Data obtained from the baseline testing session of 14 subjects involved in the longitudinal study were used for the cross-sectional examination to represent the nonjumper group.

Two major comparisons were conducted: 1) an acute, cross-sectional examination comparing experienced jumpers ( jump height > 0.50 m n = 12 men's athletes) with nonjumpers ( jump height < 0.50 m n = 14 untrained men), and 2) a longitudinal examination comparing performance before and after 12 weeks of power training (training group n = 10 untrained men control group n = 8 untrained men). Thirty subjects, all men, participated in this investigation and included 12 athletes and 18 untrained men. The most novel aspect of this study was the analysis of these curves for the entire movement at a sampling frequency of 386-506 Hz averaged across 30 subjects. J Strength Cond Res 23(1): 177-186, 2009-The purpose of this investigation was to examine the impact of training on the power-, force-, and velocity-time curves of the countermovement jump (CMJ) through both cross-sectional and longitudinal comparisons. Power-time, force-time, and velocity-time curve analysis of the CMJ: impact of training. Cormie, P, McBride, JM, and McCaulley, GO.

Power on time