Document Detail


Scaling behaviour of VO2 in athletes and untrained individuals.
MedLine Citation:
PMID:  17612862     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: The present study analysed the allometric relationship (MR = a . M(b)) between human metabolic rate (MR), ranging from resting to maximal metabolic conditions, and body mass (M ), both in athletes of different specialization and untrained individuals. SUBJECTS AND METHODS: Two hundred and seventy male athletes and 43 untrained men performed a continuous incremental test to volitional exhaustion on a motorized treadmill. Metabolic rate (i.e. VO2) was measured during resting (VO2REST), sub-maximal (walking at 5 km h(-1) VO2WALK; running at 7.5 km h(-1) VO2RUN; ventilatory anaerobic threshold VO2VT) and maximal exercise conditions (maximum oxygen uptake VO2MAX). RESULTS: A significant difference (p < 0.001) in the MR-body mass relationships between athletes and controls was found. For the control group, the mass exponent b exhibited a non-significant (p = 0.37) increase with increasing metabolic demand (b = 0.69, 0.76, 0.76, 0.84, and 0.89, for VO2REST, VO2WALK, VO2RUN, VO2VT, and VO2MAX, respectively). In contrast, the corresponding mass exponent for the athletic group significantly (p < 0.01) decreased when moving from resting to maximal metabolic conditions (b = 0.98, 0.88, 0.80, 0.69, and 0.67). CONCLUSION: These results indicate that the recently proposed allometric cascade model may be valid in describing the scaling behaviour of MR in untrained individuals, but not in athletes of different specialization.
Authors:
Goran Markovic; Vlatko Vucetic; Alan M Nevill
Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Annals of human biology     Volume:  34     ISSN:  0301-4460     ISO Abbreviation:  Ann. Hum. Biol.     Publication Date:    2007 May-Jun
Date Detail:
Created Date:  2007-07-06     Completed Date:  2007-09-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0404024     Medline TA:  Ann Hum Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  315-28     Citation Subset:  IM    
Affiliation:
Faculty of Kinesiology, Department of Kinesiology of Sport, University of Zagreb, Croatia.
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MeSH Terms
Descriptor/Qualifier:
Adult
Basal Metabolism*
Body Mass Index
Body Size
Humans
Male
Oxygen Consumption*
Physical Exertion / physiology*
Sports / physiology*

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