If you agree to participate in this study, you will attend up to two sessions, each lasting up to 3 hours. During the visit(s), you will walk on a treadmill for around 60 minutes in total in the Applied Biomechanics Laboratory in Mary Ellen Jones Building with or without gait biofeedback. Individuals will be asked to obtain a knee CT and a pre/post MRI. We will collect motion, ground reaction force, cartilage strain, joint loading, and muscle activation with biomechanical equipment. This study does involve small doses of radiation which we focus on keeping the lowest radiation exposure possible.