| Condition | Phase | Mean (SD) |
| Placebo | Baseline | 45.7 (16.1) |
| T1 | 45.0 (15.7) | |
| T2 | 44.9 (15.9) | |
| T3 | 45.2 (15.9) | |
| Oxygen | Baseline | 45.8 (15.2) |
| T1 | 45.4 (15.9) | |
| T2 | 44.9 (15.1) | |
| T3 | 43.4 (16.6) |