| Pedaling technique and energy cost in cycling. | |
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MedLine Citation:
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PMID: 20798659 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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PURPOSE: : Because cycling is an extreme endurance sport, energy saving and therefore efficiency is of importance for performance. It is generally believed that gross efficiency (GE) is affected by pedaling technique. A measurement of pedaling technique has traditionally been done using force effectiveness ratio (FE; ratio of effective force and total force). The aim of the present study was to investigate the relationship among GE, FE, and a new technique parameter, dead center (DC) size in competitive cyclists. METHOD: : Twenty-one competitive cyclists cycled for 10 min at approximately 80% V˙O2max at a freely chosen cadence (FCC). GE, FE ratio, and DC size were calculated from oxygen consumption and propulsive force recordings. RESULTS: : Mean work rate was 279 W, mean FCC was 93.1 rpm, and mean GE was 21.7%. FE was 0.47 and 0.79 after correction for inertial forces; DC was 27.3% and 25.7%, respectively. DC size correlated better with GE (r = 0.75) than with the FE ratio (r = 0.50). Multiple regressions revealed that DC sizewas the only significant (P = 0.001) predictor for GE. Interestingly, DC size and FE ratio did not correlate with each other. CONCLUSIONS: : DC size is a pedaling technique parameter that is closely related to energy consumption. To generate power evenly around the whole pedal, revolution may be an important energy-saving trait. |
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Authors:
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Stig Leirdal; Gertjan Ettema |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 43 ISSN: 1530-0315 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-03-17 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
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Languages: eng Pagination: 701-5 Citation Subset: IM; S |
Affiliation:
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Human Movement Science Programme, Norwegian University of Science and Technology, Trondheim, NORWAY. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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