Chronic obstructive pulmonary disease (COPD) is a common disease characterised by airflow limitation. In people with COPD, objectively measured physical activity is the strongest predictor of all-cause mortality. The effect of hospitalisation for an acute exacerbation of COPD (AECOPD) on physical activity levels is not well studied. Chapter 2 was a prospective observational study which determined the physical activity level of people hospitalised with an AECOPD (T1) and whether physical activity changed immediately after discharge (T2) and six weeks post hospital admission (T3). Physical activity levels were monitored using the SenseWear Armband and results showed a significant linear increase in steps per day from T1 to T3 (T1, mean (SD) 1385 (1972) steps/day; T2, 2040 (2680); T3, 2328 (2745), p=0.001). Pulmonary rehabilitation (PR) is an effective non-pharmacological intervention for people with stable COPD that increases exercise capacity but access to PR is poor in Australia. Alternative ways to deliver PR need to be developed and real-time videoconferencing technology offers a way to supervise exercise training in the home environment. The study in Chapter 3 determined the effect of supervised, home-based, real-time videoconferencing telerehabilitation on exercise capacity in people with stable COPD compared to usual care without exercise training. People randomised to the telerehabilitation group (TG) received exercise training three times a week for eight weeks. Results showed a significant increase in endurance shuttle walk test time in the TG compared to usual care (mean difference = 340s (95%CI: 153-526, p<0.001). Chapter 4 determined the level of satisfaction and experience in the people who completed the telerehabilitation program in Chapter 3. Results showed a high level of satisfaction with the quality of exercise sessions delivered via real-time videoconferencing technology.