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
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Western Ontario and McMaster Universities Arthritis Index (WOMAC)
Timeframe: Baseline (enrollment), 6-8 weeks (end of physical therapy sessions), 6 months