Bent-over row with resistance tubing

Types of Headaches

A comparison of different types of headaches: cluster, tension, and migraine; their trigger points; and their symptoms.

Causes of endometriosis

Animation of endometriosis as it develops and causes tissue damage in a woman's reproductive tract.

Herniated nucleus pulposus (slipped disk)

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

• Back Pain

How to choose resistance tubing

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

Coronary angioplasty

Coronary angioplasty and stenting open narrowed arteries. Watch this video to find out more.