Short-term and Intermediate-term Effects of Self-applied Joint Mobilization Versus Clinician-applied Joint Mobilization in Addition to Exercise in Patients With Knee Osteoarthritis: A Randomized Clinical Trial

The goal of this clinical trial is to learn if a combination of patient self-administered joint mobilization and exercise works to treat knee osteoarthritis in adults. The main questions it aims to answer are: * Does self-administered joint mobilization improve the ability to perform regular daily activities? * Does self-administered joint mobilization improve knee motion? * Does self-administered joint mobilization improve hip strength? Researchers will compare the program of self-administered joint mobilization to a joint mobilization administered by a physical therapist. Participants will: * Attend 8-12 physical therapy clinic visits over 6 - 8 weeks * Perform home exercises * Visit the clinic 6 months later for a brief check-up