National Institutes of Health
Niddk: Weight Control & Healthy Living a to Z
NIDDK provides tips for becoming physically active and in-shape, the notes at this website are appropriate for students of all ages. Information is organized into several brief sections including: "Health Benefits of Physical Exercise,"...
Centers for Disease Control and Prevention
Centers for Disease Control: Physical Activity Introduction
Who needs physical activity? How can it help? Find out here with this introduction to physical activity from the CDC.