EFFECTS OF AN INCLINED BOARD ON THE TAKEOFF MOTION OF LONG JUMP

  • H. Koyama
  • M. Ae
  • K. Hoga
  • Y. Muraki
Keywords: long jump, training tool, takeoff, inclined board

Abstract

The purpose of this study was to investigate effects of the inclined board on the motion during the takeoff and the preparatory phases in long jump and to obtain suggestion to effectively use the inclined board as a training tool. Five male long jumpers were videotaped with a high speed VTR camera. Three kinds of trials were performed with a middle length of run-up: Normal 1 trial, the subject's own manner; Board trial, with the upward inclined board; Normal 2 trial, the subject's own manner; in turn. In Board trail, the forward rotation velocity of the body and the run-up speed during the preparatory phase were larger than those of Normal 1 trial. In Board trial, the timing of the backward lean of the trunk was delayed and the change in the knee angle implied that the jumpers could step up to the takeoff. It is suggested that the inclined board is an effective training tool to learn a quick takeoff motion with less decrease in the horizontal velocity.
Published
2008-01-28
Section
Equipment / Instrumentation