PMID: 8971493Jan 1, 1996Paper

Effects of metabolic rate and ambient vapour pressure on heat strain in protective clothing

European Journal of Applied Physiology and Occupational Physiology
T M McLellanS S Cheung

Abstract

Studies have shown that variations in ambient water vapour pressure from 1.7 to 3.7 kPa have little effect on heat tolerance time at a metabolic rate above 450 W while wearing protective clothing. With lighter exercise, where tolerance times exceed 60 min, variations in vapour pressure have a significant impact on evaporative heat loss and, therefore, heat tolerance. The present study has examined whether these findings extend to conditions with more extreme variations in vapour pressure. Twelve males performed light (L, 350 W) and heavy (H, 500 W) exercise at 40 degrees C in a dry (D, 1.1 kPa) and humid (H, 4.8 kPa) environment while wearing a semi-permeable nuclear, biological and chemical protective clothing ensemble (0.29 m2 x degree C-1.W-1 or 1.88 clo; Woodcock vapour permeability coefficient, im = 0.33). Partitional calorimetry was used to determine the rate of heat storage (S) with evaporative heat loss from the skin (Esk) calculated from changes in dressed mass or the physical properties of the clothing and the vapour pressure gradient between the skin and the environment. Skin vapour pressure was predicted from measurements of water vapour pressure above the skin surface and in the clothing with humidity sensors coupl...Continue Reading

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Citations

May 31, 2007·European Journal of Applied Physiology·Samuel N CheuvrontMichael N Sawka
Dec 18, 2007·European Journal of Applied Physiology·Peter BrödeMark Richards
Nov 28, 2009·European Journal of Applied Physiology·Andreas D Flouris, Stephen S Cheung
Jul 8, 2011·European Journal of Applied Physiology·Heather E WrightTom M McLellan
Apr 3, 2001·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·T M McLellan
Jun 19, 2004·Journal of Occupational and Environmental Hygiene·G A Selkirk, T M McLellan
Jul 9, 2004·Journal of Occupational and Environmental Hygiene·G A SelkirkJ Wong
Jun 13, 2012·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Jill M StapletonGlen P Kenny
Feb 21, 2014·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Jill M StapletonGlen P Kenny
Nov 5, 2010·Scandinavian Journal of Medicine & Science in Sports·S S CheungT M McLellan
Sep 17, 2013·Scandinavian Journal of Medicine & Science in Sports·F WangR M Rossi
Mar 4, 2014·Journal of Occupational and Environmental Hygiene·Jung-Hyun KimAitor Coca
Jun 10, 2016·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Tom M McLellan, George Havenith
Apr 26, 2006·Experimental Brain Research·Warren G DarlingAndrew J Butler
Sep 10, 2002·Medicine and Science in Sports and Exercise·Peter TikuisisGlen Selkirk
Sep 13, 2017·Frontiers in Physiology·Belén Carballo-LeyendaJose A Rodríguez-Marroyo
Oct 20, 2001·Journal of Applied Physiology·G A Selkirk, T M McLellan
Oct 20, 2007·Journal of Applied Physiology·George HavenithWolfgang Nocker
Jan 19, 2013·Journal of Applied Physiology·George HavenithXiaoxin Wang
Aug 30, 2018·Frontiers in Physiology·Belén Carballo-LeyendaJose A Rodríguez-Marroyo

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