LIMB BLOOD FLOW WHILE WEARING AIRCREW CHEMICAL DEFENSE ENSEMBLES IN THE HEAT WITH AND WITHOUT AUXILIARY COOLING

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Authors
  1. Bain, B.
  2. Vallerand, A.L.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The effect of auxiliary air cooling on endurance time and limb blood flow in the heat (37C, 50% r.h., target time = 150 min) while wearing aircrew chemical defense (CD) ensembles was examined. Eight males were dressed in aircrew CD ensembles with or without an air-cooled vest. After an initial 10 min treadmill walk and 20 min of seated rest, the subjects alternately rested and exercised on a cycle ergometer (10 min rest, 10 min exercise) resulting in an overall metabolic rate of 240 W. Arm and leg blood flow (ABF, LBF), determined by venous occulsion plethysmography, were significantly lower with air cooling (AC) than with no cooling (NC) during the same time period (p < 0.05). Endurance time was much greater with AC than with NC (150 min AC vs. 92 + or - 0.08 min NC, p < 0.01). Arm and calf skin temperatures, rectal temperature and heart rate were all significantly lower with AC than with NC (p < 0.05) after the onset of the cycle exericse. TRUNCATED
Report Number
DCIEM-90-43 — Reprint
Date of publication
15 Oct 1991
Number of Pages
8
Reprinted from
Aviat Space Environ Med, vol 63, 1992, p 267-272
DSTKIM No
92-01665
CANDIS No
104554
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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