All patients referred to a rehabilitation Institute for an out-.patient visit complete a stretching exercise program and are instructed and encouraged to perform exercises regularly once at home. At the end of the rehabilitation, the patients are randomized into two groups of 50 patients each. Patients of the first Group are allocated to a home-based telemedicine (HBT), while those of the second group receive only the recommendation to continue exercising at home (Control group). The HBT intervention consists of fortnightly scheduled phone calls to patients over the 6-month course of the study. A nurse-tutor encourages the patient to perform regularly physical activity and prescribes exercises.