Document Detail


Differences in efficiency between trained and recreational cyclists.
MedLine Citation:
PMID:  18059575     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Controversy still exists in the literature as to whether cycling experience affects gross mechanical efficiency (GME). The aim of this study was to identify differences in efficiency between trained and untrained cyclists. Thirty-two participants, 16 trained (mean+/-SD: age, 33+/-4 y; height, 1.76+/-0.05 m; mass 75+/-10 kg; Wmax, 421+/-38 W; maximal oxygen uptake, 62.6+/-7.30 mL.kg(-1).min(-1)) and 16 untrained (22+/-3 y, 175+/-0.06 m, 76+/-10 kg, 292+/-34 W, 42.6+/-7.80 mL.kg(-1).min(-1)), performed two tests of cycling efficiency. One was at the relative workloads of 50% and 60% Wmax and the other was at a fixed workload of 150 W using an electrically braked cycle ergometer. Cadence was maintained at the cyclist's preferred rate throughout. All workloads lasted 10 min with data sampling in the final 3 min. GME was calculated from the gas data. GME was found to be significantly higher in the trained cyclists across all workloads (+1.4%; p=0.03). At workloads of 60% Wmax GME was significantly lower than work at 150 W (-0.8%; p=0.04), but not significantly different from 50% Wmax. These results show that differences do exist between trained and untrained cyclists, illustrating that training experience is a factor that warrants further investigation.
Authors:
James G Hopker; Damian A Coleman; Jonathan D Wiles
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Applied physiology, nutrition, and metabolism = Physiologie appliquée, nutrition et métabolisme     Volume:  32     ISSN:  1715-5312     ISO Abbreviation:  -     Publication Date:  2007 Dec 
Date Detail:
Created Date:  2007-12-06     Completed Date:  2008-03-11     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101264333     Medline TA:  Appl Physiol Nutr Metab     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  1036-42     Citation Subset:  IM    
Affiliation:
Centre for Sports Studies, University of Kent at Medway, Chatham Maritime, Chatham, Kent ME4 4AG, UK. j.g.hopker@kent.ac.uk
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MeSH Terms
Descriptor/Qualifier:
Adult
Anaerobic Threshold
Bicycling / physiology*
Biomechanics
Carbon Dioxide / blood
Cross-Sectional Studies
Ergometry
Female
Humans
Male
Oxygen / blood
Oxygen Consumption / physiology
Physical Fitness / physiology*
Pilot Projects
Chemical
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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


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