Comparison of Some Types of Plyometric Exercises for Developing Some Physical Abilities

2 Abstract: The research aims to identify the impact of some plyometric exercises performance represented in bouncing jump, hurdles exercise, depth jump exercise on developing the leg's muscular power and transition speed. The sample of the research included 30 junior players -under 17 years- of the volleyball team in El- Bashaeir sports club of Sultanate Oman. The researcher used the experimental method with a design of three groups, pre- and post measurements and the vertical jump distance from stability and motion, as well as the time of running 20 meters. The results showed an improvement rate of the bouncing jump group, hurdles group and depth jump group. Moreover, the results showed surpass of the hurdles group on the bouncing Jump group in the vertical jump distance and surpass of the deep jump group on the bouncing jump and hurdles groups in the legs muscular power variable. None of the three used methods (bouncing jump-hurdles-deep jump) achieved any surpass than the other developing transition speed.