Abstract
The effects of morphological factors (body surface area ( A D), body mass and surface to mass ratio ( A D/ M)) on exercise heat stress responses in a hot wet (HW) (35°C 80% rh) and hot dry (HD) climate (45°C, 20% rh) of equal WBGT (≃31.6°C) were studied in 30 and 25 subjects respectively. In both climates there were positive correlations of T re with A D/ M, negative with A D and mass, giving the bigger subjects an “advantage” that remained ( A D/ M) when data were corrected for differences in V ̇ O 2 max , which accounted for a substantial part of the variance in T re. The observed A D/ M effect contradicts earlier studies but is consistent with model calculations.
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