Seasonal Acclimatization in Summer versus Winter to Changes in the Sweating Response during Passive Heating in Korean Young Adult Men
The Korean Journal of Physiology and Pharmacology
;
: 9-14, 2015.
Artigo
em Inglês
| WPRIM
| ID: wpr-727832
ABSTRACT
We investigated the sweating response during passive heating (partial submersion up to the umbilical line in 42+/-0.5degrees C water, 30 min) after summer and winter seasonal acclimatization (SA). Testing was performed in July during the summer, 2011 [summer-SA; temp, 25.6+/-1.8degrees C; relative humidity (RH), 82.1+/-8.2%] and in January during the winter, 2012 (winter-SA; temp, -2.7+/-2.9degrees C; RH, 65.0+/-13.1%) in Cheonan (126degrees52'N, 33.38'E), Republic of Korea. All experiments were carried out in an automated climatic chamber (temp, 25.0+/-0.5degrees C RH, 60.0+/-3.0%). Fifteen healthy men (age, 23.4+/-2.5 years; height, 175.0+/-5.9 cm; weight, 65.3+/-6.1 kg) participated in the study. Local sweat onset time was delayed during winter-SA compared to that after summer-SA (p< 0.001). Local sweat volume, whole body sweat volume, and evaporative loss volume decreased significantly after winter-SA compared to those after summer-SA (p<0.001). Changes in basal metabolic rate increased significantly after winter-SA (p< 0.001), and tympanic temperature and mean body temperature were significantly lower after summer-SA (p<0.05). In conclusion, central sudomotor acitivity becomes sensitive to summer-SA and blunt to winter-SA in Rebubic of Korea. These results suggest that the body adjusts its temperature by economically controlling the sweating rate but does not lower the thermal dissipation rate through a more effective evaporation scheme after summer-SA than that after winter-SA.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Estações do Ano
/
Suor
/
Sudorese
/
Metabolismo Basal
/
Temperatura Corporal
/
Água
/
República da Coreia
/
Temperatura Alta
/
Calefação
/
Aclimatação
Limite:
Humanos
/
Masculino
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
The Korean Journal of Physiology and Pharmacology
Ano de publicação:
2015
Tipo de documento:
Artigo
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