| Maximal oxygen uptake, ventilatory thresholds and mechanical power during cycling in tropical climate in Guadeloupean elite cyclists. | |
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MedLine Citation:
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PMID: 20096632 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The Tropical climate imposes a high level of physiological stress, which could modify the target heart rate in training load prescription, as the recommendations are often determined by maximal oxygen uptake testing in temperature-neutral laboratories. To test this hypothesis, 7 high-level cyclists performed two randomised maximal tests in neutral (19.2±0.9°C; 51.7±1.3% RH) and Tropical environment (25.8±1.1°C; 63.7±2.3% RH). Neither maximal oxygen uptake nor ventilatory threshold was influenced by the environmental conditions. However, ventilation (p<0.005) and the respiratory equivalent in O(2) (p<0.05) were significantly higher in the Tropical environment, whereas maximal power output and the time to attain maximal oxygen uptake were significantly lower (p<0.05 for both). Moreover, the ventilatory cost of cycling (expressed in LW(-1)) was significantly greater in the Tropical condition (0.40±0.03LW(-1) vs. 0.32±0.05LW(-1), in Tropical vs. Neutral; condition effect: p<0.005; condition × time: p<0.001). Rectal temperature was influenced by neither the environmental conditions nor exercise (36.7±0.1 and 37.0±0.1°C vs. 36.8±0.1 and 37.1±0.2°C, in Tropical vs. Neutral, before and after exercise) but was influenced by condition × time (p<0.05). The heart rate (HR) values usually used for training prescription were not significantly different (154±5bpm vs. 156±4bpm and 172±4bpm vs. 167±4bpm in Tropical vs. Neutral climate, for the first and second thresholds, respectively). We concluded that the usual parameters measured during maximal exercise to establish training programs are not impaired in moderate Tropical environment. Nevertheless, the thermal stress attested by the increased ventilatory cost of cycling could have prevented the cyclists from performing a true maximal test in Tropical conditions. |
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Authors:
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O Hue; S Antoine-Jonville; O Galy; S Blonc |
Publication Detail:
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Type: Journal Article Date: 2010-01-21 |
Journal Detail:
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Title: Journal of science and medicine in sport / Sports Medicine Australia Volume: 13 ISSN: 1878-1861 ISO Abbreviation: J Sci Med Sport Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-26 Completed Date: 2011-02-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812598 Medline TA: J Sci Med Sport Country: Australia |
Other Details:
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Languages: eng Pagination: 607-12 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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Laboratoire ACTES, UPRES-EA 3596, UFR-STAPS, Université des Antilles et de la Guyane, Campus de Fouillole, Pointe à Pitre, Guadeloupe, France. olivierhue@mediaserv.net |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Bicycling / physiology* Exercise / physiology Exercise Test / methods Guadeloupe Heart Rate Humans Male Oxygen Consumption Physical Exertion / physiology Pulmonary Ventilation / physiology* Tropical Climate* Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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