Eight-week interventional study to evaluate whether lower-body plyometric training alters serum creatine phosphokinase (CPK) and creatinine levels in female collegiate volleyball players. Sixty participants were randomized to experimental (plyometrics twice weekly) or control (routine volleyball) groups. Blood sampling occurred at baseline; days 2, 4, and 6; and weeks 1, 2, 4, 6, and 8.
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Serum CPK (U/L)
Timeframe: Baseline; 2, 4, 6 days; 1, 2, 4, 6, 8 weeks