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. 2008 Jul 17;586(Pt 17):4327–4338. doi: 10.1113/jphysiol.2008.157073

Table 1.

Ventilatory and haemodynamic variables at rest and during exercise

Rest (R) Exercise (E) R versus E
PET,CO2 (mmHg) 38.2 ± 1.2 44.1 ± 1.7 P = 0.004
Pa,CO2 (mmHg) 43.2 ± 1.7 44.6 ± 01.2 P = 0.294
Pa,O2 (mmHg) 225 ± 17 244 ± 2 P = 0.578
pH 7.40 ± 0.01 7.39 ± 0.01 P = 0.668
Inline graphic (l min−1) 11.6 ± 0.5 26.0 ± 1.2 P < 0.001
VT (ml) 1059 ± 330 1431 ± 163 P = 0.156
Inline graphic (ml min−1) 330 ± 63 942 ± 40 P < 0.001
Inline graphic (ml min−1) 338 ± 24 849 ± 32 P < 0.001
MAP (mmHg) 92 ± 1 97 ± 2 P = 0.169
HR (beats min−1) 69 ± 5 98 ± 8 P < 0.001
MCA Vmean (cm s−1) 51.4 ± 4.5 53.3 ± 4.2 P = 0.085

Values are means ±s.e.m. PET,CO2, end-tidal carbon dioxide (CO2) tension; Pa,CO2, partial pressure of arterial CO2; Pa,O2, partial pressure of arterial O2; Inline graphic, minute ventilation; VT, tidal volume; Inline graphic, oxygen uptake; Inline graphic, CO2 uptake; MAP, mean arterial pressure; HR, heart rate; MCA Vmean, middle cerebral artery mean blood velocity.