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| Research article summary (published 30 Jan 2003): |
Effect of elastic-cord towing on the kinematics of the acceleration phase of sprinting.
Full Abstract
We studied the specificity of elastic-cord towing by measuring selected kinematics of the acceleration phase of sprinting. Nine collegiate sprinters ran two 20-m maximal sprints (MSs) and towed sprints (TSs) that were recorded on high-speed video (180 Hz). Sagittal plane kinematics of a 4-segment model of the right side of the body were digitized for a complete stride at the 15-m point for the fastest trial. Significant (p < 0.001) differences were observed for horizontal velocity of the center of mass (CoM), stride length (SL), and horizontal distance from the CoM of the foot to the CoM of the body. There was no significant difference in stride rate between the MS and TS conditions. Omega-squared analysis showed that elastic-cord towing accounted for most of the variance in acute changes in horizontal velocity (73%), SL (68%), and horizontal position of the CoM at foot contact (64%). Elastic-cord tow training resulted in significant acute changes in sprint kinematics in the acceleration phase of an MS that do not appear to be sprint specific. More research is needed on the specificity of TS training and long-term effects on sprinting performance.
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Author information
Author/s: Corn, RodneyY J (RJ); Knudson, Duane (D);
Affiliation: Department of Education, National Academy of Sports Medicine, Calabasas, California 91302, USA.
Journal and publication information
Publication Type: Journal Article
Journal: Journal of strength and conditioning research / National Strength & Conditioning Association (J Strength Cond Res), published in United States. (Language: eng)
Reference: 2003-Feb; vol 17 (issue 1) : pp 72-5
Dates: Created 2003/02/12; Completed 2003/05/23; Revised 2004/11/17;
PMID: 12580659, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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