Effect of plyometric training on sand versus grass on muscle soreness and selected sport-specific performance variables in hockey players

Purpose. The purpose of this study was to compare the effects of a 4-week plyometric training on two different surfaces, sand and grass on muscle soreness and selected sport-specific performance variables in national level hockey players. Methods. Subjects were randomly divided into two groups- grass training group (N=20) and sand training group (N=20). After the baseline measurements of strength, endurance, balance, and agility, plyometric training was given for 4-weeks,three sessions per week.Muscle soreness was assessed at the end of each training session on a 7-point likert scale.Post-readings of strength, endurance, balance and agility were taken after the 4-week training programme. Findings. Data when compared after plyometric training revealed no significant changes between two groups (p>0.05), however players in the sand group experienced less muscle soreness (p<0.05) than grass group. There was significant improvement (p