. 2017 Jan 20;5(2):e13108. doi: 10.14814/phy2.13108

Table 2.

Blood gasses and metabolite responses to incremental exercise with different grades of hyperthermia

% of W_max	pH		Hb (g·L⁻¹)		SO₂ (%)		PO₂ (mmHg)		PCO₂ (mmHg)
% of W_max	Arterial	Venous	Arterial	Venous	Arterial	Venous	Arterial	Venous	Arterial	Venous
HYP_mod
Rest	7.46 ± 0.01b ^, b	7.44 ± 0.01b ^, b	148 ± 3b ^, b	151 ± 3b ^, b	97.5 ± 0.3	85.1 ± 1.3b ^, b	94.5 ± 2.9	51.8 ± 1.3b ^, b	38.2 ± 1.3	42.1 ± 1.8
20	7.47 ± 0.01b ^, [Link]	7.39 ± 0.01a ^, b ^, [Link]	154 ± 3a ^, b ^, [Link]	157 ± 3a ^, b ^, [Link]	98.0 ± 0.2	36.3 ± 1.2a	100.3 ± 2.8	24.1 ± 0.6a ^, b ^, [Link]	36.2 ± 1.8a	53.7 ± 2.8a
40	7.45 ± 0.01a ^, b ^, [Link]	7.35 ± 0.01a	154 ± 3a ^, b ^, [Link]	157 ± 3a ^, b ^, [Link]	97.8 ± 0.2	25.9 ± 2.0a	99.4 ± 3.1	21.1 ± 0.8a	37.0 ± 1.5[Link]	60.3 ± 2.7a
60	7.42 ± 0.01a ^, b	7.31 ± 0.01a	155 ± 3a ^, b ^, [Link]	158 ± 3a ^, b ^, [Link]	97.5 ± 0.2a	21.0 ± 2.3a	99.3 ± 2.2	20.2 ± 1.1a	38.1 ± 1.2	65.9 ± 2.1a
80	7.40 ± 0.01a ^, b ^, [Link]	7.26 ± 0.01a ^, [Link]	156 ± 3a	159 ± 4a ^, b ^, [Link]	97.2 ± 0.2a	16.8 ± 1.9a ^, [Link]	98.2 ± 2.9	18.9 ± 1.1a	36.2 ± 0.9	72.1 ± 1.9a
100	7.36 ± 0.01a ^, b ^, [Link]	7.19 ± 0.01a ^, [Link]	157 ± 3a	161 ± 3a ^, b ^, [Link]	96.7 ± 0.2a	11.6 ± 1.3a	100.3 ± 2.4	17.8 ± 1.1a	33.7 ± 1.0a	78.1 ± 2.1a
HYP_mild
Rest	7.44 ± 0.01	7.41 ± 0.01	141 ± 2b	143 ± 3	97.9 ± 0.1	71.5 ± 2.1	95.7 ± 2.2	38.2 ± 1.2	38.2 ± 1.0	44.3 ± 1.2
20	7.44 ± 0.01	7.38 ± 0.01a	147 ± 3a ^, b	149 ± 3a ^, b	97.8 ± 0.1	32.4 ± 1.6a	95.1 ± 2.0	21.8 ± 0.5a	37.7 ± 1.1	52.5 ± 1.6a
40	7.42 ± 0.01a	7.33 ± 0.01a	148 ± 3a ^, b	150 ± 3a ^, b	97.6 ± 0.2	23.4 ± 1.2a	95.9 ± 1.8	20.0 ± 0.5a	39.3 ± 0.9	61.4 ± 1.5a
60	7.41 ± 0.00a	7.29 ± 0.00a	150 ± 3a ^, b	153 ± 3a ^, b	97.3 ± 0.1a	18.0 ± 1.2a	96.0 ± 1.7	18.6 ± 0.6a	38.6 ± 1.0	67.6 ± 1.2a
80	7.38 ± 0.01a	7.23 ± 0.01a ^, b	153 ± 3a	155 ± 3a	97.1 ± 0.2a	13.9 ± 1.4a ^, b	97.3 ± 2.0	17.8 ± 1.0a	36.6 ± 1.2b	74.0 ± 1.5a
100	7.32 ± 0.01a ^, b	7.15 ± 0.01a ^, b	156 ± 3a ^, b	152 ± 3a ^,	96.2 ± 0.3a	11.1 ± 1.2a	99.2 ± 2.5	17.9 ± 1.2a	33.3 ± 1.1a	79.0 ± 2.7a
Control
Rest	7.44 ± 0.01	7.41 ± 0.01	138 ± 3	140 ± 3	97.9 ± 0.1	66.6 ± 3.3	95.8 ± 1.6	36.4 ± 1.9	37.4 ± 1.0	43.9 ± 1.6
20	7.44 ± 0.01	7.39 ± 0.01a	145 ± 3a	146 ± 3a	97.7 ± 0.2	32.3 ± 1.2a	93.5 ± 2.1	21.7 ± 0.3a	37.2 ± 1.0	50.2 ± 1.5a
40	7.42 ± 0.00a	7.34 ± 0.01a	146 ± 3a	147 ± 3a	97.7 ± 0.2	23.0 ± 1.6a	97.5 ± 2.4	19.6 ± 0.6a	38.7 ± 1.0	59.5 ± 1.5a
60	7.40 ± 0.00a	7.29 ± 0.00a	148 ± 3a	151 ± 3a	97.2 ± 0.2a	19.7 ± 1.6a	95.2 ± 1.8	19.2 ± 0.8a	39.4 ± 1.0a	66.0 ± 1.4a
80	7.38 ± 0.01a	7.24 ± 0.01a	150 ± 3a	151 ± 3a	96.8 ± 0.2a	15.5 ± 1.5a	95.6 ± 2.5	18.6 ± 1.1a	38.3 ± 1.4	71.4 ± 1.6a
100	7.33 ± 0.01a	7.17 ± 0.01a	153 ± 3a	153 ± 3a	96.3 ± 0.3a	12.0 ± 1.2a	98.8 ± 2.6	17.9 ± 1.1a	34.3 ± 1.3a	76.7 ± 2.2a

Values are mean ± SEM for 9 participants. pH, Hemoglobin (Hb), oxygen saturation (SO₂%), partial pressures of oxygen (PO₂) and carbon dioxide (PCO₂) for arterial and femoral venous blood.

Presented symbols denote differences between conditions, when compared at a relative % of maximal work rate in hyperthermia or normothermia (100% = 321 W in HYP_mod vs. 371 W in HYP_mild and control, respectively).

Different versus rest.

Different versus control (all P < 0.05).

Different versus mild hyperthermia.