By Rudy Dressendorfer, PhD, RPT, and Brian S. Alper, MD, MSPH

Dr. Dressendorfer is a physical therapist, adjunct professor of exercise physiology at University of Alberta, Edmonton, and an editor for DynaMed. Dr. Alper is medical director of clinical reference products for EBSCO Publishing, in Ipswich, Mass., and editor-in-chief of DynaMed (www.dynamicmedical.com), a database of comprehensive updated summaries covering nearly 2,000 clinical topics. Description • Patellar-tendon…