WP2: This WP aims at comparing a PAEP added to pulmonary rehabilitation against usual care (pulmonary rehabilitation alone). Sixty-four patients with COPD will be randomized into two groups: Usual care (control, [C]) that includes only the pulmonary rehabilitation programme with the use of the DirectLife in daily routine without any feedback or incentive to increase PAL; or usual care + physical activity enhancing programme (PAEP) (Study group, [S]), which includes both pulmonary rehabilitation programme plus the PAEP using the DirectLife activity monitor with set targets of physical activity levels to stimulate and increase PADL. Both groups will perform the same pulmonary rehabilitation programme, composed by (in brief): resistance training of quadriceps femoris, biceps and triceps brachii; aerobic exercises in treadmill and cycle ergometer during 6-10 weeks.