| Pulmonary oxygen uptake and muscle deoxygenation kinetics during recovery in trained and untrained male adolescents. | |
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MedLine Citation:
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PMID: 21409403 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Previous studies have demonstrated faster pulmonary oxygen uptake ([Formula: see text]) kinetics in the trained state during the transition to and from moderate-intensity exercise in adults. Whilst a similar effect of training status has previously been observed during the on-transition in adolescents, whether this is also observed during recovery from exercise is presently unknown. The aim of the present study was therefore to examine [Formula: see text] kinetics in trained and untrained male adolescents during recovery from moderate-intensity exercise. 15 trained (15 ± 0.8 years, [Formula: see text] 54.9 ± 6.4 mL kg(-1) min(-1)) and 8 untrained (15 ± 0.5 years, [Formula: see text] 44.0 ± 4.6 mL kg(-1) min(-1)) male adolescents performed two 6-min exercise off-transitions to 10 W from a preceding "baseline" of exercise at a workload equivalent to 80% lactate threshold; [Formula: see text] (breath-by-breath) and muscle deoxyhaemoglobin (near-infrared spectroscopy) were measured continuously. The time constant of the fundamental phase of [Formula: see text] off-kinetics was not different between trained and untrained (trained 27.8 ± 5.9 s vs. untrained 28.9 ± 7.6 s, P = 0.71). However, the time constant (trained 17.0 ± 7.5 s vs. untrained 32 ± 11 s, P < 0.01) and mean response time (trained 24.2 ± 9.2 s vs. untrained 34 ± 13 s, P = 0.05) of muscle deoxyhaemoglobin off-kinetics was faster in the trained subjects compared to the untrained subjects. [Formula: see text] kinetics was unaffected by training status; the faster muscle deoxyhaemoglobin kinetics in the trained subjects thus indicates slower blood flow kinetics during recovery from exercise compared to the untrained subjects. |
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Authors:
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Simon Marwood; Denise Roche; Max Garrard; Viswanath B Unnithan |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-3-16 |
Journal Detail:
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Title: European journal of applied physiology Volume: - ISSN: 1439-6327 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-3-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Sport and Exercise Physiology Research Team, Liverpool Hope University, Liverpool, UK, marwoos@hope.ac.uk. |
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