Document Detail


.VO2 response in supramaximal cycling time trial exercise of 750 to 4000 m.
MedLine Citation:
PMID:  19092684     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: Limited research has been done on the .VO2 response to time trial exercise in the supramaximal domain or during free range exercise typical of competition. The present study was designed to measure and to model the .VO2 response during supramaximal time trial exercise. METHODS: Well-trained cyclists (n = 9) performed a 1-min incremental exercise test to obtain maximal power output (P (.VO2max)) and four cycle ergometer time trials of different distances (750, 1500, 2500, and 4000 m). Athletes were instructed to finish in as little time as possible. .VO2 was measured breath-by-breath and modeled monoexponentially over the first 54 s (750 m) or 114 s (1500, 2500, and 4000 m) of the time trials. RESULTS: Mean P (.VO2max) in the incremental test was 383 +/- 28 W. Mean .VO(2max) was 4.5 +/- 0.2 L.min(-1). All time trials were characterized by an initial burst in power output during the first 15 s (175 +/- 23%, 149 +/- 14%, 145 +/- 14%, 139 +/- 10% P (.VO2max) being largest for 750 m. Simultaneously, the mean response time was significantly smaller in 750 m compared with all other trials (18.8 +/- 2.2, 20.9 +/- 1.9, 20.8 +/- 1.5, and 21.2 +/- 2.2 s). CONCLUSION: Near maximal values of .VO2 can be reached within 2 min of strenuous exercise. The larger initial burst in power output in 750 m was accompanied by a faster .VO2 response and seems to be of importance to trigger the aerobic system maximally.
Authors:
Florentina J Hettinga; Jos J De Koning; Carl Foster
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  41     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2008-12-24     Completed Date:  2009-05-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  230-6     Citation Subset:  IM; S    
Affiliation:
Faculty of Human Movement Sciences, Research Institute MOVE, VU University Amsterdam, Van der Boechorststraat 9, Amsterdam, The Netherlands. f.hettinga@fbw.vu.nl
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Bicycling / physiology*
Competitive Behavior
Exercise Test
Exercise Tolerance / physiology*
Humans
Isometric Contraction / physiology*
Male
Oxygen Consumption / physiology*
Prospective Studies
Resistance Training*
Spirometry
Time Factors

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


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