Patients with congenital heart disease run the risk of overweight and low physical activity. Lifestyle measures are as important in these patients as in the general population. Exercise testing is an effective tool to identify patients in whom exercise may induce arrhythmias or hemodynamic instability but more often to reveal the safety of exercise, which is the conclusion in the majority of these patients. Systematic training programs have only been introduced to small groups of patients with congenital heart disease, and there are only few data on the effects obtained. The studies concluded that the exercise training programs used were safe.