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Table 3 Regional contributions to evaporative heat loss (assuming 100% evaporation) from 14 body regions during thermal loading

From: Regional variations in transepidermal water loss, eccrine sweat gland density, sweat secretion rates and electrolyte composition in resting and exercising humans

Site Rest heat loss (W) Relative contribution (%) Exercise heat loss (W) Relative contribution (%)
Head (face) 27.81 10.2 91.30 13.8
Hand (palm) 4.33 1.6 12.88 1.9
Hand (dorsal) 9.63 23.5 27.36 4.1
Forearm 10.97 4.0 40.58 6.1
Upper arm 15.87 5.8 36.44 5.5
Axilla 2.48 0.9 6.75 1.0
Chest 22.00 8.1 50.60 7.7
Abdomen 21.71 8.0 45.68 6.9
Back 49.88 18.3 113.12 17.1
Buttocks 14.90 5.5 20.59 3.1
Thigh 42.06 15.4 102.59 15.5
Leg 37.89 13.9 88.56 13.4
Foot (sole) 3.75 1.4 6.83 1.0
Foot (dorsal) 9.75 3.6 17.43 2.6
  1. The mean, whole-body sweat rates under these conditions would approximate 0.4 L.h−1 (rest) and 1.0 L.h−1 (light-moderate intensity exercise). Calculations were performed using the regional sweat rates from Figures4 (resting states) and 5 (exercising states), an assumed heat loss of 2.43 kJ.mL−1 and the surface area of each region (Table1) based upon the morphological reference adult[116].