The immediate effect of exercise is stress on the body, but with regular exercise the body adapts; it becomes stronger, functions more efficiently, and has greater endurance. The entire body benefits from regular exercise, largely as a result of improved cardiovascular and respiratory function. Exercise enhances the transport of oxygen and nutrients into cells. At the same time, exercise enhances the transport of carbon dioxide and waste products from the tissues of the body to the bloodstream and then to the eliminative organs. As a result, regular exercise increases stamina and energy.
Regular exercise is also powerful prescription for a positive mood. Tension, depression, feelings of inadequacy, and worries diminish greatly with regular exercise. Exercise alone has been demonstrated to have a tremendous impact on improving mood and the ability to handle stressful life situations.