Table 2.
Cardiopulmonary exercise and derived variables of population A (maximal exercise)
| Healthy subjects | Patients with CV risk factors | Cardiac subjects | |
|---|---|---|---|
| Peak work rate, W | 170 ± 65* | 121 ± 36 | 71 ± 28 |
| Ramp duration, s | 550 ± 139 | 572 ± 132 | 494 ± 148 |
| Peak Borg scale | 16.7 ± 1.3* | 16.8 ± 1.4 | 15.4 ± 1.6 |
| Peak HR, beats/min | 164 ± 23* | 134 ± 27 | 117 ± 19 |
| %Predicted peak HR | 90 ± 9.5* | 83 ± 13 | 77 ± 12 |
| VO2peak, mL/min | 2031 ± 728* | 1581 ± 413 | 973 ± 323 |
| VO2peak, mL/kg/min | 32.2 ± 9.2* | 22.0 ± 6.0 | 16.0 ± 4.0 |
| Peak R | 1.18 ± 0.09 | 1.15 ± 0.09 | 1.14 ± 0.10 |
| vVAT, mL/min | 1042 ± 310* | 916 ± 237 | 629 ± 169 |
| vVAT, mL/min/kg | 16.7 ± 4.1* | 12.6 ± 3.2 | 10.4 ± 1.9 |
| expVAT (VCO2), mL/min | 1085 ± 353* | 874 ± 199 | 589 ± 168 |
| expVAT (VCO2), mL/min/kg | 17.2 ± 4.2* | 12.1 ± 2.7 | 9.7 ± 2.0 |
| Exponential coefficient | 1.0012 ± 0.0003* | 1.0013 ± 0.0002 | 1.0020 ± 0.0006 |
| expVAT (VE), mL/min | 1053 ± 295* | 884 ± 203 | 634 ± 176 |
| expVAT (VE), mL/min/kg | 16.7 ± 3.4* | 12.2 ± 2.8 | 10.4 ± 2.3 |
| Exponential coefficient | 1.0010 ± 0.0003* | 1.0011 ± 0.0002 | 1.0017 ± 0.0006 |
| OUES (VCO2), mL/min | 2036 ± 599* | 1725 ± 345 | 1197 ± 326 |
| OUES (VE), mL/min | 2386 ± 679* | 1988 ± 451 | 1413 ± 404 |
*p-Value was significant at least at < 0.05 by 1-way analysis of variance.
HR heart rate, VO2 oxygen uptake, R respiratory exchange rate, vVAT visual ventilatory anaerobic threshold: expVAT (VCO2), exponential VAT based on VO2 vs. VCO2; expVAT (VE), exponential VAT based on VO2 vs. VE; OUES (VCO2), oxygen uptake efficiency slope based on logVCO2 vs. VO2; OUES (VE), oxygen uptake efficiency slope based on logVE vs. VO2