Physical Activity Following Pulmonary Rehabilitation in COPD

"Participants will be provided with a daily step diary and added to a group chat on WhatsApp. The group chat will be populated by other members of pulmonary rehabilitation programme (cluster) and the WhatsApp group leader will encourage participants to keep active. Participants will be encouraged to record the number of steps walked in a paper diary at the end of each day (i.e. prior to bedtime). This diary will simply have three columns: day of the week; number of steps; comments (optional).~The intervention will last 52 weeks."