Knee Tendonitis Tendonitis is the most common injury to the knee, but not the most well-known. This manifests as pain about the knee at the areas where the tendons attach to the bones. One of the most frequent types of tendonitis of the knee is pes anserinus tendonitis.The pes anserinus tendons lie on the inside and just below the knee joint. They are injured by strong exertional activities, such as running, commonly performed in many different sports. The MEAT protocol and Prolotherapy are the agents that most effectively relieve this pain. The wonderful thing about Prolotherapy for the athlete is that exercise is encouraged during the healing process! Exercising increases circulation, which aids in the healing from Prolotherapy. Like most tendonitis, pes anserinus tendonitis often requires three to five sessions of Prolotherapy. For the athlete who is in a big hurry to improve, the injections are given every one to two weeks. But for typical chronic tendonitis, Prolotherapy is done every four to six weeks, to allow sufficient time for tissue growth between treatments.