Effect of Knee Pain on Walking Biomechanics

The goal of this study is to determine if pain in one knee influences loading of the other knee during different types of walking. The main questions it aims to answer are: * How does unilateral knee pain affect contralateral knee joint loading during different types of walking? * Does movement and loading change at the hips, knees, and ankles during prolonged walking in persons with painful knee osteoarthritis? Participants will: * Fill out questionnaires/surveys * Complete clinical examinations * Walking on a treadmill under different types of walking conditions * Receive two knee injections For comparison purposes, researchers will also enroll healthy participants.