Determining the best combination of ground reaction force parameters for maximizing power during the power snatch

The purpose of this study was to determine the best combination of ground reaction force (GRF) parameters for maximizing power during the power snatch (PS). Ten skilled weightlifters completed a total of five PS trials with 60% of one repetition maximum. Vertical GRF (VGRF), horizontal GRF (HGRF), rate of vertical force development (VFD), rate of horizontal force development (HFD), and horizontal center-of-pressure (HCOP) were selected as the GRF parameters. Multiple-regression (stepwise) analysis was conducted to determine the best combination with the GRF parameters being independent variables. VGRF, VFD, and HCOP were identified as significant predictors. Increased VGRF and decreased VFD and HCOP would increase power during the PS. In conclusion, a horizontal movement is inevitable as a counter movement before second pull during the PS. However, it needs to be minimized as increased VFD and HCOP would have negative impacts on power during the PS.