Energy Requirements of Men in Extreme Heat

Abstract
A study was performed in extreme heat on 8 healthy young adults for three consecutive 10-day periods. In period 1 daytime temperatures in the hot sun averaged 40.5°C, in period 2 in the hot shade, 40.3°C, and in period 3 in the cool shade 26.0°C. The men carried on constant daily activity, and were allowed food and water ad libitum.