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. These harmful products of adrenaline stimulation can only be used up or neutralized by physical exercise. The body is clearly designed so that nervous tension should be balanced with physical exercise.