that the compatibility between the muscles working in the movement depends on the mechanism of muscle work, the compatibility works to be the contraction of the muscles in the joint in the direction required for movement and regulates the nervous system internal compatibility in the same muscle and also between the muscles working in Performance by organizing close cooperation between these working muscles and working to reduce the degree of resistance caused by the muscles, Which contributes significantly to the ability of the muscles working to produce more muscle strength. (6: 129)