The goal of this clinical trial is to test the feasibility of village doctor-delivered exercise therapy for knee osteoarthritis in rural China, and to preliminarily explore its treatment effects. The main questions it aims to answer are:
1. Is the exercise therapy delivered by village doctors feasible with satisfactory participant adherence?
2. Can this intervention produce preliminary benefits in this small pilot sample? Researchers will compare village doctor-delivered exercise therapy to usual care to see if the intervention leads to greater pain relief and functional improvement in this pilot study.
Participants will complete village-delivered exercise therapy three times a week for 12 weeks, then maintain independent exercise for another 12 weeks or receive usual care for a total of 24 weeks.