Crowther, R., Spinks, W., Leicht, A., and Spinks, C. (2004) Kinematic responses to plyometric exercises conducted on compliant and non-compliant surfaces. In: Journal of Science and Medicine in Sport: 2004 Australian conference of science and medicine in sport: hot topics from the Red Centre (7(4) Supplement) p. 82. From: 2004ACSMS: 2004 Australian Conference of Science and Medicine in Sport: Hot topics from the Red Centre, 6-9 October 2004, Alice Springs, Australia.

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Abstract

Jumping is an important performance component of many sporting activities and a number of training modalities including plyometrics are used to enhance jumping performance. However, there has been little research on the effects of the jumping surface on jump kinematics. This study examined the effects of non-compliant (ground) and compliant (mini-trampoline) surfaces on the kinematics of two plyometric exercises (depth jump – DJ; countermovement jump - CMJ). Male participants (N=20; age = 21.8 (range, 19-34) yr; ht = 184.6 (±7.6) cm; mass = 83.6 (±8.2) kg) randomly performed 10 CMJ and 10 DJ on both surfaces. Kinematic data were determined via 2D high-speed (50Hz) videography. Three trials of both jumping styles conducted on each surface were randomly selected for analysis. Dependant variables included joint (ankle, knee, hip) and segment (foot, shank, thigh, trunk) ROM and joint velocity and acceleration. Two-way repeated measures ANOVA indicated significant differences (p<0.05) in DJ and CMJ joint and segment ROM and minor (non-systematic) significant differences in joint velocity and acceleration. Significant differences in DJ knee ROM on the compliant compared to the non-compliant surface indicated a reduced need to crouch, which is believed to be indicative of better plyometric technique. There were no significant differences in the time to complete either DJ or CMJ on both surfaces. A compliant jumping surface appears to elicit better jump technique and may reduce the impact on the musculoskeletal system during plyometric exercise. A compliant jumping surface may provide information on how the body responds to a well-executed plyometric exercise.

Item ID:	15975
Item Type:	Conference Item (Presentation)
ISBN:	978-1-875334-10-0
ISSN:	1440-2440
Keywords:	jumping, trampoline, biomechanics
Date Deposited:	14 Aug 2012 06:08
FoR Codes:	11 MEDICAL AND HEALTH SCIENCES > 1106 Human Movement and Sports Science > 110601 Biomechanics @ 100%
SEO Codes:	97 EXPANDING KNOWLEDGE > 970111 Expanding Knowledge in the Medical and Health Sciences @ 100%
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