Patellar Tendonitis (Jumper’s Knee)

What is jumper’s knee?

Jumper’s knee, also known as patellar tendonitis, is a condition characterized by
inflammation of your patellar tendon. This connects your kneecap (patella) to your
shinbone (tibia). Jumper’s knee weakens your tendon, and, if untreated, can lead to
tears in your tendon.



What causes jumper’s knee?

Jumper’s knee is caused by overuse of your knee joint, such as frequent jumping on hard surfaces.

It’s usually a sports-related injury, linked to leg muscle contraction and the force of hitting the ground. This strains your tendon. With repeated stress, your tendon may become inflamed.

What are the symptoms of jumper’s knee?

Following are the most common symptoms of jumper’s knee. However, you may experience symptoms differently. Symptoms may include:

  • Pain and tenderness around your patellar tendon
  • Swelling
  • Pain with jumping, running, or walking
  • Pain when bending or straightening your leg
  • Tenderness behind the lower part of your kneecap

The symptoms of jumper’s knee may look like other conditions or medical problems. Always see your healthcare provider for a diagnosis.

How is jumper’s knee diagnosed?

In addition to a complete medical history and physical exam, your healthcare provider may use an X-ray to help diagnose jumper’s knee.