Biomechanics and Clinical Outcomes in Responders and Non-Responders

Knee osteoarthritis is a degenerative joint disease that affects many older adults. However, not all patients see improvements as a result of physical therapy management; therefore, a better understanding of biomechanics and assessment of clinical outcomes between responders and non-responders is required. The included participants will be provided with informed consent and an explanation of the study procedure before enrolling in data collection. The data collection will be arranged in the same order. Practice trials will be provided before the start of data collection. The data collection will consist of standardized questionnaires, assessments, and tests commonly used in clinics.

During data collection, markerless motion capture systems will be placed around the area of interest. The markerless system does not require markers to be attached to the participant's body. The data collection will include: 1. Demographic information such as age, sex, body height, body weight, body mass index, medical history, medical diagnosis, and the Kellgren-Lawrence score. 2. Patient-reported questionnaires such as the numeric pain rating scale, knee injury and osteoarthritis outcome score, Western Ontario and McMaster Universities Osteoarthritis, and Depression, Anxiety, and Stress Scale - 21 Items. 3. Clinical assessments such as the Varus-valgus laxity test, Foot posture index, Range of motion, Muscle flexibility, and Muscle strength. 4. Functional tests such as the Timed up and go test, Five times sit-to-stand test, Four-meter walk test, and Bipedal quiet stance test.