THE EFFECT OF PHYSICAL TRAINING ON THERMOREGULATORY RESPONSES OF PREADOLESCENT BOYS TO HEAT AND COLD
- Author:
KENJI MATSUSHITA
;
TSUTOMU ARAKI
- Publication Type:Journal Article
- From:Japanese Journal of Physical Fitness and Sports Medicine
1980;29(2):69-74
- CountryJapan
- Language:English
-
Abstract:
Physically trained and untrained preadolescent boys were examined experimentally for the effect of physical training on thermoregulatory responses to heat and cold. In summer they were asked to wear swimming pants and dip their legs up to the knees into water at 42.3°C for 60 minutes under given environmental conditions (30°C DB and 70% RH) . Then they were exposed to a given cold environment (18°C DB and 60% RH) in a resting posture for 60 minutes. Rectal and mean skin temperatures, total body sweat rate, puls rate, metabolism, etc, were measured. The pulse rate at rest was lower in those trained physically than in those untrained. The rectal temperature increased and decreased less remarkably during exposure to heat and cold, and the total body sweat rate to the increment of rectal temperature tended to be higher in those trained than in those untrained. The other variables measured during both cases of exposure failed to respond to physical training. These results suggested a possibility that physical training might be a means of improving the thermoregulation in preadolescents, although its effect might be inconsiderable.
