Document Detail


A 'new' method to normalise exercise intensity.
MedLine Citation:
PMID:  21563028     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Exercise intensity has traditionally been described, prescribed and normalised as a fraction (%) of the maximal oxygen uptake ( V˙O (2max)). We hypothesised that the extent of inter-subject variability in the physiological responses to exercise would be greater when work rates were prescribed using % V˙O (2max) as compared to % 'delta' (Δ), a method of normalising exercise intensity in which both the gas exchange threshold (GET) and the V˙O (2max) are considered. 9 men completed a ramp incremental test on a cycle ergometer to establish the GET and V˙O (2max). Subsequently, subjects completed 6 constant-work-rate exercise bouts at intensities corresponding to: 50%, 70% and 90% V˙O (2max); and 60% GET, 40% Δ (that is, 40% of the difference between the GET and V˙O (2max)) and 80% Δ. For all bouts, exercise was continued for 20 min or until task failure if this occurred sooner. When exercise was prescribed using the % Δ concept, there were significant reductions in the inter-subject variability in pulmonary gas exchange, blood lactate accumulation, heart rate, and ratings of perceived exertion (all P < 0.05). In conclusion, the % Δ concept resulted in more consistent inter-subject physiological responses to constant-work-rate exercise and should be used in preference to % V˙O (2max) to more effectively normalise exercise intensity.
Authors:
K E Lansley; F J Dimenna; S J Bailey; A M Jones
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-05-11
Journal Detail:
Title:  International journal of sports medicine     Volume:  32     ISSN:  1439-3964     ISO Abbreviation:  Int J Sports Med     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-07-05     Completed Date:  2011-11-07     Revised Date:  2011-12-14    
Medline Journal Info:
Nlm Unique ID:  8008349     Medline TA:  Int J Sports Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  535-41     Citation Subset:  IM    
Copyright Information:
© Georg Thieme Verlag KG Stuttgart · New York.
Affiliation:
Exeter University, Sport and Health Sciences, Exeter, United Kingdom.
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MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling / physiology
Exercise Test / methods*
Exercise Tolerance / physiology*
Humans
Male
Oxygen Consumption / physiology*
Physical Exertion / physiology
Pulmonary Gas Exchange
Young Adult
Comments/Corrections
Comment In:
Int J Sports Med. 2011 Nov;32(11):902   [PMID:  22065313 ]

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


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