The effect of special exercises for antagonistic muscle action according to joint angles on some biomechanical variables and electrical activity of the muscle for the skill of spiking volleyball

Abstract

The importance of the research is to know the effect of special exercises for antagonistic muscle action, as well as the use of an (EMG) device to identify indicators of the electrical activity of antagonistic muscles in the motor performance of the spiking and blocking wall skill. One of the objectives of the research is to identify the effect of special exercises for antagonistic muscle action according to the angles of the joints. In some biomechanical variables for the skill of spiking volleyball. As for the research problem, the research problem was summarized in the researchers noticing the weak performance of the two studied skills. The researchers attribute the reason for this to the consistency that must be provided in muscular work as a mechanical effect of the working muscles, the most important of which are the primary and antagonist motors, according to the style of the joint angles when performing. In addition to identifying the values ​​of the biomechanical variables studied. The researchers used the experimental method to suit the nature and problem of the research. The research population was the specialized school for volleyball in Diwaniyah Governorate. The research sample numbered 20 players, divided into 10 players for the experimental group and 10 players for the control group. Among the conclusions, the special exercises demonstrated the development and improvement of the level of mechanical properties through... Results .