Simultaneous telemetric monitoring of the circadian changes in core and BAT temperature in rats: Endogenous vasopressin may contribute to reduced BAT themogenesis and body temperature in the light phase of the circadian cycle

► BAT themogenesis heats body in the dark phase of the circadian cycle. ► Circadian rhythm of subcutaneous tissue temperature agrees with the core temperature. ► Overall circadian pattern of axillary temperature is lower than core temperature. ► Endogenous arginine vasopressin is involved in tonic thermoregulatory processes.