Circadian rhythm of rectal temperature in humans under different ambient temperature cycles

摘要: Abstract 1. The present study is aimed at knowing whether ambient temperature ( T a ) cycles exert any influence on circadian rhythm of rectal re in humans. 2. Three different conditions were provided: (1) was kept constant 25°C for 24 h (Constant). (2) decreased from to 22°C over 4 h 1800 2200 h, then additional 6 h and increased 0400 0800 h (FLR). (3) changed reversibly through 28°C with identical time schedule like FLR (RHF). 3. Minimum level evening decreasing rate/morning increasing rate significantly the lowest greatest FLR.