The most dramatic benefit of exercise is to the heart and blood vessels. The more active people are the less likely to develop heart disease. Also, exercise requires less pumping from the heart to supply oxygen to those muscles. An exercised body also allows the heart to pump less rapidly while at rest. A body in good shape tells the heart to take it easy when the heart is resting, causing less wear and work on the heart muscle. Exercise also helps cholesterol to move out of the body rather than sticking on the artery walls and tissues. Exercise also tends to make a person more stable mentally, decreasing or eliminating major mood swings and of course exercise reduces body fat and improves the physical appearance of people, which also improves self-confidence and mental attitude.
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