Jumper's knee is an injury of the patellar tendon. The patellar tendon is the cord-like tissue that joins the patella (kneecap) to the tibia (shinbone).

Jumper's knee is an overuse injury (when repeated movements injure a part of the body). It happens when frequent jumping, running, and changing direction damages the patellar tendon. It's also called patellar tendonitis.

Learn more about Jumper's Knee through our educational images: