US Department of Agriculture
Choose My Plate: What Is Physical Activity?
This website provides a brief definition of "physical activity" as well as examples of "moderate physical activities" and "vigorous physical activities."
Curated OER
Kids Health: Osgood Schlatter Disease
If you're an active teenager and you frequently experience pain in joints such as your knees, you may have Osgood-Schlatter Disease. Find out more about the signs, symptoms, and treatment in this article. Links to similar sites are also...