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Department of Defense
Do Dea: Physical Fitness Activity
Exercise must be performed regularly throughout life to achieve the benefits of physical fitness, wellness, and disease prevention. In this self-guided unit, you will be introduced to the components of fitness, principles of exercise,...
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...