Effects of movement velocity, acceleration and initial degree of muscle flexion on bicep EMG signal amplitude

This study aims to determine the factors that affect the electromyography signal amplitude of human muscles. In a previous study, it was determined that increases in movement velocity and acceleration led to an increase in EMG signal amplitude. In this study, EMG signal amplitudes were investigated under varying degree of muscle flexion while at rest, by varying the angle of initial positions. Eight healthy subjects performed bicep curl movements with three different velocities at three different initial positions, with at least thirty movement repetitions each. The results were summarized, processed, and statistically analysed in order to show the relationship between the above stated factors and EMG signal amplitude.