oa South African Journal of Sports Medicine - Heat disorders in sport
The body may fail to thermoregulate because either the rate of heat production exceeds the rate of heat loss leading to heat retention or because the rate of heat loss exceeds that of heat production leading to hypothermia. The greater interest in the exercise sciences and in clinical sports medicine has been in the disorders considered to be due to heat retention. Only more recently has it been realised that hypothermia, first recognised in Channel swimmers and mountain climbers and hikers, can also occur in marathon and ultramarathon runners competing in cold, wet and windy conditions.
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