Effects of different therapeutic interventions on endurance time, lung hyperinflation and dyspnoea in chronic obstructive pulmonary disease
| Type of intervention [Ref.] | ||||
| Tiotropium 252 | Oxygen 263 | Heliox 254 | Rehabilitation 266 | |
| Work-rate % max | 75 | 75 | 80 | 75 |
| FEV1 % pred | 42 | 31 | 38 | 36 |
| Δ Endurance time % | +21 | +145 | +115 | +175 |
| Δ IC at isotime % | +12 | +24 | +12 | +13 |
| Δ dyspnoea at isotime % | -14 | -40 | -25 | |
FEV1: forced expiratory volume in one second; % pred: % of predicted value; IC: inspiratory capacity; Δ: changes at isotime expressed as a percentage of control condition.