Hyperthermia and maximal oxygen uptake in men and women.

Détails

ID Serval
serval:BIB_37623
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Hyperthermia and maximal oxygen uptake in men and women.
Périodique
European Journal of Applied Physiology
Auteur(s)
Arngrímsson S.A., Petitt D.S., Borrani F., Skinner K.A., Cureton K.J.
ISSN
1439-6319 (Print)
ISSN-L
1439-6319
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
92
Numéro
4-5
Pages
524-532
Langue
anglais
Résumé
To compare the effect of hyperthermia on maximal oxygen uptake (VO2max) in men and women, VO2max was measured in 11 male and 11 female runners under seven conditions involving various ambient temperatures (Ta at 50% RH) and preheating designed to manipulate the esophageal (Tes) and mean skin (Tsk) temperatures at VO2max. The conditions were: 25 degrees C, no preheating (control); 25, 35, 40, and 45 degrees C, with exercise-induced preheating by a 20-min walk at approximately 33% of control VO2max; 45 degrees C, no preheating; and 45 degrees C, with passive preheating during which Tes and Tsk were increased to the same degree as at the end of the 20-min walk at 45 degrees C. Compared to VO2max (l x min(-1)) in the control condition (4.52+/-0.46 in men, 3.01+/-0.45 in women), VO2max in men and women was reduced with exercise-induced or passive preheating and increased Ta, approximately 4% at 35 degrees C, approximately 9% at 40 degrees C and approximately 18% at 45 degrees C. Percentage reductions (7-36%) in physical performance (treadmill test time to exhaustion) were strongly related to reductions in VO2max (r=0.82-0.84). The effects of hyperthermia on VO2max and physical performance in men and women were almost identical. We conclude that men and women do not differ in their thermal responses to maximal exercise, or in the relationship of hyperthermia to reductions in VO2max and physical performance at high temperature. Data are reported as mean (SD) unless otherwise stated.
Mots-clé
Adult, Algorithms, Anaerobic Threshold/physiology, Bicycling/physiology, Body Mass Index, Body Temperature/physiology, Exercise Test, Female, Fever/metabolism, Humans, Male, Menstrual Cycle/physiology, Oxygen Consumption/physiology, Perception/physiology, Pulmonary Gas Exchange/physiology, Respiratory Mechanics/physiology, Running/physiology, Sex Characteristics, Swimming/physiology
Pubmed
Web of science
Création de la notice
19/11/2007 11:12
Dernière modification de la notice
03/03/2018 16:05
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