CK-12 Foundation
Ck 12: Life Science: Muscles and Exercise
[Free Registration/Login may be required to access all resource tools.] Regular physical exercise is important in preventing lifestyle diseases such as cardiovascular disease, some types of cancer, type 2 diabetes, and obesity. Regular...
The Franklin Institute
The Franklin Institute: Heart Health and Care
This is a simple guide from The Franklin Institute to keeping your heart healthy through proper exercise, a varied diet, and a clean lifestyle. Here, read about how to exercise and eat to avoid heart disease.