IRCT20240306061185N6 IRCT 2025-12-25 The University of Shahid Beheshti Shoulder injury prevention exercises for volleyball players The Effect of Eight Weeks of Upper Extremity Performance-Based Injury Prevention Exercises on Glenohumeral Joint Range of Motion and Functional Stability in Male Volleyball Players 2025-12-28 anticipated 60 Complete https://irct.ir/trial/88265 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: In this study, simple randomization method is used and the randomization unit is "individual". Random sequence is generated in Excel software using RAND function and MOD ROW function is used for grouping. In order to observe allocation concealment, each individual's allocation code is placed in illegible and sealed envelopes after being determined in Excel. N/A Preventing shoulder pain and injury. Intervention 1: Intervention group: The Oslo Sports Trauma Research Center Shoulder Injury Prevention Exercises are designed by the Oslo Sports Trauma Research Center to prevent shoulder injuries. The training group will use this protocol for warm-up for eight weeks, three sessions per week for 20 minutes. A goniometer will be used to measure the variables of shoulder internal and external rotation range of motion, and a closed-chain functional test will be used to assess performance in the pre-test and post-test. Intervention 2: Control group: During the research period, there will be no intervention in the control group and they will do their usual exercises. Also, the range of motion of the shoulder internal and external rotation and the closed chain functional test will be measured in the pre-test and post-test. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no further information