I had right knee replaced in 2009 and left done in January 2023. Right knee became painful a couple of years ago and has not gotten better, so it hurts to walk up and down stairs with it. Left knee is still somewhat stiff, so going up and down is always a challenge. Both knees hurt a bit when rising from a chair. I do a lot of outdoor activities, like walking, gardening, landscaping, so am kind of active. I have to go up and down steep stairs every am and pm to bedroom; I just put up with it, going up one step at a time, using rail to pull myself up or hang on to go down. Even stepping up and down from a street curb is a bit painful still. I am hoping that over time, things will improve. It is a slow process.