 Participants were randomly assigned to one of two groups: 1 Self-management and Exercise 2 Educational. Both groups received glucosamine and chondroitin sulfate supplement during the intervention. Blinding of participants was not possible due to the nature of the intervention; however, assessors were blinded to group allocation. The PLE2NO in Portuguese Education and Exercise Free Program for osteoarthritis is a community-based program with two components: self-management and exercise. Each session lasted 90 minutes, and the first 30 minutes corresponded to a self-management part and the remaining 60 minutes to the exercise program. The program was offered in a group format, encouraging peer interactions and socialization that can help counteract feelings of depression and isolation. The self-management program is based on the program developed at Stanford University, the Chronic Disease Self-Management Program which the purpose is developing self-efficacy based on social cognitive theory. The exercise program comprised both health related strength, flexibility and skill-related agility, balance, speed and power physical fitness components, and was based on Fit an Strong Program, on Exercise for People with Arthritis FEPA and also on the program Takin Control with Exercise Arthritis Foundation. The program will last for 3 months and 6 months of follow-up. 