Influence of a hot/wet environment on exercise performance in natives to tropical climate.
OBJECTIVE
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.


METHODS



METHODS
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.


METHODS
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.


CONCLUSIONS
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.
Voltaire
B
B
"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
Berthouze-Aranda
S
S
Hue
O
O
D000328:Adult; D001833:Body Temperature Regulation / Q000502:physiology; D002320:Cardiovascular Physiological Phenomena; D004777:Environment; D015444:Exercise / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006358:Hot Temperature; D006801:Humans; D006813:Humidity; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D012016:Reference Values; D013546:Sweating / Q000502:physiology; D013997:Time Factors; D014329:Tropical Climate; D014432:Tympanic Membrane / Q000502:physiology