It is rarely serious. People bothered by chest pains or palpitations are sometimes given beta blockers. These drugs slow the heart rate during exercise. Active lifestyles can still be continued and aerobic exercise is recommended. The heart is a muscle, and like any muscle, it gets stronger with exercise.
Aerobic exercise strengthens the heart and makes it more efficient.
Examples are walking, jogging, swimming, cycling, or aerobic dance. A good aerobic exercise program doesn't have to be strenuous. Keeping a moderate aerobic pace for just 30 minutes a day provides the same benefits with fewer risks as strenuous activity. If the pace is too fast to talk comfortably to a companion, slow down. Seek medical advice for the exercise guidelines that are right for your heart's condition.