Squat with dumbbell exercise for leg muscles

How to use a dry powder disk inhaler

Watch this video to learn how to use a dry powder disk inhaler.

Core side exercises with fitness ball

You can do many core exercises with a fitness ball. See a side exercise.

Herniated nucleus pulposus (slipped disk)

This animation shows displacement of an inter vertebral disk (disk between the vertebrae).

• Back Pain

Lat pull-down with weight machine

The lat pull-down targets the side of the chest wall. See how it's done.

Photodynamic therapy of the esophagus

Photodynamic therapy video shows light treatment for Barrett's esophagus and esophageal cancer.