Kinematic indicators contribute to the performance of arms movements of butterfly swimmers age group (13-15) years

The swimmer's performance requires the availability of some physical and skill requirements for swimmers. Although these requirements are met by many swimmers, there is a lack of biomechanical information for swimmers. The nature of performance; most coaches do not care to provide players with sufficient information about the biomechanical variables of performance,,  In this study, the researcher attempts to use biomechanical feedback, which provides the players with the biomechanical information related to the nature of the performance such as the angle of the arms entering the water, the speed of the legs and arms, the amount of tensile force and the direction Power and force boost with support for images and video, where the researcher tries through this study to improve the technical performance of the butterfly swim by providing swimmers feedback kinematic. In order to identify the kinetic signs contributing to the performance of arms movements of butterfly swimmers In the light of the findings and conclusions reached, the recommendations were reached next Guided by the values of the kinetic indicators that have been reached as indicators that lead to the assessment of the current level of performance of the movements of the caterpillars in the butterfly swimmers and used in directing educational and training programs to master the skill under study. Also, developing objective training to develop the skill level according to the kinetic variables contributing to the performance of the arms movements of the butterfly Swimmers. Also, Conduct more research and studies similar to other swimming sports skills as well as other sports activities. In addition, The use of modern mechanical analysis techniques in the direction of training programs and educational and evaluation in the areas of sports education, especially