| Longitudinal changes in the oxygen uptake kinetic response to heavy-intensity exercise in 14- to 16-year-old boys. | |
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MedLine Citation:
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PMID: 20332541 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined longitudinal changes in the pulmonary oxygen uptake (pVO(2)) kinetic response to heavy-intensity exercise in 14-16 yr old boys. Fourteen healthy boys (age 14.1 +/- 0.2 yr) completed exercise testing on two occasions with a 2-yr interval. Each participant completed a minimum of three 'step' exercise transitions, from unloaded pedalling to a constant work rate corresponding to 40% of the difference between the pVO(2) at the gas exchange threshold and peak pVO(2) (40% Delta). Over the 2-yr period a significant increase in the phase II time constant (25 +/- 5 vs. 30 +/- 5 s; p = .002, omega(2) = 0.34), the relative amplitude of the pVO(2) slow component (9 +/- 5 vs. 13 +/- 4%; p = .036, omega(2) = 0.14) and the pVO(2) gain at end-exercise (11.6 +/- 0.6 vs. 12.4 +/- 0.7 mL x min(-1) x W(-1); p < .001, omega(2) = 0.42) were observed. These data indicate that the control of oxidative phosphorylation in response to heavy-intensity cycling exercise is age-dependent in teenage boys. |
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Authors:
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Brynmor C Breese; Craig A Williams; Alan R Barker; Joanne R Welsman; Samantha G Fawkner; Neil Armstrong |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pediatric exercise science Volume: 22 ISSN: 0899-8493 ISO Abbreviation: Pediatr Exerc Sci Publication Date: 2010 Feb |
Date Detail:
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Created Date: 2010-03-24 Completed Date: 2011-01-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8909729 Medline TA: Pediatr Exerc Sci Country: United States |
Other Details:
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Languages: eng Pagination: 69-80 Citation Subset: IM |
Affiliation:
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Children's Health and Exercise Research Center, University of Exeter, Exeter, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Age Factors Bicycling / physiology* Confidence Intervals Exercise Tolerance Humans Isometric Contraction / physiology* Longitudinal Studies Male Mitochondria, Muscle / physiology* Mitochondrial Proteins Muscle, Skeletal / physiology* Oxidative Phosphorylation* Oxygen Consumption / physiology* Protein Biosynthesis Time Factors |
| Chemical | |
Reg. No./Substance:
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0/Mitochondrial Proteins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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