DIFFERENCES IN RSI AND PEAK GROUND REACTION FORCE FOR DROP REBOUND JUMPS FROM A HANG AND BOX FOR FEMALE SUBJECTS

  • B. McGowan
  • R. Jensen
  • E. Petushek
Keywords: plyometrics, stretch shorten cycle, reactive strength index, contact time

Abstract

The aim of this study was to examine differences between drop jump rebound from a box (DJB) and hanging position (DJH). The volunteers were 14 college aged women who were healthy and physically active. Jumps were assessed from a 30 cm drop onto a force platform. Jump height, contact time, reactive strength index, and peak vertical ground reaction force were compared for the two jumps using a Paired T-test. There were no significant differences in peak ground reaction force or jump height between the DJB and DJH (p > 0.05). Contact time was found to be less (p = 0.033) and RSI higher (p = 0.012) for the DJB. Thus, the DJB would be recommended for power training over the DJH. The results of the current study may aid coaches to prescribe the optimal drop rebound jump position for the training of their athletes.
Section
Coaching and Sports Activities