Document Detail


The relationship between power and the time to achieve .VO(2max).
MedLine Citation:
PMID:  11932583     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
PURPOSE: The severe exercise intensity domain may be defined as that range of work rates over which .VO(2max) can be elicited during constant-load exercise. The purpose of this study was to help characterize the .VO(2) response within this domain. METHODS: Eleven participants performed cycle ergometer exercise tests to fatigue at several discrete work rates between 95% and 135% of the maximum power (P(max)) achieved during an incremental exercise test. RESULTS: As previously demonstrated, the relationship between power and time to fatigue was hyperbolic. The asymptote of power (critical power, P(critical)) was 198 +/- 44 W. The rapidity of the .VO(2) response increased systematically at higher work rates such that the relationship between power and time to .VO(2max) was also well fit by a hyperbola. The power asymptote of this relationship (196 +/- 42 W) was not different from P(critical)(P > 0.05). The two hyperbolic relationships converged at 342 +/- 70 W (136% P(max)). CONCLUSION: These data suggest that, for this population of male and female university students, the upper boundary of the severe exercise intensity domain is approximately 136% P(max). This upper boundary is the highest work rate for which exercise duration is prolonged sufficiently (in this study, 136 +/- 17 s) to allow .VO(2) to rise to its maximal value. The lower boundary for severe exercise is just above P(critical), which is the highest work rate that is sustainable for a prolonged duration and that will not elicit .VO(2max).
Authors:
David W Hill; David C Poole; Jimmy C Smith
Related Documents :
19952473 - Effect of changes in left ventricular diastolic function during exercise on exercise to...
17306293 - Respiratory concerts revealed by scanning microrespirography in a termite prorhinoterme...
18585503 - Exercise capacity and biventricular function in adult patients with repaired tetralogy ...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  34     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2002 Apr 
Date Detail:
Created Date:  2002-04-04     Completed Date:  2002-04-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  709-14     Citation Subset:  IM; S    
Affiliation:
Department of Kinesiology, University of North Texas, Denton, TX 76203-1337, USA. dhill@unt.edu
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Energy Metabolism / physiology
Exercise / physiology*
Exercise Test
Female
Humans
Kinetics
Male
Muscle Fatigue / physiology*
Oxygen Consumption / physiology*
Physical Exertion / physiology*
Time Factors

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


Previous Document:  Aerobic training and cardiovascular responses at rest and during exercise in older men and women.
Next Document:  Effects of resistance exercise bouts of different intensities but equal work on EPOC.