Document Detail


A new method to measure rolling resistance in treadmill cycling.
MedLine Citation:
PMID:  20686997     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to evaluate a new method of measuring rolling resistance in treadmill cycling and to establish its sensitivity and reproducibility. One participant was asked to keep a bicycle in equilibrium on a treadmill without pedalling at a constant speed of 5.56 m x s(-1), which was held in place in the front by a dynamometer. For each condition, the method consisted of 11 measurements of the force required to hold the cycle at different treadmill slopes (0-10%, increment 1%). The coefficient of rolling resistance was calculated based on the forces applied to the bicycle in equilibrium. To test the sensitivity of the method, the bicycle was successively equipped with three tyre types (700 x 28, 700 x 23, 700 x 22) and inflation pressure was set at 150, 300, 600, 900, and 1100 kPa. To test the reproducibility of the method, a second experimenter repeated all measurements done with the 700 x 23 tyres. The method was sensitive enough to detect an effect of both tyre type and inflation pressure (P < 0.001: two-way ANOVA). The measurement of the coefficient of rolling resistance by two separate experimenters resulted in a small bias of 0.00029 (95% CI, -0.00011 to 0.00068). In conclusion, the new method is sensitive and reliable, as well as being simple and affordable.
Authors:
Yves Henchoz; Giacomo Crivelli; Fabio Borrani; Grégoire P Millet
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Journal of sports sciences     Volume:  28     ISSN:  1466-447X     ISO Abbreviation:  J Sports Sci     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-08-19     Completed Date:  2010-12-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405364     Medline TA:  J Sports Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  1043-6     Citation Subset:  IM    
Affiliation:
Institute of Sports Sciences, University of Lausanne, Lausanne, Switzerland. yves.henchoz@unil.ch
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MeSH Terms
Descriptor/Qualifier:
Adult
Exercise Test*
Humans
Male
Reproducibility of Results

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


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