Physical characteristics and peak exercise responses before and after training
| Assisted (n=10) | Unassisted (n=9) | |||
|---|---|---|---|---|
| Before | After | Before | After | |
| FEV1=forced expiratory volume in 1 second; RV=residual volume; TLC=total lung capacity; Kco=carbon monoxide transfer coefficient; Pao2, Paco2=arterial oxygen and carbon dioxide tensions; Ve=minute ventilation. | ||||
| *p<0.001 compared with before training. | ||||
| †p<0.0005 compared with before training, p<0.005 compared with unassisted. | ||||
| Age (years) | 68 (9.1) | 66 (6.8) | ||
| Weight (kg) | 77.2 (25.5) | 70.3 (22.8) | ||
| Height (cm) | 177.7 (6.3) | 169 (6) | ||
| FEV1 (l) | 0.78 (0.22) | 0.76 (0.17) | 0.78 (0.18) | 0.78 (0.18) |
| FEV1 (% pred) | 26 (7) | 24 (6) | 28 (7) | 28 (9) |
| RV/TLC (%) | 59 (15) | 61 (9) | 62 (9) | 61 (8) |
| Kco (% pred) | 51 (24) | 55 (24) | ||
| Pao2 (kPa) | 8.1 (1.2) | 7.6 (2) | 8.6 (0.9) | 8.6 (0.9) |
| Paco2 (kPa) | 5.8 (0.9) | 5.8 (1.5) | 5.6 (0.7) | 5.5 (0.6) |
| Peak work rate (W) | 45.6 (10.7) | 51.7 (10.3)* | 43.5 (12) | 57 (13.2)† |
| Peak Ve (l/min) | 24.4 (5.8) | 24.7 (5.9) | 26.2 (7.7) | 27.1 (7.7) |
| Peak Ve ( %MVV) | 92.5 (19.6) | 97 (25) | ||
| Breathing reserve | 2.8 (5.5) | 1.1 (6.1) | ||
| Peak lactate (mmol/l) | 2.84 (0.54) | 3 (1.06) | 3 (1.1) | 2.9 (0.83) |
| Peak heart rate (beats/min) | 117 (10.5) | 120 (10.9) | 117 (10.9) | 120 (9.8) |
| Peak heart rate (% maximum) | 77 (8.3) | 76 (8) | ||