US National Library of Medicine
Medline Plus: Cardiac Rehabilitation
This tutorial presents information about cardiac rehabilitation. Rehabilitation is necessary to maintain heart health. The heart, angina, exercise, prevention, obesity and other risk factors are covered.
US Department of Agriculture
Choose My Plate: Why Is Physical Activity Important?
This site includes a simple list of reasons why getting exercise is important for your physical and emotional well-being. Also, learn definitions and examples of aerobic activities, resistance activities, and stretching activities.