| Paced breathing 15 breaths/min | | | | | | | |
| Cumulative energy (J) | 16.6 (4.5) | 19.5 (3.6) | 41.6 (17.3) | 46.3 (13.0) | 64.1 (17.3) | 81.9 (19.4) | 91.4 (29.9) |
| Average tidal volume (L) | 0.60 (0.18) | 0.56 (0.12) | 0.73 (0.35) | 0.66 (0.27) | 0.69 (0.22) | 0.67 (0.23) | 1.28 (0.34) |
| Average breaths/min | 15.4 (0.3) | 16.1 (1.5) | 15.4 (0.3) | 14.8 (0.5) | 15.6 (0.3) | 15.0 (0.4) | 15.4 (0.5) |
| Work (J/L) | 0.28 (0.08) | 0.35 (0.04) | 0.56 (0.16) | 0.76 (0.18) | 0.94 (0.21) | 1.30 (0.22) | 0.72 (0.28) |
| Self-paced breathing | | | | | | | |
| Cumulative energy (J) | 16.2 (3.6) | 12.8 (2.0) | 20.5 (3.4) | 26.0 (4.3) | 39.8 (7.3) | 63.3 (17.2) | 79.8 (23.8) |
| Average tidal volume (L) | 0.70 (0.20) | 0.58 (0.10) | 0.63 (0.20) | 0.60 (0.13) | 0.79 (0.44) | 0.70 (0.29) | 1.24 (0.53) |
| Average breaths/min | 13.6 (4.6) | 14.0 (4.8) | 13.3 (5.5) | 12.3 (4.5) | 11.0 (3.5) | 12.5 (5.2) | 16.6 (6.2) |
| Work (J/L) | 0.28 (0.06) | 0.27 (0.03) | 0.45 (0.09) | 0.61 (0.10) | 0.84 (0.15) | 1.25 (0.33) | 0.67 (0.20) |