Document Detail

Influence of pedalling rate on the energy cost of cycling in humans.
MedLine Citation:
PMID:  12436285     Owner:  NLM     Status:  MEDLINE    
To determine the optimal pedalling rate that minimises both the oxygen consumption (fV(O2,min)) and the energy cost of cycling (f(Cr,min)), 22 male subjects were asked to cycle on an ergometer on five occasions of 4 min each at a constant power output of 150 W and at pedalling rates of 40, 60, 80, 100 and 120 rpm. The oxygen consumption (V(O2) in millilitres per minute per kilogram) and the energy cost (Cr in joules per kilogram per metre) were determined during each period. The individual V(O2)-pedalling rate and Cr-pedalling rate relationships were fitted by parabolic regressions which allowed the determination for each individual of fV(O2,min) [mean (SD) 57.0 (4.9) rpm] and f(Cr,min) [101.1 (3.2) rpm], respectively. Contrary to the values obtained for fV(O2,min), those for f(Cr,min) were in agreement with the pedalling rates (90-110 rpm) usually selected in road cycling. It is therefore suggested that the minimisation of Cr is the main factor that determines the pedalling rate in field conditions. The lack of a significant correlation between fV(O2,min) and f(Cr,min) further indicated that, although fV(O2,min) is often used for determining the metabolic capacities of subjects, f(Cr,min) is a better index of optimal mechanical parameters of cycling in field conditions.
Alain Belli; Frédérique Hintzy
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Publication Detail:
Type:  Journal Article     Date:  2002-09-13
Journal Detail:
Title:  European journal of applied physiology     Volume:  88     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2002-11-18     Completed Date:  2003-06-13     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  158-62     Citation Subset:  IM    
Département de Sciences et Techniques des Activités Physiques et Sportives, Laboratoire de Physiologie - Groupement d'Intérêt Public Exercice, Hôpital St Jean Bonnefonds, Université de St Etienne, France.
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MeSH Terms
Bicycling / physiology*
Energy Metabolism*
Exercise Test
Oxygen Consumption
Comment In:
Eur J Appl Physiol. 2003 Sep;90(1-2):219-20; author reply 221-2   [PMID:  12883900 ]
Eur J Appl Physiol. 2003 Sep;90(1-2):218; author reply 221-2   [PMID:  12883899 ]

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

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