Measurement 1 | Measurement 2 | |||||
Rebreathing | Steady-state | No preference | Rebreathing | Steady-state | No preference | |
Duration | 25 | 50 | 25 | 25 | 55 | 20 |
Breathing comfort | 20 | 80 | 0 | 20 | 75 | 5 |
Dyspnoea sensation | 15 | 70 | 15 | 10 | 85 | 5 |
Overall preference | 20 | 80 | 20 | 80 |
Data are presented as %.