What's a stiff back?!
Question: how do you know you have it? is it when your back is not straight when standing up or sitting down?
Answers: how do you know you have it? is it when your back is not straight when standing up or sitting down?
when you cant bend down, or stand up straight, and you put your hands on you hips to help straighten up ,its one of those things you know when you got it