joint space of media compartment-radiologicaly

Category = About Your Arthritis sir, my age 41 weight 105kg I am registered patient in your site:- my knee joint space is radiologicaly apeeared much reduced in media compartment of knee due to weight pressure my questions:- 1) walking for 30 minutes continusly for cardio improving purpose harmful to my joint cushion(space)? 2) can I stay life long without joint replacement after this condition? 3}glucosamine useful? 4)when I will get bon on bon condiation (assumpe pl) 5) can a person can walk 5 minutes under bon on bon condition with bearable condition? age 41 weight 100kg male