sEMG SIGNAL COMPLEXITY AND ENTROPY CHANGES DURING EXERCISE-INDUCED LOCAL MUSCLE FATIGUE
局部肌肉疲劳的表面肌电信号复杂度和熵变化

In order to investigate the behavior of biceps brachii and lumbar erector muscle sEMG signal Lempel-Ziv complexity and Kolmogorov entropy during muscle fatigue, 18 male college students volunteered to take part in the test which required them to complete isomeric and dynamic fatigue contraction test separately. The sEMG signals of biceps brachii and lumbar erector muscle were recorded and their Lempel-Ziv complexity and Kolmogorov entropy were analyzed after sustained time and contraction repetitions standardization processing. The results showed that both Lempel-Ziv complexity and Kolmogorov entropy declined linearly with fatiguing contractions regardless isometric or dynamic contraction test. This results may be related with the "coordination effects" of neuro-control system.