تأثير تدريبات التوازن والبليومتري علي فاعلية خطوات القدمين لمرحلتي الإقتراب وحفظ الإتزان والمستوي الرقمي لمتسابقي رمي الرمح.

This study aimed to identify the effect of balance and plyometric training on some variables of physical and skill performance and digital level in the javelin throwing competition. The researcher used the experimental approach with a system of two groups, one experimental and the other a control group. The research sample was chosen deliberately from the distinguished students of the Faculty of Physical Education, numbering (12) students who were trained to reach the digital level of the Alexandria region in javelin throwing. They were divided into two groups with (6) students for each group, and the training program was applied to them for a period of 8 weeks after conducting physical measurements, mechanical imaging, and measuring the digital level before and after the experiment, When discussing and analyzing the results, the most important conclusions were first: The use of balance and plyometric exercises positively affects the physical variables of javelin throw competitors. Second: The use of balance and plyometric exercises has a positive effect on the kinematic variables of the javelin throwing phases. Third: The use of balance and plyometric exercises has a positive effect on the digital level of javelin throwers. Therefore, the researcher recommended using balance and plyometric exercises to develop the physical, skill and digital performance levels of javelin throwers. It was also recommended to conduct similar studies on the effect of using balance and plyometric exercises in some other athletics competitions. [ABSTRACT FROM AUTHOR]