| Priming of the sweat glands explains reflex sweating in the heat. | |
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MedLine Citation:
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PMID: 22235781 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The purpose of this study was to determine whether reflex sweating during isometric handgrip exercise (IHG) in the heat was due to a priming effect in the sweat glands or an increase in skin temperature. Ten male subjects completed four trials where they performed IHG for three minutes at 40% of their maximal voluntary contraction (MVC). The four trials included: (1) a control trial in thermoneutral conditions (23 ± 1(o)C), (2) after sitting in hyperthermic conditions (35 ± 1(o)C) for 30 min, (3) a local heating trial after having their non-exercising arm wrapped in a heat pad that maintained forearm skin temperature at ∼35(o)C for 30 min, 4) and after pilocarpine iontophoresis to a 5 cm(2) area of the forearm. The sweating rate (SR), as measured by resistance hygrometry, was not significantly different (P > 0.05) from baseline during IHG in either the control or local heating trial, but was significantly increased (P < 0.05) from baseline during the hyperthermic and pilocarpine trials. Baseline SR values of the hyperthermic and pilocarpine trials (∼0.25 mg/cm(2)/min) were significantly greater than the control and local heating trials (∼0.05 mg/cm(2)/min). These results suggest that reflex sweating in the heat during IHG is primarily due to a priming effect in the sweat glands and not because of an increase in skin temperature. |
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Authors:
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Steven Avila; Michael J Buono |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group Volume: 28 ISSN: 1464-5157 ISO Abbreviation: Int J Hyperthermia Publication Date: 2012 |
Date Detail:
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Created Date: 2012-01-12 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508395 Medline TA: Int J Hyperthermia Country: England |
Other Details:
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Languages: eng Pagination: 19-23 Citation Subset: IM |
Affiliation:
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Department of Biology. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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