SEX-RELATED DIFFERENCES IN THERMOREGULATORY RESPONSES WHILE WEARING PROTECTIVE CLOTHING

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Authors
  1. McLellan, T.M.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
This study examined the thermoregulatory responses of men (group M) and women (group F) to uncompensable heat stress. In total, 13 M (mean (SD) age 31.8 (4.7) years, mass 82.7 (12.5) kg, height 1.79 (0.06) m, surface area to mass ratio 2.46 (0.18) m square - kg 1(-) - E2, Dubois surface area 2.01 (0.16) m square, % body fatness 14.6 (3.9)%, VO2peak 49.0 (4.8) ml - kg 1(-) min 1(-) and 17 F (23.2 (4.2) years, 62.4 (7.7) kg, 1.65 (0.07) m, 2.71 (0.14) m square kg 1(-) E2, 1.68 (0.13) m square, 20.2 (4.8)%, 43.2 (6.6) ml - kg 1(-) min 1(-), respectively) performed light intermittent exercise (repeated intervals of 15 min of walking at 4.0 km h 1(-) followed by 15 min of seated rest) in the heat (40C, 30% relative humidity) while wearing nuclear, biological, and chemical protective clothing (0.29 m square C W 1(-) or 1.88 clo, Woodcock vapour permeability coefficient 0.33 im). Group F consisted of eight non-users and nine users of oral contraceptives tested during the early follicular phase of their menstrual cycle. Heat rates were high for F throughout the session reaching 166.7 (15.9) beats - min 1(-) for M. Sweat rates and evaporation rates from the clothing were lower and average skin temperature (Tsk) was higher for F. TRUNCATED
Keywords
Rectal temperature;Heat storage;Gender;Body composition;Aerobic fitness
Report Number
DCIEM-97-P-01 — Reprint
Date of publication
31 Oct 1997
Number of Pages
12
Reprinted from
Eur J Appl Physiol, vol 78, 1998, p 28-37
DSTKIM No
98-01928
CANDIS No
508778
Format(s):
Hardcopy;Document Image stored on Optical Disk

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