Analysis of the Electromyography (EMG) and Mechanomyography (MMG) may understand when the contracture of muscle potential shift and the muscle fiber vibration graph change situation, frequently use it for discussing the contracture of muscle strength and EMG, MMG amplitude relations, a tool to determine when muscle fatigue. The purpose of this study was used to understand the MMG signal in the different forms of contraction, MVC%, when fatigue situation changes, and discusses EMG and MMG on scientific research applications.