Table 2.

Time points of heart rate and core temperature inflection for each experimental condition

Environment	n	HR Inflection, min	Tc Inflection, min	Δt, min
MinAct
34°C	8	64 ± 17	99 ± 13	35 ± 13
36°C	11	55 ± 20	77 ± 21	22 ± 22
38°C	8	81 ± 22	92 ± 21	12 ± 13
40°C	9	78 ± 34	103 ± 35	25 ± 19
20 mmHg	7	74 ± 27	88 ± 22	14 ± 13
16 mmHg	13	60 ± 25	83 ± 19	23 ± 19
12 mmHg	13	59 ± 24	81 ± 34	22 ± 22
LightAmb
34°C	14	54 ± 23	77 ± 25	24 ± 14
36°C	9	59 ± 16	76 ± 13	17 ± 11
38°C	7	79 ± 20	90 ± 9	11 ± 16
40°C	8	66 ± 32	84 ± 22	18 ± 15
20 mmHg	10	63 ± 17	71 ± 8	8 ± 14
16 mmHg	17	58 ± 18	79 ± 13	21 ± 14
12 mmHg	19	49 ± 19	75 ± 16	26 ± 16

Values are represented as means ± SD; n represents number of subjects. The time to HR and Tc inflection was analyzed using a two-way repeated-measures ANOVA. The difference in time (Δt) between HR and T_c inflection was analyzed using a one-way ANOVA. Physiological response (i.e., HR vs. T_c): P = 0.01 (MinAct), P = 0.0002 (LightAmb); environmental condition: P = 0.14 (MinAct), P = 0.07 (LightAmb); interaction (physiological response × environmental condition): P = 0.61 (MinAct), P = 0.50 (LightAmb). HR, heart rate; LightAmb, light ambulation; MinAct, minimal activity; T_c, core temperature; Δt, difference in time between HR and core temperature inflection points.