"Impact of Resistance Training on Shoulder Strength and Injury Prevention in School Volleyball Players"

Abstract

This study investigates the effectiveness of a structured resistance training program in enhancing shoulder strength and reducing injury incidence among school volleyball players. A total of 72 high school volleyball players (aged 14-18 years) were randomly assigned to three groups (n=24 per group): Group I received a comprehensive shoulder-focused resistance training program, Group II participated in traditional volleyball training with basic strengthening exercises, and Group III served as the control group with standard volleyball practice only. The intervention was conducted over a 16- week period during the competitive season, with resistance training sessions performed twice weekly. Pre- and post-intervention assessments included shoulder strength measurements (internal/external rotation, abduction, flexion), functional movement screening, and injury tracking throughout the season.

Results demonstrated significant improvements in shoulder strength parameters and a notable reduction in shoulder injury rates in the resistance training group compared to both comparison groups. The resistance training group showed a 23.5% increase in external rotation strength, 19.8% improvement in internal rotation strength, and 67% reduction in shoulder injury incidence compared to the control group. These findings indicate that implementing a targeted resistance training program can effectively enhance shoulder strength and serve as a preventive measure against common volleyball-related shoulder injuries. The study emphasizes the critical importance of incorporating evidence-based strength training protocols in school volleyball programs to optimize athletic performance while prioritizing player safety and long-term shoulder health.