Table 2.
Cardioventilatory parameters and load obtained in incremental test
| Variable | VT1 | VT2 | VO2max |
|---|---|---|---|
| Power (W) | 195.4 (43.3) | 282.1 (37.9) | 390.3 (52.8) |
| VO2 (L·min− 1) | 2.2 (0.4) | 3.0 (0.3) | 3.9 (0.5) |
| VO2·Kg− 1 (mL·min− 1·Kg− 1) | 26.5 (11.9) | 42.1 (4.6) | 54.8 (3.1) |
| VCO2 (L·min− 1) | 2.1 (0.5) | 3.2 (0.4) | 4.9 (0.8) |
| RER | 0.9 (0.1) | 1.1 (0.0) | 1.3 (0.1) |
| VE (L·min− 1) | 56.3 (10.7) | 87.7 (14.2) | 167.7 (36.5) |
| VE·VO2− 1 | 24.7 (2.4) | 28.1 (2.0) | 41.2 (4.5) |
| VE·VCO2−1 | 26.8 (2.1) | 26.8 (1.9) | 32.3 (2.7) |
| PetO2 (mmHg) | 90.8 (4.2) | 95.3 (3.1) | 106.6 (2.8) |
| PetCO2 (mmHg) | 32.4 (2.9) | 32.4 (2.6) | 27.0 (2.4) |
| HR (beats·sec−1) | 120.2 (13.5) | 146.3 (13.1) | 169.3 (12.8) |
| Intensity (% of VO2max) | 55.8 (10.2) | 75.7 (6.6) | – |
Data are provided as mean ± standard deviation (SD) and percentage (%)
Abbreviations: HR heart rate, PETCO2 end-tidal partial pressure of carbon dioxide, PETO2 end-tidal partial pressure of oxygen, RER respiratory exchange ratio, VCO2 carbon dioxide, VE minute ventilation, VE·VCO2− 1 ventilatory equivalent for carbon dioxide, VE·VO2− 1 ventilatory equivalent for oxygen, VO2 oxygen uptake, VO2max maximum oxygen uptake, VT1 first ventilatory threshold, VT2 second ventilatory threshold