What is Chronic Jumper’s Knee? Chronic jumper’s knee is the common term used to describe patellar tendinosis. It generally occurs when a patellar tendonitis has persisted for more than around 6 weeks, when it is then referred to as ‘chronic’ and sometimes alternatively called chronic patellar tendinopathy. Chronic jumper’s knee is characterized by degenerative changes in the patellar tendon. This is the tendon that connects the kneecap (patella) to the shin bone (tibia) in the leg. The patellar tendon’s role is to work with the muscle in the front of the thigh, the quadriceps, allowing you to extend the knee … Continue reading Chronic Jumper’s Knee