Biology of Sport
pISSN 0860-021X    eISSN 2083-1862
Archival Issues
Volume 34, 2017
Volume 33, 2016
Volume 32, 2015
Volume 31, 2014
Volume 30, 2013
Volume 29, 2012
Volume 28, 2011
Volume 27, 2010
Volume 26, 2009
Volume 25, 2008
Volume 24, 2007
Volume 23, 2006
Volume 22, 2005
Volume 21, 2004
Volume 20, 2003
Archival Issues 1984-1998
Information for Authors
Special Information
Journal Abstract
The effect of drop height and body mass on drop jump intensity
H Makaruk, T Sacewicz
Biol Sport 2011; 28(1):63-67
ICID: 935873
Article type: Original article
IC™ Value: 10.06
Abstract provided by Publisher
Given the nature of plyometric exercises (which overload muscles and joints), intensity control plays an important role in training. Therefore, the aim of this study was to determine the effect of drop height and mass changes on exercise intensity expressed through ground reaction forces (GRF) and the rate of eccentric force development (E-RFD). Nine elite male athletes representing 1st league athletics clubs volunteered to serve as subjects for the study. They performed unloaded and loaded drop jumps from 0.2 m, 0.4 m and 0.6 m. As for loaded jumps, loads constituted 5% and 10% of body mass (BM). It was observed that with an increase in drop height, the values of ground reaction forces at the first peak (the contact of toes with the ground; GRF1) and at the second peak (the contact of heels with the ground; GRF2) as well as the values of E-RFD1 (measured from 0 to GRF1) and E-RFD2 (measured from 0 to GRF2) increased significantly (P<0.01). An increase in BM from 5 to 10% led to a change in the values (P<0.05) of GRF1, GRF2 and E-RFD1 but only in the case of drop jumps from 0.6 m. However, the values of these parameters in loaded drop jumps with 10% BM were lower than those with 5% BM. The study results indicate that a change in drop height is a more effective way to manipulate the intensity of drop jumps than a change in body mass.

ICID 935873

DOI 10.5604/935873

Related articles
  • in IndexCopernicus™
         stretch-shortening cycle [0 related records]
         plyometric exercises [0 related records]
         depth jumps [0 related records]
         ground reaction forces [4 related records]
         Rate of Force Development [0 related records]


    Copyright © Biology of Sport  2017
    Page created by Index Copernicus Ltd. All Rights reserved.