Electromyography is the bioelectrical pattern of muscles recorded by electromyography. It has an important role in evaluating the person in the human-computer system. It can be measured using a specialized EMG or a polysynthesizer. The graph, measured during the operation of a static biometer, shows three typical waveforms: simple phase, mixed phase and interference phase, which are very closely related to the complex strength of the muscle. When the muscle is lightly loaded an isolated, single low amplitude motor potential with a certain interval and a certain frequency is also known as the simple phase. Mixed phase and interference phase also methods also need to be mastered.