Patients with heart disease should focus on exercise. The right amount of exercise can promote the expansion, lengthening and increase of small blood vessels in the heart, improve the oxygen supply to the heart muscle and improve lipid metabolism in the blood. Exercise also helps to improve myocardial metabolism, improve the working capacity of the heart muscle and the metabolic function of the heart. Heart patients must choose the right exercise for them when they exercise. Heart disease patients exercise as long as they have a good grasp of the way to enhance physical fitness and improve the prognosis of the disease. 1, what to pay attention to when heart patients exercise (1) if in you feel sick or fever, it is best not to exercise. People with heart disease should wait until all symptoms disappear before returning to their exercise routine, unless otherwise instructed by a doctor. (2) If your heartbeat is too slow, fast or irregular. Check your pulse after 10 minutes of rest. If there is still no relief, call your doctor or seek prompt medical attention. (3) Being too tired or short of breath while exercising is also a sign that you need to stop. Make a note to tell your doctor what is happening, or schedule an appointment to see him or her. (4) If you experience pain anywhere in your body while exercising, stop. Otherwise you may be injured. 2. Stop and rest if you: (1) feel weak; (2) are dizzy or lightheaded; (3) have unexplained swelling; (4) feel pressure or pain in your chest, neck, arms, jaw or shoulders; (5) have unexplained panic or palpitations or feel worried.