| Ventilatory efficiency in juvenile elite cyclists. | |
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MedLine Citation:
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PMID: 22840997 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVES: Ventilation ( [Formula: see text] ) as a function of CO(2) output, and oxygen uptake ( [Formula: see text] ) as a function of [Formula: see text] , define cardio-respiratory efficiency, although few data compare efficiency with maximum oxygen uptake ( [Formula: see text] ), or consider reproducibility. Currently there are no data for trained juveniles. DESIGN: Twenty-five trained juvenile cyclists (mean age 14.7 years), performed maximal exercise testing on two occasions, separated by 16 weeks. METHODS: [Formula: see text] vs. [Formula: see text] slope, oxygen uptake efficiency slope, and [Formula: see text] were measured during cycle ergometer exercise to volitional exhaustion on two occasions, 16 weeks apart. RESULTS: Mean (SD) [Formula: see text] vs. [Formula: see text] slope, oxygen uptake efficiency slope, and [Formula: see text] were 28.14 (3.89), 4.16 (0.73), and 75.4 (8.9) mlkg(-1)min(-1) on visit 1, and 27.92 (4.63), 4.22 (0.76), and 73.6 (9.3) mlkg(-1)min(-1) on visit 2. Good reproducibility (differences ≤2.4%), but poor correlations (r≤0.29) between efficiency and [Formula: see text] were recorded. CONCLUSIONS: Reproducibility of efficiency measures was comparable to [Formula: see text] , however, poor associations between efficiency and [Formula: see text] suggested independence. Efficient ventilation may be of limited importance in determining the [Formula: see text] in a trained juvenile cyclist. |
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Authors:
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Stephen J Brown; Aaron Raman; Zachary Schlader; Stephen R Stannard |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-7-26 |
Journal Detail:
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Title: Journal of science and medicine in sport / Sports Medicine Australia Volume: - ISSN: 1878-1861 ISO Abbreviation: - Publication Date: 2012 Jul |
Date Detail:
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Created Date: 2012-7-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812598 Medline TA: J Sci Med Sport Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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School of Sport and Exercise, College of Sciences, Massey University Albany, Auckland, New Zealand. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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