Patellar tendinitis/ tendinopathy is an injury to the tendon connecting your kneecap (patella) to your tibia (shinbone). The patellar tendon is the cable that is attached to the quadriceps (anterior thigh muscles) that enables you to extend your knee so that you can walk, run, kick, and jump.
Patellar tendinitis, also known as “jumper’s knee”, is most common in athletes whose sports involve frequent jumping — such as basketball and volleyball. However, even people who don’t participate in jumping sports can get patellar tendinitis.
Pain is the first symptom of patellar tendinitis. Initially, you may only feel pain in your knee as you begin physical activity or just after an intense workout. Over time, the pain worsens and starts to interfere with playing your sport. Eventually, the pain interferes with daily movements such as climbing stairs or rising from a chair. If the patellar tendinitis goes untreated for an extended period of time, it will be labeled as the chronic condition of patellar tendonopathy.