Document Detail


Performance and metabolism in repeated sprint exercise: effect of recovery intensity.
MedLine Citation:
PMID:  18443815     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study investigated the effects of a moderate (MI) and a low intensity (LI) active recovery (both compared to a passive recovery) on repeated-sprint performance and muscle metabolism. Nine, male, subjects performed three repeated-sprint cycle tests (6 x 4 s sprints, every 25 s) in a semi-randomized, counter-balanced order. Recovery after each sprint for the MI and LI trials, respectively, was 60 W (approximately 35% VO(2max)) and 20 W (approximately 20% VO(2max). Biopsies were taken from the vastus lateralis pre- and immediately post-test during the MI and LI trials to determine adenosine triphosphate (ATP), phosphocreatine (PCr) and lactate (MLa(-)) content. Compared to passive, significant reductions in peak power of 3.4-6.0% were recorded in the MI trial (4 of 6 sprints; P < 0.05) and reductions of 3.5-3.7% in the LI trial (2 of 6 sprints; P < 0.05), with no differences between the two active trials. No significant differences were evident in ATP, PCr and MLa(-) between the two active recovery trials. In summary, peak power indices during the repeated-sprint test were inferior in the MI and LI active recovery trials, compared to passive. The minimal differences in performance and muscle metabolites between the MI and LI trials suggest that any low-to-moderate level of muscle activation will attenuate the resynthesis of PCr and the recovery of power output during repeated short-sprint exercise.
Authors:
Matt Spencer; Brian Dawson; Carmel Goodman; Ben Dascombe; David Bishop
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2008-04-29
Journal Detail:
Title:  European journal of applied physiology     Volume:  103     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-05-19     Completed Date:  2008-08-20     Revised Date:  2008-09-11    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  545-52     Citation Subset:  IM    
Affiliation:
School of Human Movement and Exercise Science, The University of Western Australia, Crawley, WA, Australia. Mattspencer73@hotmail.com
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MeSH Terms
Descriptor/Qualifier:
Adenosine Triphosphate / metabolism
Adult
Anaerobic Threshold / physiology
Anaerobiosis / physiology*
Bicycling / physiology*
Exercise Test
Humans
Lactic Acid / blood
Male
Muscle, Skeletal / metabolism,  physiology*
Oxygen Consumption / physiology
Phosphocreatine / blood
Chemical
Reg. No./Substance:
50-21-5/Lactic Acid; 56-65-5/Adenosine Triphosphate; 67-07-2/Phosphocreatine

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


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