Figure 2. Core temperatures increased [nearly equal] 0.2 degrees Celsius during the control period, decreased [nearly equal] 0.2 degrees Celsius during the first 30 min of forced-air heating, and then increased [nearly equal] 0.3 degrees Celsius when the warmer was set on “medium” and [nearly equal] 0.4 degrees Celsius when it was set to “high.” Elapsed time zero identifies the beginning of forced-air warming. *Value differs significantly from time zero. (dagger)A significant difference between the heater settings.