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Influence of temperature and metabolic rate on work performance with Canadian Forces NBC clothing.
Aviat Space Environ Med. 1993 Jul; 64(7):587-94.AS

Abstract

This study examined the effects of environmental temperature and metabolic rate on soldiers' work tolerance time (WTT) while wearing various levels of nuclear, biological, and chemical (NBC) defence protective clothing. There were 23 unacclimatized males (23 +/- 3 years, 76 +/- 8 kg, 1.77 +/- 0.08 m) assigned to exercise at either a light (walking 1.11 m.s-1 0% grade, alternating with lifting 10 kg) or heavy metabolic rate (walking 1.33 m.s-1 7.5% grade, alternating with lifting 20 kg) in an environmental chamber at either 18 degrees C, 50% R.H. (cool) or 30 degrees C, 50% R.H. (warm). Subjects were tested wearing three levels of clothing protection: combat clothing (L); combats and a semi-permeable NBC overgarment (M); combats and NBC overgarment, gloves, boots and respiratory (H). WTT was the time until rectal temperature (Tre) reached 39.3 degrees C, heart rate reached 95% maximum, dizziness or nausea precluded further exercise, or 5 h had elapsed. During the light and cool trials (N = 5), wearing M or H did not impair WTT (277 +/- 47 min). For the light and warm experiments (N = 6), WTT was significantly impaired with H (82.7 +/- 10.6 min). With the heavy and cool condition (N = 6), WTT was reduced with M (240.5 +/- 73.8 min) and H (56.7 +/- 17.9 min). Finally, during the heavy and warm trials (N = 6), WTT was progressively impaired for L (172.5 +/- 52.8 min), M (65.8 +/- 18.2 min), and H (34.0 +/- 9.7 min) levels of protection.(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

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

Pub Type(s)

Journal Article

Language

eng

PubMed ID

8357310

Citation

McLellan, T M., et al. "Influence of Temperature and Metabolic Rate On Work Performance With Canadian Forces NBC Clothing." Aviation, Space, and Environmental Medicine, vol. 64, no. 7, 1993, pp. 587-94.
McLellan TM, Jacobs I, Bain JB. Influence of temperature and metabolic rate on work performance with Canadian Forces NBC clothing. Aviat Space Environ Med. 1993;64(7):587-94.
McLellan, T. M., Jacobs, I., & Bain, J. B. (1993). Influence of temperature and metabolic rate on work performance with Canadian Forces NBC clothing. Aviation, Space, and Environmental Medicine, 64(7), 587-94.
McLellan TM, Jacobs I, Bain JB. Influence of Temperature and Metabolic Rate On Work Performance With Canadian Forces NBC Clothing. Aviat Space Environ Med. 1993;64(7):587-94. PubMed PMID: 8357310.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of temperature and metabolic rate on work performance with Canadian Forces NBC clothing. AU - McLellan,T M, AU - Jacobs,I, AU - Bain,J B, PY - 1993/7/1/pubmed PY - 1993/7/1/medline PY - 1993/7/1/entrez SP - 587 EP - 94 JF - Aviation, space, and environmental medicine JO - Aviat Space Environ Med VL - 64 IS - 7 N2 - This study examined the effects of environmental temperature and metabolic rate on soldiers' work tolerance time (WTT) while wearing various levels of nuclear, biological, and chemical (NBC) defence protective clothing. There were 23 unacclimatized males (23 +/- 3 years, 76 +/- 8 kg, 1.77 +/- 0.08 m) assigned to exercise at either a light (walking 1.11 m.s-1 0% grade, alternating with lifting 10 kg) or heavy metabolic rate (walking 1.33 m.s-1 7.5% grade, alternating with lifting 20 kg) in an environmental chamber at either 18 degrees C, 50% R.H. (cool) or 30 degrees C, 50% R.H. (warm). Subjects were tested wearing three levels of clothing protection: combat clothing (L); combats and a semi-permeable NBC overgarment (M); combats and NBC overgarment, gloves, boots and respiratory (H). WTT was the time until rectal temperature (Tre) reached 39.3 degrees C, heart rate reached 95% maximum, dizziness or nausea precluded further exercise, or 5 h had elapsed. During the light and cool trials (N = 5), wearing M or H did not impair WTT (277 +/- 47 min). For the light and warm experiments (N = 6), WTT was significantly impaired with H (82.7 +/- 10.6 min). With the heavy and cool condition (N = 6), WTT was reduced with M (240.5 +/- 73.8 min) and H (56.7 +/- 17.9 min). Finally, during the heavy and warm trials (N = 6), WTT was progressively impaired for L (172.5 +/- 52.8 min), M (65.8 +/- 18.2 min), and H (34.0 +/- 9.7 min) levels of protection.(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0095-6562 UR - https://www.unboundmedicine.com/medline/citation/8357310/Influence_of_temperature_and_metabolic_rate_on_work_performance_with_Canadian_Forces_NBC_clothing_ L2 - https://medlineplus.gov/veteransandmilitaryhealth.html DB - PRIME DP - Unbound Medicine ER -