Cardiopulmonary exercise testing
| Variables | HIIT | CON | ||
|
| Baseline | 12 weeks | Baseline | 12 weeks |
| VO2max (mL/kg//min) | 28.2±7.4 | 30.2±7.7* † | 27.0±6.8 | 27.0±5.1 |
| VO2max (L/min) | 3.28±0.60 | 3.48±0.61* | 3.14±0.80 | 3.26±0.73 |
| VE (L/min) | 111.5±26.5 | 119.3±22.7 * | 99.0±24.4 | 104.1±18.8 |
| RQ | 1.11±0.07 | 1.11±0.08 | 1.08±0.07 | 1.10±0.07 |
| HRmax (beats/min) | 165±16 | 164±18 | 159±19 | 161±22 |
| HRR (beats/min) | 28.3±9.6 | 29.2±15.0 | 29.1±12.3 | 32.5±8.4 |
| O2puls (mL/beats) | 19.9±3.5 | 21.4±3.9 * | 19.6±3.8 | 20.2±3.7 |
| Lactate (mmol/L) | 9.2±2.9 | 10.5±2.5 | 8.2±2.8 | 7.4±2.7 |
| VE/VCO2@AT | 27.3±2.7 | 28.4±2.5 | 25.4±2.8 | 26.7±2.9 |
| MVV | 134.3±22.7 | 128.6±24.2 | 135.7±23.0 | 133.9±22.0 |
| Breathing reserve (L/min) | 22.8±18.2 | 10.1±15.0† | 36.7±24.3 | 30.9±12.5 |
| VE/MVV | 0.83±0.13 | 0.93±0.12† | 0.74±0.15 | 0.77±0.84 |
Results from cardiopulmonary exercise testing at baseline and 12 weeks.
*Significant within-group difference from baseline (p≤0.05).
†Significant between-group difference after the intervention (p≤0.05).
HRmax, maximal heart rate; HRR, 1 min heart rate recovery; MVV, estimated maximal voluntary ventilation; O2puls, maximal oxygen pulse; RQ, respiratory quotient; VE/VCO2@AT, equivalent of ventilation and carbon dioxide expiration at anaerobic threshold, VE, ventilation; VE/MVV, breathing reserve ratio; VO2max, maximal oxygen uptake.