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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
Original articles EXERCISE PHYSIOLOGY AND BIOMECHANICS
The Journal of Sports Medicine and Physical Fitness 2003 September;43(3):306-11
Influence of a hot/wet environment on exercise performance in natives to tropical climate
Voltaire B., Berthouze-Aranda S., Hue O.
«Laboratoire Adaptation au Climat Tropical» ed à l’Exercice (ACTE) University of Antilles, Guyan Pointe è Pitre Cédex, Guadeloupe
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.
Methods. 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.