VERTICAL JUMP PERFORMANCE DURING VIDEO SIMULATED BLOCKING AND MAXIMAL EFFORT JUMPING IN FEMALE COLLEGIATE VOLLEYBALL PLAYERS

  • Kimitake Sato
  • Monique Mokha
Keywords: reactive timing, self-selected timing, vertical jump, volleyball block

Abstract

This study’s purpose was to compare jump height, velocity and force production between video simulated blocking, [reactive timing (RT) jump], and maximal effort vertical jumping, [self-select timing (SST) jump]. 10 female collegiate volleyball players performed both jumps onto a force plate in a laboratory while being videotaped with one camera. Jump heights(cm), velocities(m/s), and forces(%BW) were calculated using Peak Motus. A RMMANOVA identified differences in the dependent variables across the two jumps. Jump height and peak velocity were significantly higher in the SST jump, 52.20+8.43 v 38.33+11.76 cm, and 5.69+0.71 v 5.4+0.61 m/s, respectively, p<.05. No differences were found in peak vGRFs, p<.05. Results indicate jump characteristics of the maximal effort VJ do not mimic those of a simulated volleyball block.
Published
2007-12-12