| Aerobically trained individuals have greater increases in rectal temperature than untrained ones during exercise in the heat at similar relative intensities. | |
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MedLine Citation:
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PMID: 20349316 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To determine if the increases in rectal temperature (T(REC)) during exercise in the heat at a given percent of VO2peak depend on a subject's aerobic fitness level. On three occasions, 10 endurance-trained (Tr) and 10 untrained (UTr) subjects (VO2peak: 60 +/- 6 vs. 44 +/- 3 mL kg(-1) min(-1), P < 0.05) cycled in a hot-dry environment (36 +/- 1 degrees C; 25 +/- 2% humidity, airflow 2.5 m s(-1)) at three workloads (40, 60, and 80% VO2peak). At the same percent of VO2peak, on average, Tr had 28 +/- 5% higher heat production but also higher skin blood flow (29 +/- 3%) and sweat rate (20 +/- 7%; P = 0.07) and lower skin temperature (0.5 degrees C; P < 0.05). Pre-exercise T(REC) was lower in the Tr subjects (37.4 +/- 0.2 vs. 37.6 +/- 0.2; P < 0.05) but similar to the UTr at the end of 40 and 60% VO2peak trials. Thus, exercise T(REC) increased more in the Tr group than in the UTr group (0.6 +/- 0.1 vs. 0.3 +/- 0.1 degrees C at 40% VO2peak and 1.0 +/- 0.1 vs. 0.6 +/- 0.3 degrees C at 60% VO2peak; P < 0.05). At 80% VO2peak not only the increase in T(REC) (1.7 +/- 0.1 vs. 1.3 +/- 0.3 degrees C) but also the final T(REC) was larger in Tr than in UTr subjects (39.15 +/- 0.1 vs. 38.85 +/- 0.1 degrees C; P < 0.05). During exercise in the heat at the same relative intensity, aerobically trained individuals have a larger rise in T(REC) than do the untrained ones which renders them more hyperthermic after high-intensity exercise. |
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Authors:
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Ricardo Mora-Rodriguez; Juan Del Coso; Nassim Hamouti; Emma Estevez; Juan F Ortega |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't Date: 2010-03-28 |
Journal Detail:
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Title: European journal of applied physiology Volume: 109 ISSN: 1439-6327 ISO Abbreviation: Eur. J. Appl. Physiol. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-06-25 Completed Date: 2010-10-07 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100954790 Medline TA: Eur J Appl Physiol Country: Germany |
Other Details:
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Languages: eng Pagination: 973-81 Citation Subset: IM |
Affiliation:
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Exercise Physiology Laboratory at Toledo, University of Castilla-La Mancha, Avda. Carlos III, s/n, 45071, Toledo, Spain. Ricardo.Mora@uclm.es |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Body Temperature / physiology* Exercise / physiology* Female Hot Temperature* Humans Male Oxygen Consumption / physiology Physical Endurance / physiology Physical Fitness / physiology* Rectum / physiology Regional Blood Flow / physiology Skin / blood supply Skin Temperature / physiology Sweating / physiology Water-Electrolyte Balance / physiology Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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