Allometric scaling of uphill cycling performance

Jobson, S.A. and Woodside, J. and Passfield, L. and Nevill, A.M. (2008) Allometric scaling of uphill cycling performance. International Journal of Sports Medicine, 29 (9). pp. 753-757. ISSN 0172-4622. (The full text of this publication is not available from this repository)

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Official URL
http://dx.doi.org/10.1055/s-2007-989441

Abstract

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 (V)over dotO(2max).m(-1.24))(0.55) and (RMPmax.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 (mc). Uphill cycling speed was proportional to (V)over dotO(2max).m(-1.24))(0.55) and (RMPmax.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.

Item Type: Article
Uncontrolled keywords: allometric modelling; body size; road cycling; oxygen uptake; power output
Subjects: H Social Sciences
Divisions: Faculties > Social Sciences > School of Sport and Exercise Studies
Depositing User: Jane Griffiths
Date Deposited: 22 Apr 2009 08:33
Last Modified: 16 Dec 2011 11:03
Resource URI: http://kar.kent.ac.uk/id/eprint/15726 (The current URI for this page, for reference purposes)
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