What happens during obstructive sleep apnea?

Vyvanse: An Overview of Attention Deficit Hyperactivity Disorder (ADHD) and Stimulants

A brief review of the symptoms of ADHD and stimulant options for treatment.

• Vyvanse

Abdominal crunch with fitness ball

You can do many core exercises with a fitness ball. See the abdominal crunch.

Psoriasis

Animation of the skin layers and normal function of skin cells showing the immune response and what goes wrong in the skin cells causing psoriasis.

Diabetes

Beneath your liver and behind your stomach, you have a fish-shaped gland called your pancreas. The head of the pancreas, on the right side, is connected to the small intestine, where most digestion takes place.

How to choose resistance tubing

Resistance tubing is a lightweight, portable strength training tool. See how it's used.