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Influence of a new vapor protective clothing layer on physical work tolerance times at 40 degrees C.
Aviat Space Environ Med. 1992 Feb; 63(2):107-13.AS

Abstract

The purpose of the present study was to examine the influence of a new vapor protective clothing on physical work performance in a hot environment (40 degrees C and 25% relative humidity). Eleven unacclimatized males (28 +/- 6 years, 79 +/- 8 kg, 1.76 +/- 0.06 m) were assigned to exercise at either a light intermittent (L) (N = 6), or heavy continuous (H) (N = 5) metabolic rate. Group L alternated between 15 min of walking on a treadmill at 1.11 m.s-1 with a 0% grade and 15 min of rest. Group H walked continuously at 1.33 m.s-1 with a 3% grade. Subjects were tested wearing three clothing configurations: full nuclear, biological and chemical (NBC) protection (TOPP High) with the combat clothing worn under the NBC garment (TH + CC); full NBC protection without combat clothing (TH - CC); the new vapor protective clothing together with the NBC gloves, boots, and respirator (NPC). WTT was the time-period until rectal temperature (Tre) reached 39.3 degrees C, heart rate reached 95% maximum, dizziness or nausea precluded further exercise, or 3 h had elapsed. For group L, WTT was similar for TH + CC (113 +/- 12 min) and TH - CC (139 +/- 18 min). WTT was significantly increased for NPC where all subjects completed the 3 h in the climatic chamber. The rate of increase for Tre was significantly reduced for NPC (0.3 +/- 0.1 degree C.h-1) compared with both TH + CC (0.9 +/- 0.1 degree C.h-1) and TH - CC (0.8 +/- 0.2 degree C.h-1).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Defence and Civil Institute of Environmental Medicine, North York, Ont., Canada.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

1546937

Citation

McLellan, T M., et al. "Influence of a New Vapor Protective Clothing Layer On Physical Work Tolerance Times at 40 Degrees C." Aviation, Space, and Environmental Medicine, vol. 63, no. 2, 1992, pp. 107-13.
McLellan TM, Meunier P, Livingstone S. Influence of a new vapor protective clothing layer on physical work tolerance times at 40 degrees C. Aviat Space Environ Med. 1992;63(2):107-13.
McLellan, T. M., Meunier, P., & Livingstone, S. (1992). Influence of a new vapor protective clothing layer on physical work tolerance times at 40 degrees C. Aviation, Space, and Environmental Medicine, 63(2), 107-13.
McLellan TM, Meunier P, Livingstone S. Influence of a New Vapor Protective Clothing Layer On Physical Work Tolerance Times at 40 Degrees C. Aviat Space Environ Med. 1992;63(2):107-13. PubMed PMID: 1546937.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of a new vapor protective clothing layer on physical work tolerance times at 40 degrees C. AU - McLellan,T M, AU - Meunier,P, AU - Livingstone,S, PY - 1992/2/1/pubmed PY - 1992/2/1/medline PY - 1992/2/1/entrez SP - 107 EP - 13 JF - Aviation, space, and environmental medicine JO - Aviat Space Environ Med VL - 63 IS - 2 N2 - The purpose of the present study was to examine the influence of a new vapor protective clothing on physical work performance in a hot environment (40 degrees C and 25% relative humidity). Eleven unacclimatized males (28 +/- 6 years, 79 +/- 8 kg, 1.76 +/- 0.06 m) were assigned to exercise at either a light intermittent (L) (N = 6), or heavy continuous (H) (N = 5) metabolic rate. Group L alternated between 15 min of walking on a treadmill at 1.11 m.s-1 with a 0% grade and 15 min of rest. Group H walked continuously at 1.33 m.s-1 with a 3% grade. Subjects were tested wearing three clothing configurations: full nuclear, biological and chemical (NBC) protection (TOPP High) with the combat clothing worn under the NBC garment (TH + CC); full NBC protection without combat clothing (TH - CC); the new vapor protective clothing together with the NBC gloves, boots, and respirator (NPC). WTT was the time-period until rectal temperature (Tre) reached 39.3 degrees C, heart rate reached 95% maximum, dizziness or nausea precluded further exercise, or 3 h had elapsed. For group L, WTT was similar for TH + CC (113 +/- 12 min) and TH - CC (139 +/- 18 min). WTT was significantly increased for NPC where all subjects completed the 3 h in the climatic chamber. The rate of increase for Tre was significantly reduced for NPC (0.3 +/- 0.1 degree C.h-1) compared with both TH + CC (0.9 +/- 0.1 degree C.h-1) and TH - CC (0.8 +/- 0.2 degree C.h-1).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0095-6562 UR - https://www.unboundmedicine.com/medline/citation/1546937/Influence_of_a_new_vapor_protective_clothing_layer_on_physical_work_tolerance_times_at_40_degrees_C_ DB - PRIME DP - Unbound Medicine ER -