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