The Impact of Using Multi-Joint Exercises Associated with Skill Performance on Developing Certain Physical Qualities and their Relationship to the Performance Accuracy of the Sky Ball Serve" Star Trek" Skill in Volleyball

The research aimed to prepare multi-joint exercises associated with skill performance on developing certain physical qualities and their relationship to the performance accuracy of the sky ball serve" Star Trek" skill in volleyball, The researchers used the experimental approach with the "two equivalent groups" technique. The community research was selected from the players of El-Balaad Sports Club for the professional Spikers for the season 2018-2019. According to the results, the researchers figured out the following conclusions: 1-There are significant differences between the post- tests for favor of the experimental group. 2-Developing the physical qualities has a positive impact on developing the star trek skill accuracy in volley ball.