Fig. 3.

Left: successive 30-s, group average heart rate (HR, beats/min) values of CD (○) and pair-fed intact (▪) rats during the 2.5-h precold exposure room temperature baseline period, the 6-h cold exposure, and the postcold period. SEs are denoted with light gray vertical lines. Right: group average HR for 2-h intervals (one interval in the precold exposure room temperature baseline period, three successive intervals during cold exposure period, and one postcold return to room temperature interval). A: 4°C condition; B: 8°C condition; C: 12°C condition. Different lowercase letters above the histograms on right indicate instances of statistically significant differences (b denotes significant differences). Common letters indicate no significant difference.