Apply contemporary rehabilitation strategies for anterior cruciate ligament patients • Illustrate the importance of proximal stability and rehabilitation in patients with patellofemoral pain syndrome • Outline the relationship between quadriceps strength, proprioception and knee osteoarthritis • Discuss the potential value of gait retraining for improving lower limb biomechanics in runners with patellofemoral pain • Contrast lower extremity kinematics & muscle activation in patients with and without patellofemoral pain syndrome