DETERMINATION OF BODY HEAT STORAGE: HOW TO SELECT THE WEIGHTING OF RECTAL AND SKIN TEMPERATURES FOR CLOTHED SUBJECTS

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Authors
  1. Aoyagi, Y.
  2. McLellan, T.M.
  3. Shephard, R.J.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Two methods of estimating body heat storage were compared under differing conditons of clothing and acclimation to heat. Sixteen male subjects underwent 6 consecutie days or two 6-day periods, separated by a 1-day rest period of heat acclimation, exercising 60 min.day 1(-) at 45%-55% of maximal aerobic power in a hot, dry environment (dry bulb temperature 40C; relative humidity 30%; and wind speed 0.3 m.s 1(-)). Before and after acclimation, the subjects enetered the same environment, wearing either normal light combat clothing or clothing protective against nuclear, biological, and chemical agents; they walked on a treadmill at 1.34 m.s 1(-), 0% slope continuously (n = 11 for normal clothing) or as repeated 15-min bouts of exercise followed by 15-min sitting rest (n = 5 for normal clothing and n = 16 for protective clothing). Average exposure times were 147 min (preacclimation) and 150 min (post acclimation) for continuous exercise and 150 min (both pre- and postacclimation) for intermittent exercise while wearing normal clothing, and 103 min (preacclimation) and 116 min (postacclimation) for intermittent exercise while wearing protective clothing. Heat storage was determined calorimetrically (from heat gains and heat losses) and thermometrically (using various weightings of rectal temperature (Tre) and mean skin temperature (Tsk)). TRUNCATED
Keywords
Mean body temperature;mean skin temperature;rectal temperature;Calorimetry;thermometry;Sweating
Report Number
DCIEM-RP-94-48 — Reprint
Date of publication
17 Oct 1995
Number of Pages
12
Reprinted from
Int Arch Occup Environ Health, vol 68, 1996, p 325-336
DSTKIM No
96-02547
CANDIS No
499280
Format(s):
Document Image stored on Optical Disk;Hardcopy

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