How skin cancer develops

Alzheimers disease

This animation shows the brain and the changes that occur to it from Alzheimer's disease.

• Alzheimer's Disease

Simple squat and reach exercises with fitness ball

You can do many exercises with a fitness ball. See the simple squat and reach.

What happens during obstructive sleep apnea?

Sleep apnea -- Watch this video to see how snoring and obstructive sleep apnea occur.

• Sleep Disorders

Vyvanse: Administration and Side Effect Information

How to best take Vyvanse and a review of common and more serious side effects

• Vyvanse

Standing hip abduction exercise with resistance tubing

The standing hip abduction exercise targets the hip muscles. See how it's done.