Group 3 (IWTsuppport) IWT with motivational support after 8-14 weeks: Patients in this group will like patient´s in intervention group 2 be engaged to IWT with the IW app. The intervention period will be 52 weeks. The first 8-14 weeks will be conducted together with group 2 with a thorough introduction to the IW app and IWT three times per week for 60 minutes. In addition to the IWT from week 0 to 52, the patients in this group will receive motivational support from week 8-14 to week 52 by the health professionals at the promotion centre (see below for information regarding the IW app and the motivational support part).