Study outcome measures
| Visit 1 | Visit 2 | Visit 3 | |
| Primary outcome measure: exercise capacity (incremental shuttle walk test) | X | X | X |
| Spirometry | X | X | |
| Frailty (Short Physical Performance Battery) | X | X | X |
| Dyspnoea (Chronic Respiratory Questionnaire-Dyspnoea domain) | X | X | X |
| Health-related quality of life (Chronic Respiratory Questionnaire) | X | X | X |
| Muscle strength (Isometric Quadriceps Maximum Voluntary Contraction) | X | X | X |
| Patient satisfaction (Global Rating of Change Questionnaire) | X | ||
| Health-economic evaluation (Modified Client Service Receipt Inventory Scale, Euro-Qol-5 Dimensions-5 Levels, NHS Digital—after visit 3 only) | X | X | X |
| Safety and trial process evaluation | X | X | X |