The Effect of Heat Stress on Reaction Time to Centrally and Peripherally Presented Stimuli

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Abstract
The effect of heat stress on reaction time to centrally and to peripherally presented stimuli was determined for lean and obese subjects whose work levels on a treadmill in a heat chamber produced either a 2.5 or 5% loss of body weight in six hours. Peripheral reaction time improved with practice, but central reaction time was not affected. Obesity, eccentricity of the peripheral stimulus, and the level of dehydration did not have significant effects on reaction time. It was concluded that, for short periods of time, the effects of heat stress can be overcome for highly motivated and experienced subjects.

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