Exercise
BehavioralHome-based exercise training program that requires only minimal equipment, and is individually adaptable to the participant's exercise level (6 times per week; 15-20 min; 38 exercise cards and one interactive training agenda booklet). After randomization, a health care professional (HOMEX coach) will visit the intervention group participants at their home to set up the training location, to instruct the exercises and to establish individualized goals. Follow-up visits are planned after 3 and 8-9 weeks. Regular telephone calls will be conducted by the same HOMEX coach to motivate the patients, to discuss training progress and concrete benefits and barriers, and to adapt goals and the training program. Additional intervention elements are that a relative or friend is involved as a "sparring" partner to support the participant. The general practitioner is informed about the participation of his/her patient in the intervention.