Scientists have studied the effects of exercise on health and functioning for the past forty years. Found to be the most important action you can take to improve wellness. Decrease impact of disease, increase energy levels, increase immune function and increase emotional well-being: exercise can act at a treatment for some diseases, under your control- have complete control as to how much exercise you get. Reduced risk of heart disease: regular exercise strengthens the heart and enables it to work more efficiently. Improved bone health: regular weight bearing exercise improves the strength and density of bone. Regular aerobic exercise improves the integrity of cartilage in synovial joints. More efficient metabolism : physically fit person better able to generate energy and regulate hormones. Protect against free radical damage (atoms or molecules that can cause cellular damage and impair immune functioning): produced during normal metabolic process, activates antioxidant enzymes that prevent free radical damage and maintain health of body cells.