteus maximus is discharge obviously and the largest contribution, the contribution of anterior thigh muscles and crus muscle is second, and fast pedal is risk factors of knee joint injury in too small flexor angle, which provides technical reference for football basic skills practice and finalizing the correct technique.

Extraction and Amplification of EMG Signal in Lower Limb Based on Kisavi Camera and Online Segmentation Technology