Source+1

Jonk, Ron. "Exercise - Exercise's Effects on the Heart." University of Maryland Medical Center. 2011. Web. 29 Mar. 2011.

1. Inactivity is one of the major risk factors for heart disease. 2. Exercise helps improve heart health, and can even reverse some heart disease risk factors. 3. The heart becomes stronger as a result of exercise, so it can pump more blood through the body with every beat and continue working at maximum level 4. Any amount of exercise is beneficial 5. The heart is a large muscular organ that pumps blood throughout the body 6. The American Heart Association recommends that individuals perform moderately-intense exercise for at least 30 minutes on most days of the week 7. People who maintain an active lifestyle have a 45% lower risk of developing heart disease than do sedentary people. 8. Some studies suggest that for the greatest heart protection, it is not the duration of a single exercise session that counts but the total weekly amount of energy expended 9. Regular exercise helps keep arteries elastic 10. Sedentary people have a 35% greater risk of developing high blood pressure than physically active people do 11. Anyone with existing high blood pressure should discuss an exercise program with their doctor. 12. Exercise performed under medical supervision is proving to be helpful for select patients with stable heart failure. 13. Physical activity lowers stroke risk 14. Intense workouts may be particularly hazardous for people with risk factors for heart disease, especially older people. 15. At least 40% of young men who die suddenly during a workout have previously experienced, and ignored, warning signs of heart disease