Stairs are the last thing that we get back...going up, not so bad, some aches, going down, foot over foot isn’t happening yet... Someone said to try going down sideways, with foot over foot...I tried, better then going down straight, I guess... what you describe , full and heavy, I have never said it that way, but upon thinking of that description, I do have that! I also feel my knee is affected by weather, today was miserable, and my knee ached for no apparent reason...in time, we get to the end...time is our friend