My right hip and knee are wrecked. Fine on a flat surface, but the minute I have to walk up stairs or any incline, I have to lock my knee and kinda lurch/waddle while waving my arms about to get on. Other dudes get turned into the Joker by society, but I have apparently opted to Become The Penguin.

dunno about hips, but I get better results than I expected from preemptively applying a knee brace at the first sign of trouble