Changes in thermal sensation during endurance exercise.
- VernacularTitle:持久的運動時における温冷感の変動
- Author:
OSAMU KASHIMURA
- Publication Type:Journal Article
- Keywords:
Thermal sensation;
Rectal temperature;
Mean skin temperature;
Sweating rate
- From:Japanese Journal of Physical Fitness and Sports Medicine
1986;35(5):264-269
- CountryJapan
- Language:Japanese
-
Abstract:
Sensory estimates of thermal sensation of exercising unclothed five healthy male subjects have been compared with the associated thermo-physiological responses at various ambient temperatures.
The subjects were exercising at approximately 50% of their maximal oxygen intake 30 minutes in a handmade wind tunnel. Three levels of ambient air temperatures were used at about 20°C, 25°C, and 30°C. Relative humidity was always maintained at about 60%, and the air movement was kept constant at 0.1 m/sec.
Physiological measurements were thermal sensation, skin temperatures (22 points), rectal temperature, local sweating rate and total sweating rate.
The relationship between rectal temperature and mean skin temperature and the estimate of thermal sensation was described by a summation model, where the thermal sensation was linearly related to the rectal temperature and the higher levels of mean skin temperature shifted the former relation to the higher deretion.
The subjective estimate of thermal sensation (Sense) during exercise has been described as a summation of thermal signals from the core (Tr : rectal temperature) and the skin (Ts ; mean skin temperature) as follows ;
Sense=2.21 Tr+0.29 Ts-84.81 (r=0.869, p<0.001)
Further, the linear thermal sensation-rectal temperature relationship was dependent on ambient air temperature during exercise.
Increasing the maximal oxygen intake decreased the gain of the thermal sensationrectal temperature relationship at only 30°C air temperature.
It was difficult to estimate the local sweating rate by the degree of thermal sensation during exercise.
