The knees are the strongest joints in the human body, allowing the legs to bend and straighten while carrying almost all of the weight of the individual when they are standing. The knees are a hinge joint, but still have substantial capacity for lateral (side-to-side) motion. 

Knee pain is common and might be acute or chronic and might be a result of injury, overuse or growth. It can stem from the tendons, ligaments, bones, cartilage or any other structure within the knee. Arthritis is one of the most common and crippling conditions to affect the knee joint.

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