Knee is a vital organ that allows us to stand, walk up and down stairs, squatting, or go out on their own. When used for osteoarthritis or not. Life will change. I will not walk Not active Stairs difficult Do not sit on the floor Use cesspool difficulty Then he seemed to enjoy Or sit on a low I can not stand Then the final step may be to not walk. Thus, we take care of it Before it left us better. It will have to work longer.