A potential correlation between joint kinetics and power output exists during the power clean. This study investigated correlations between lower extremity (hip, knee, and ankle) net joint torques (NJT) and whole body power (WBP) during the power clean. Ten weightlifters (five males and five females) performed five trials of the power clean with 60% of one repetition maximum. Peak NJT and WBP values were extracted through a three-dimensional motion analysis. Pearson correlation coefficients were obtained to observe possible correlations. Multiple-regression (stepwise) analysis was also conducted to identify the best predictor of WBP during the power clean with the hip, knee, and ankle NJT being the independent variables. It appeared that hip and knee NJT showed significant positive correlations with WBP (r = .29 - .33, p < .05), but no significant inter-correlation was observed among lower extremity NJT. Knee NJT appeared to the best predictor of WBP during the power clean, followed by hip NJT. Practically, this study suggested that the developments of hip and knee extensor muscle action would help weightlifters improve WBP during the power clean.
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