Table 1.

Baseline heart rate, core T_b, and activity of C57BL/6J mice during the dark and light phases while housed at 19°C

	Heart rate, beats/min	Core Tb, °C	Activity, AU
Dark phase	631±14*	36.9±0.2*	11.7±1.9*
Light phase	579±12	36.2±0.2	5.0±0.8

^*P < 0.05 vs. light phase. AU, arbitrary units.