Document Detail


Power absorption and production during slow, large-amplitude stretch-shorten cycle motions.
MedLine Citation:
PMID:  12012077     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to determine the important predictors of power absorption and power production during slow, large-amplitude stretch-shorten cycle (SSC) motions. The relationship between power absorption (mean eccentric power output) and production (mean concentric power output) across different inertial loads was also investigated. Fifty-four subjects with a sporting background performed concentric (CBP) and rebound bench-presses (RBP) at 40% and 80% of their one-repetition maximum (1RM). The relationship between kinematic and kinetic variables and mean eccentric power and RBP mean power output was determined using correlation and multiple regression analysis. Maximal strength was found to be the best single predictor of power absorption, explaining between 44.2% and 69.1% of the variability that was associated with mean eccentric power output for 40% and 80% 1RM loads. Stretch velocity in combination with maximal strength was found to be the best two-predictor model of power absorption ( R(2)=83.7-97.3%). The best single predictor of SSC power production was found to be concentric mean power output ( R(2)=49.2-88.0%). The utilisation of the power absorbed during the power production phase differed across loads. It was suggested that as maximal strength is more trainable than speed, training to improve power absorption might emphasise maximal strength development. It was also suggested that SSC power output might benefit from training methods that focus on concentric force development. Further research is needed to evaluate these hypotheses and whether the findings of this study are similar for fast SSC motion.
Authors:
John B Cronin; Peter J McNair; Robert N Marshall
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Publication Detail:
Type:  Journal Article     Date:  2002-03-21
Journal Detail:
Title:  European journal of applied physiology     Volume:  87     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-05-15     Completed Date:  2003-01-10     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  59-65     Citation Subset:  IM    
Affiliation:
Sport Performance Research Centre, Auckland University of Technology, Private Bag 92006, Auckland 1020, New Zealand. john.cronin@aut.ac.nz
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MeSH Terms
Descriptor/Qualifier:
Adult
Elasticity
Exercise / physiology
Female
Humans
Male
Muscle Contraction / physiology*
Weight Lifting / physiology*
Weight-Bearing / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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