Abstract
The importance of this study lies in knowing the development of the basic muscles in the performance of the arm by using electrical stimulation and its effect on technical performance, and to infer it through biochemical variables, which are reflected in realistic training and what is the extent of its value and its impact on the achievment of volleyball females players from the category of advancers. The study aimed to know : 
 -values of some biomechanical variables for the skill of the floater serve in the women's volleyball . 
 - the extent and effectiveness of the effect of using an EMS device on the arm muscles , its development and its reflection on the performance movement of the serve through the kinematic variables and the differences between the pre and post tests. 
 The descriptive approach was used by using the pre and post kinematic analysis. The research sample consisted of females players of the Qaraqosh Sports Club, who were 6 from the category of advancers. The researchers used the EMS device for the arm leading to the serve after imaging and analysis in the pre-test to extract the variables (shoulder angle at the moment of hitting the ball , maximum height of the ball at the moment of hitting the ball , ball launch velocity , ball launch angle, angular distance , time of movement, angular velocity) After completing the electrical stimulation program and sessions, over a period of five weeks, the same variables were analyzed in a post-test. 
 The most important conclusions of the study were - that the use of electrical stimulation EMS helped in the development of the ball’s launch velocity - there were statistical differences in the arithmetic averages in the variables of the angular velocity and the angular distance between the two pre and post tests as a result of the effect of electrical stimulation, which achieved even partially the goal of the research according to the kinematic view
Highlights
S device for the arm leading to the serve after imaging and analysis in the pre-test to extract the variables After completing the electrical stimulation program and sessions, over a period of five weeks, the same variables were analyzed in a post-test
The importance of this study lies in knowing the development of the basic muscles in the performance of the arm by using electrical stimulation and its effect on technical performance, and to infer it through biochemical variables, which are reflected in realistic training and what is the extent of its value and its impact on the achievment of volleyball females players from the category of advancers
-values of some biomechanical variables for the skill of the floater serve in the women's volleyball
Summary
S device for the arm leading to the serve after imaging and analysis in the pre-test to extract the variables (shoulder angle at the moment of hitting the ball , maximum height of the ball at the moment of hitting the ball , ball launch velocity , ball launch angle, angular distance , time of movement, angular velocity) After completing the electrical stimulation program and sessions, over a period of five weeks, the same variables were analyzed in a post-test. تأثير استخدام ألتحفيز ألكـهربائي EMSعـلى بعض ألـمتغي ارت ألـكينماتيكية للرسال الـمتموج الأمامي فـي الـكرة الـطائرة
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