Nothing produces the feeling of vibrant health more than regular exercise and staying fit. Not only does a physically fit person cut his heart attack risk in half, but he also slows the aging process.
Exercise stimulates the secretion of endorphins from the pituitary gland.
These have a morphine-like action which helps produce a natural euphoria which can help control pain. Many psychiatrists prescribe exercise as treatment for mental depression. Perhaps the most beneficial use of exercise for mental health, however, is as a natural tranquilizer. Nothing works better to reduce anxiety and nervous tension than a good physical workout. Over-stimulation of the nervous system, so common in times of stress, produces catecholamines which are poison to the body, especially the heart.