CHAOTIC CHARACTER OF SPRINTER'S MYOELECTRIC SIGNAL

Abstract

There are different myoelectric reactions during muscle's motion when athletes are at different training stage. This study analyzed the myoelectric signal at different training stage of athletes according to chaotic theory and found that there were differences in the spectrum character of myoelectric signal and embedding dimension at different training stage of athletes. The results show that the myoelectric signal spectrum at relaxed status of the muscles mainly presents random noisy spectrum character, but the myoelectric signal spectrum at concentric contraction of the muscles presents divided modality spectrum character. The embedding dimension of myoelectric signal is obviously less at contracted status than at relaxed status. The relative value of embedding dimension of myoelectric signal is far larger during the preparation before tournament than during the transition stage.