الفهرس 
Effect of Plyometric Exercise on Shoulder Function After Overuse Injuries for Adolescents
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Abstract
Introduction: Shoulder joint is one of the most important movable joints in the body, plus its connection with many activities daily living, so any mechanical disturbance or repetitive use in bad manner with weak rotator cuff muscles will cause pain most commonly in overhead activities. Purpose:is to determine the effect of plyometric exercise on shoulder function after overuse injuries for adolescent. Subjects:Thirty adolescent boys age from fifteen to eighteen complained from shoulder pain in overhead activities participated in this study.They were evaluated by universal goniometer and functional throwing performance index. They were assigned randomly into two groups of equal numbers; group (A) boys had received selected plyometric exercise plus selected physical therapy traditional program and group (B) had received only selected traditional physical therapy program. All boys received selected physical therapy program for one hour per day for three days per week for six successive weeks, and group (A) received six selected plyometric exercise. Results There was a significant increase in functional throwing performance index and a significant decrease in glenohumeral internal rotation deficitof group A compared with that of group B post treatment (p < 0.001).Conclusion: Plyometric exercise should be essential part in physical therapy protocol to enhance more functional performance for shoulder joint and marked decrease of pain on overhead activities