Document Detail


Estimation of VO2max from the ratio between HRmax and HRrest--the Heart Rate Ratio Method.
MedLine Citation:
PMID:  14624296     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of training and/or ageing upon maximal oxygen uptake ( VO(2max)) and heart rate values at rest (HR(rest)) and maximal exercise (HR(max)), respectively, suggest a relationship between VO(2max) and the HR(max)-to-HR(rest) ratio which may be of use for indirect testing of VO(2max). Fick principle calculations supplemented by literature data on maximum-to-rest ratios for stroke volume and the arterio-venous O(2) difference suggest that the conversion factor between mass-specific VO(2max) (ml.min(-1).kg(-1)) and HR(max).HR(rest)(-1) is approximately 15. In the study we experimentally examined this relationship and evaluated its potential for prediction of VO(2max). VO(2max) was measured in 46 well-trained men (age 21-51 years) during a treadmill protocol. A subgroup ( n=10) demonstrated that the proportionality factor between HR(max).HR(rest)(-1) and mass-specific VO(2max) was 15.3 (0.7) ml.min(-1).kg(-1). Using this value, VO(2max) in the remaining 36 individuals could be estimated with an SEE of 0.21 l.min(-1) or 2.7 ml.min(-1).kg(-1) (approximately 4.5%). This compares favourably with other common indirect tests. When replacing measured HR(max) with an age-predicted one, SEE was 0.37 l.min(-1) and 4.7 ml.min(-1).kg(-1) (approximately 7.8%), which is still comparable with other indirect tests. We conclude that the HR(max)-to-HR(rest) ratio may provide a tool for estimation of VO(2max) in well-trained men. The applicability of the test principle in relation to other groups will have to await direct validation. VO(2max) can be estimated indirectly from the measured HR(max)-to-HR(rest) ratio with an accuracy that compares favourably with that of other common indirect tests. The results also suggest that the test may be of use for VO(2max) estimation based on resting measurements alone.
Authors:
Niels Uth; Henrik Sørensen; Kristian Overgaard; Preben K Pedersen
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Publication Detail:
Type:  Journal Article     Date:  2003-11-18
Journal Detail:
Title:  European journal of applied physiology     Volume:  91     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2003-12-23     Completed Date:  2004-11-02     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  111-5     Citation Subset:  IM    
Affiliation:
Department of Sport Science, University of Aarhus, Katrinebjergvej 89C, 8200 N Aarhus, Denmark. nielsuth@idraet.au.dk
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MeSH Terms
Descriptor/Qualifier:
Adult
Aging / physiology
Exercise / physiology
Exercise Test
Heart Rate / physiology*
Humans
Male
Oxygen Consumption / physiology*
Rest / physiology
Statistics as Topic / methods
Stroke Volume / physiology
Comments/Corrections
Erratum In:
Eur J Appl Physiol. 2005 Jan;93(4):508-9

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