Download PDF
Int J Sports Med 1999; 20(5): 295-303
DOI: 10.1055/s-2007-971134
Training and Testing

© Georg Thieme Verlag Stuttgart · New York

A Comparison of Drop Jump Training Methods: Effects on Leg Extensor Strength Qualities and Jumping Performance

W. B. Young1 , C. J. Wilson2 , C. Byrne1
  • 1School of Human Movement and Sport Sciences, University of Ballarat, Victoria, Australia
  • 2The Centre for Exercise Science and Sport Management, Southern Cross University, Australia
Further Information

Publication History

Publication Date:
09 March 2007 (online)

Also available at
  PDF Download  Permissions and Reprints

The purpose of this study was to determine the effects of two drop jump (DJ) training methods on the strength qualities of the leg extensors and vertical jumping performance. Thirty-five males were allocated to either a control group or one of two training groups, required to perform 72 - 90 DJ per week for 6 weeks: DJ for maximum rebound height (DJ-H) or DJ for maximum height and minimum ground contact time (DJ-H/t). The subjects were tested before and after the training on leg extensor function for maximum strength and speed-strength under concentric and stretch-shortening cycle muscular actions, and on vertical jumps from a standing position and) a run-up. ANOVA with repeated measures showed that a 20 % gain in reactive strength (RS) for the DJ-H/t group was significantly greater (p < 0.05) than the other groups, however, this did not transfer to vertical jumping performance. The DJ-H group did not achieve a significant training effect. It was concluded that DJ-H/t method was effective for the development of RS, but training with DJ-H was not intense and/or specific enough to stimulate gains in strength qualities of the leg extensors or jumping performance.

Key words

Plyometrics - muscular power - training - reactive strength

      >