Appropriate activity includes the right amount of exercise and the right type of exercise. Clinicians have found that some heart patients are less likely to have a heart attack when they do whole-body exercise, but are more likely to have a heart attack when they do localized muscle activity, even though the amount of exercise is no greater than whole-body activity. Further research has shown that this is due to the way the body supplies blood and the resulting changes in blood pressure. There is a principle of “more work, more pay” in the blood supply of the body. The greater the activity of a muscle, the greater the vasodilation of that muscle and the more blood it receives. The amount of blood flowing in the body is certain, and in order to supply the increased blood demand of active muscles, the blood vessels of inactive muscles contract. In the case of whole-body muscle activity, blood pressure increases slightly after the start of exercise and then returns to its original level due to vasodilation of the whole-body muscles. This activity does not increase the burden on the heart, but also achieves the purpose of exercise. In the case of localized muscle activity (such as upper or lower limb exercise), the muscle vasodilation in the active part and the vasoconstriction in most inactive muscles cause a significant increase in blood pressure, which increases the burden on the heart. In cases where the heart and brain function is already weak, the patient is highly susceptible to myocardial infarction. Research by American physiologist Astron showed that blood pressure was higher during upper extremity activity than during lower extremity activity, and higher during lower extremity activity than during whole body activity, for the same output. Therefore, he recommends that the elderly and cardiac patients must have their physician’s approval for local muscle activity. It can be seen that the elderly and heart patients should not perform local muscle activities such as exercise with dumbbells, tensioners, and single and double bars when they are active indoors. Some relaxing and enjoyable whole-body activities that do not increase the burden on the heart can be performed, such as ballroom dancing, radio exercises, and taijiquan.