| Exercise and the circadian variation in body temperature measures. | |
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MedLine Citation:
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PMID: 3804546 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined the existence of circadian rhythms in rectal temperature (Tr) and selected skin temperatures at rest and during light (82 W) and medium (147 W) exercise on a cycle ergometer. Each intensity was sustained for 5 min and then followed by a graded exercise test to exhaustion. The Tr and skin temperatures were also measured on cessation of exercise and 4 min post-exercise. Fifteen males participated, measurements covering six interspersed times of day. The mean exercise time to exhaustion of 19.83 min was independent of the time of day and caused a constant rise of 0.7 degree C in Tr. Significant rhythms were observed in Tr, Tc (chest), and Ta (arm) under all conditions: findings for Tl (leg) were nonsignificant at maximal exercise and post-exercise (P greater than 0.05). The crest time for Tl had a significant lead over that of Tr and the other skin sites which were in phase concordance, mean difference in crest times being 4.73 h at rest and 4.42 h during submaximal exercise. The results demonstrated constancy with time of day in the thermal load imposed by fixed exercise. This was reinforced when mean skin and mean body temperatures were computed. The general pattern did not apply to the exercised limb, the pre-exercise rhythm disappearing after 10 min exercise. Differential heat conductances according to skin sites are implicated in the phase differences between the leg and the other temperature sites. |
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Authors:
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T Reilly; G A Brooks |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: International journal of sports medicine Volume: 7 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 1986 Dec |
Date Detail:
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Created Date: 1987-03-06 Completed Date: 1987-03-06 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: GERMANY, WEST |
Other Details:
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Languages: eng Pagination: 358-62 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Body Temperature* Circadian Rhythm* Humans Male Physical Exertion* Rectum Skin Temperature |
| Grant Support | |
ID/Acronym/Agency:
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AM 19577/AM/NIADDK NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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