Since the well-known work of Benzinger the tympanic membrane temperature (Tty) has been used extensively as an indicator of core temperature and perhaps of hypothalamic temperature in thermoregulatory studies in humans.
　For the Tty, a spring type ear thermometer was devised a high sensitive thermistor with 1/100℃ for resolution and 5/100℃ accuracy.
　Tty, rectal temperature, skin temperature of femoral and for head region and cubital venous blood temperature were measured continuously during rest or exercise by treadmill or bicycle ergometer.
　Efficiency of exercise performance during short time heavy running or 20 min walking under cold conditions was better with sportswear than without.

DESCENTE SPORTS SCIENCE Vol.2/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE