| Allometric scaling of uphill cycling performance. | |
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MedLine Citation:
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PMID: 18213539 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Previous laboratory-based investigations have identified optimal body mass scaling exponents in the range 0.79-0.91 for uphill cycling. The purpose of this investigation was to evaluate whether or not these exponents are also valid in a field setting. A proportional allometric model was used to predict the optimal power-to-mass ratios associated with road-based uphill time-trial cycling performance. The optimal power function models predicting mean cycle speed during a 5.3 km, 5.4% road hill-climb time-trial were (VO(2max) x m(-1.24))(0.55) and (RMP(max) x m(-1.04))(0.54), explained variance being 84.6% and 70.5%, respectively. Slightly higher mass exponents were observed when the mass predictor was replaced with the combined mass of cyclist and equipment (m(C)). Uphill cycling speed was proportional to (VO(2max) x m(C)(-1.33))(0.57) and (RMP(max) x m(C)(-1.10))(0.59). The curvilinear exponents, 0.54-0.59, identified a relatively strong curvilinear relationship between cycling speed and energy cost, suggesting that air resistance remains influential when cycling up a gradient of 5.4%. These results provide some support for previously reported uphill cycling mass exponents derived in laboratories. However, the exponents reported here were a little higher than those reported previously, a finding possibly explained by a lack of geometric similarity in this sample. |
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Authors:
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S A Jobson; J Woodside; L Passfield; A M Nevill |
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Publication Detail:
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Type: Journal Article Date: 2008-01-22 |
Journal Detail:
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Title: International journal of sports medicine Volume: 29 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 2008 Sep |
Date Detail:
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Created Date: 2008-08-06 Completed Date: 2009-01-16 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: Germany |
Other Details:
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Languages: eng Pagination: 753-7 Citation Subset: IM |
Affiliation:
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Department of Sports Studies, University of Winchester, Winchester, United Kingdom. Simon.Jobson@winchester.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Altitude Bicycling / physiology* Ergometry Exercise Test Exercise Tolerance / physiology* Humans Male Muscle Contraction / physiology* Muscle Strength / physiology Muscle, Skeletal / physiology* Oxygen Consumption / physiology* Pilot Projects Task Performance and Analysis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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