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Power-time, force-time, and velocity-time curve analysis during the jump squat: impact of load
Prue Cormie1, Jeffrey M McBride, Grant O McCaulley
1School of Exercise, Biomedical and Health Sciences, Edith Cowan University, Perth, Western Australia.
Abstract:
The purpose of this investigation was to examine the impact of load on the power-, force- and velocity-time curves during the jump squat. The analysis of these curves for the entire movement at a sampling frequency of 200-500 Hz averaged across 18 untrained male subjects is the most novel aspect of this study. Jump squat performance was assessed in a randomized fashion across five different external loads: 0, 20, 40, 60, and 80 kg (equivalent to 0 +/- 0, 18 +/- 4, 37 +/- 8, 55 +/- 12, 74 +/- 15% of 1RM, respectively). The 0-kg loading condition (i.e., body mass only) was the load that maximized peak power output, displaying a significantly (p
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