The author of this article notes that although regular exercise is good for the health, it increases the risk of ventricular arrhythmias and sudden death in people with pre-existing cardiac diseases. The following topics are discussed by the author:

• Sudden death in athletes with previous cardiac conditions
• Endurance training and athlete's heart (including therapeutic measures)
• Atrial arrhythmias and endurance exercise
• Bradycardia and AV conduction disturbances in endurance sport practitioners
• Ventricular arrhythmias and sport practice
• Sport activities in patients with a defibrillator
• Conclusions