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It is estimated that most ACL injuries (70 percent) are not caused by direct contact. About 30 percent of injuries result from direct contact with another player or object.

Do all anterior cruciate ligament injuries occur in contact sports like football?

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Kids Corner

Come meet the Bones Family! They’ll help you learn about how your knees work, and things you can do to keep them going strong.

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Your Knees

Your knees are amazing! Learn about what they're made of and how they work.

 Problems

Things can go wrong with your knees. Find out what can happen and how symptoms like pain and stiffness occur.

Diagnosis

Did your doctor tell you your diagnosis? Learn about what it means and what to expect.

 Treatments

Learn about alternatives to surgery and reasons why surgery may be necessary.

Surgery

Did your doctor suggest an operation? Different types of knee surgery are explained here, including planning and recovery.

 Health and Fitness

You can improve your health and protect yourself and your children from knee injury. Find out how.