Table 3.
Metabolic data and arterial blood gases before exercise, during exercise, and during recovery
| Rest | Exercise | 15 min Postexercise | 45 min Postexercise | 90 min Postexercise | |
|---|---|---|---|---|---|
| V̇o2, l/min stpd | 0.39 ± 0.12 | 3.48 ± 0.84 | 0.32 ± 0.07 | 0.36 ± 0.10 | 0.29 ± 0.06 |
| V̇e, l/min btps | 13.7 ± 3.4 | 97.4 ± 24.6 | 10.5 ± 2.2 | 10.1 ± 3.5 | 8.9 ± 2.6 |
| HR, beats/min | 71.5 ± 11.4 | 177.8 ± 9.4 | 77.7 ± 11.9 | 70.0 ± 2.0 | 64.7 ± 1.5 |
| A-aDo2, Torr | 6.3 ± 3.7 | 23.3 ± 5.3* | 4.2 ± 4.4 | 8.0 ± 4.4 | 10.0 ± 4.4 |
| PaO2, Torr | 112.3 ± 2.8 | 112.0 ± 5.4 | 107.5 ± 7.1 | 107.5 ± 7.9 | 110.7 ± 5.0 |
| PaO2, Torr | 106.5 ± 3.2 | 88.2 ± 8.0* | 103.2 ± 6.1 | 99.7 ± 7.2 | 99.5 ± 7.9 |
| PaCO2, Torr | 35.8 ± 2.6 | 36.4 ± 3.2 | 38.0 ± 2.8 | 39.0 ± 4.2 | 37.2 ± 2.3 |
| pH | 7.45 ± 0.01 | 7.35 ± 0.04* | 7.39 ± 0.02* | 7.43 ± 0.01 | 7.44 ± 0.03 |
| Temperature, °C | 36.1 ± 0.5 | 37.9 ± 0.4* | 37.0 ± 0.4* | 36.6 ± 0.7† | 36.5 ± 0.4 |
| Lactate, mmol/l | 1.1 ± 0.3 | 4.2 ± 2.3 | 2.0 ± 0.6 | 1.3 ± 0.6 | 0.9 ± 0.4 |
| HCO3− | 24.7 ± 1.3 | 20.3 ± 2.6 | 22.8 ± 1.6 | 24.9 ± 1.8 | 25.2 ± 1.2 |
| Base excess | 0.6 ± 1.2 | −4.5 ± 3.0 | −1.9 ± 1.6 | 0.4 ± 1.7 | 1.0 ± 1.4 |
Values are means ± SD. Exercise values were calculated from average of four time points during exercise: 10, 20, 30, and 45 min. V̇e, minute ventilation; HR, heart rate; A-aDo2, alveolar-arterial difference for O2; PaO2, alveolar partial pressure of O2, PaO2, arterial partial pressure of O2, PaCO2, arterial partial pressure of CO2. Significantly different from rest:
†
P < 0.05,
*
P < 0.01.