Patellar tendonitis is a common pathology seen in athletes involved in activities requiring forceful eccentric muscle contractions or repeated flexion and extension of the knee. This article reviews the related anatomy, biomechanics, mechanism of injury, and diagnosis of patellar tendonitis. It also presents several treatment approaches and suggestions to help identify athletes at risk.
David J. Pezzullo is a graduate student in the Dept. of Physical Therapy, and James J. Irrgang and Susan L. Whitney are with the Dept. of Physical Therapy, 101 Pennsylvania Hall, University of Pittsburgh, Pittsburgh, PA