Effects of Training program to improve Rotator Cuff Muscles imbalance and injury prevention on Javelin throw velocity

The javelin throw is one of the events characterized by complex technical performance and related to physical elements, the most important of which is the explosive ability to generate the velocity of the moment of release. and despite the development of the world record (89.34)but the Qatari record is still (66.34) the difference between them (22.98) that's an critical indicator.but these high release velocities may lead to injury, especially in the shoulder joint due to several reasons, the most important is the muscular balance between the shoulder rotator muscles that responsible of rotating the shoulder during release phase, which was shown from the results of the pilot study Which prompted the researcher to do this study to know if the program will improve the muscular balance ratio between the rotator cuff muscles of the shoulder the study procedures have been used to collect data by Biodex Advantage device Software Version 4.X dynamometer multi joint system. This study was applied by(12) of the best players of Qatar all players participated in the program for 8 weeks by three training sessions per week to train on the functional strength The results showed the positive effect of the training program on the rotator cuff muscles of internal rotation IR and external rotation ER as well as the significant of muscle balance values for external rotation and significant of muscle balance ratio and its positive effect on the release velocity, which increases the efficiency of the shoulder joint which may reduce injury risk factor