Dr. Stephen Cheung

Many sports are conducted in warm to extremely hot temperatures, which can lead to both reduced performances and increased risk to athlete health. Progressive adaptation to higher heat loads via laboratory acclimation or natural exposure (acclimatization) can provide substantial potential for improved performance. Heat adaptation may include reductions in resting core temperature and heart rates, increased resting plasma volume, and habituation resulting in reduced thermal discomfort. In addition, a higher sweat rate – especially from a lower core temperature threshold for sweating onset – results in a greater evaporative heat loss capacity. These responses may each have different thresholds of stimulus duration and intensity for maximal effect. Furthermore, each may have its own timeline for onset and decay. This talk will also survey the logistical and training modifications that may be required to optimize response.

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