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Influence of a hot/wet environment on exercise performance in natives to tropical climate
B Voltaire1, S Berthouze-Aranda, O Hue
1"Laboratoire Adaptation au Climat Tropical" ed à l'Exercice (ACTE), University of Antilles, Guyan, Pointe è Pitre Cédex, Guadeloupe, Guyan. Bruno.Voltaire@univ-ag.fr
Aim:
The purpose of this study was to determine the influence of a hot/wet climate on thermoregulation and cardiac responses during a prolonged effort in natives to tropical climate.
Experimental Design:
22 healthy trained subjects volunteered to perform 3 trials of submaximal cycling of 1 hour each. Two of the trials were performed in a cool environment and the third, in tropical conditions.
Measures:
during all trials, we measured the evolution of tympanic temperature, water loss, heart rate performance.
Results:
The results showed 1). a significant increase in core temperature (p>0.001), heart rate (p<0.0001), sweat rate (p<0.0005) and water loss (p<0.0001) and 2). a significant impairent in performance, estimated at 27.7% (p<0.01), in tropical conditions as compared with a cool environment.
Conclusion:
We concluded that intensive and prolonged exercise in a hot/wet climate induces an overload regarding thermoregulatory and cardiac responses even in natives to tropical climate. The impaired physiological responses constitute a limiting factor for aerobic performance.
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