Jonathan Chen Sum

Jonathan Chen Sum is an Associate Professor of Clinical Physical Therapy at USC, where he directs the USC Physical Therapy Associates clinic. He specializes in orthopedic and sports physical therapy.

Sum's research examines injury patterns in athletes, particularly baseball players and swimmers. His work focuses on biomechanical risk factors, strength asymmetries, and evidence-based rehabilitation protocols.

Recent publications establish clinical guidelines for pain management in athletes and investigate shoulder injury mechanisms in overhead sports. His research informs prevention strategies and therapeutic interventions for athletic populations.