Thermoregulatory Efficiency is Increased after Heat Acclimation in Tropical Natives
| Autor: | Juliana B. Guimarães, Kenya Paula Moreira Oliveira, Renata Lane de Freitas Passos, Luiz Oswaldo Carneiro Rodrigues, Valério Garrone Barauna, Angelo Ruediger Pisani Martini, João B. Ferreira-Junior, Flávio de Castro Magalhães, Emerson Silami-Garcia, Milene R. M. Lima, Michele Atalla da Fonseca |
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| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Hot Temperature Physiology Acclimatization Sweating Human Factors and Ergonomics Body Temperature SWEAT Oxygen Consumption Animal science Forearm Heat acclimation Heart Rate Physiology (medical) Heart rate medicine Humans Orthopedics and Sports Medicine Relative humidity Exercise Analysis of Variance Tropical Climate integumentary system Chemistry Public Health Environmental and Occupational Health Anatomy Trunk Sudomotor medicine.anatomical_structure Anthropology Thermodynamics Brazil |
| Zdroj: | Journal of PHYSIOLOGICAL ANTHROPOLOGY. 29:1-12 |
| ISSN: | 1880-6805 1880-6791 |
| DOI: | 10.2114/jpa2.29.1 |
| Popis: | To evaluate the effects of heat acclimation on sweat rate redistribution and thermodynamic parameters, 9 tropical native volunteers were submitted to 11 days of exercise-heat exposures (40+/-0 degrees C and 45.1+/-0.2% relative humidity). Sudomotor function was evaluated by measuring total and local (forehead, chest, arm, forearm, and thigh) sweat rates, local sweat sodium concentration, and mean skin and rectal temperatures. We also calculated heat production (H), heat storage (S), heat exchange by radiation (R) and by convection (C), evaporated sweat (E(sw)), sweating efficiency (eta(sw)), skin wettedness (w(sk)), and the ratio between the heat storage and the sum of heat production and heat gains by radiation and convection (S/(H+R+C)). The heat acclimation increased the whole-body sweat rate and reduced the mean skin temperature. There were changes in the local sweat rate patterns: on the arm, forearm, and thigh it increased significantly from day 1 to day 11 (all p |
| Databáze: | OpenAIRE |
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