Lying hamstring curl with weight machine

Concussion

This animation shows the head receiving two impacts. One on the front, and one on the side from a boxing glove.

• Headache
• Pain

Upper body stretches for the workplace

Upper body stretches can help prevent stiffness. Try these stretches at work.

Seated hamstring curl with weight machine

The seated hamstring curl with weight machine exercise targets the back of the thigh. See how it's done.

Mitral valve repair surgery

Watch this video to see how doctors do mitral valve repair surgery.

Rotator cuff damage

See how your rotator cuff can become damaged.