| Heat stress while wearing long pants or shorts under firefighting protective clothing. | |
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MedLine Citation:
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PMID: 14660219 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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It was the purpose of this study to examine whether replacing long pants (P) with shorts (S) would reduce the heat stress of wearing firefighting protective clothing during exercise in a warm environment. Twenty-four Toronto Firefighters were allocated to one of four groups that performed heavy (H, 4.8 km x h(-1), 5% grade), moderate (M, 4.5 km x h(-1), 2.5% grade), light (L, 4.5 km x h(-1)) or very light (VL, 2.5 km x h(-1)) exercise while wearing their full protective ensemble and self-contained breathing apparatus. Participants performed a familiarization trial followed by two experimental trials at 35 degrees C and 50% relative humidity wearing either P or S under their protective overpants. Replacing P with S had no impact on the rectal temperature (Tre) or heart rate response during heavy or moderate exercise where exposure times were less than 1 h (40.8 +/- 5.8 and 53.5 +/- 9.2 min for H and M, respectively while wearing P, and 43.5 +/- 5.3 and 54.2 +/- 8.4 min, respectively while wearing S). In contrast, as exposure times were extended during lighter exercise Tre was reduced by as much as 0.4 degrees C after 80 min of exercise while wearing S. Exposure times were significantly increased from 65.8 +/- 9.6 and 83.5 +/- 11.6 min during L and VL, respectively while wearing P to 73.3 +/- 8.4 and 97.0 +/- 12.5 min, respectively while wearing S. It was concluded that replacing P with S under the firefighting protective clothing reduced the heat stress associated with wearing the protective ensemble and extended exposure times approximately 10 - 15% during light exercise. However, during heavier exercise where exposure times were less than 1 h replacing P with S was of little benefit. |
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Authors:
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T M McLellan; G A Selkirk |
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Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Ergonomics Volume: 47 ISSN: 0014-0139 ISO Abbreviation: Ergonomics Publication Date: 2004 Jan |
Date Detail:
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Created Date: 2003-12-08 Completed Date: 2004-04-13 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0373220 Medline TA: Ergonomics Country: England |
Other Details:
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Languages: eng Pagination: 75-90 Citation Subset: IM; S |
Affiliation:
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Operational Medicine Section, Defence R&D Canada--Toronto, 1133 Sheppard Avenue West, Toronto, ON, M3M 3B9, Canada. tom.Mclellan@drdc-rddc.gc.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Body Temperature Female Fires Heart Rate Heat Stress Disorders / diagnosis, etiology* Humans Male Occupational Diseases / diagnosis, etiology* Physical Exertion / physiology Protective Clothing / adverse effects* Rescue Work* Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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