For the follow-up phase, patients from both groups (S and C) will be invited to attend the same assessments performed in Visit 1 (excluding spirometry, ISWT and blood samples), three months after visit 2 (Visit 3) to assess the maintenance of the effects of the programme. This additional monitoring period is optional. Therefore patients can choose whether they want to keep helping us with the study or not. For this three months period, both groups will be wearing the DirectLife (without any feedback or incentive to increase physical activity) to monitor PAL over that period. Over this three months follow up period, patients will not receive any formal physical activity counseling/intervention, and they will be excluded from the analysis if they would be under any treatment that could influence their PAL (i.e., pulmonary rehabilitation).