I've been struggling with my knees for ages now. Haven't been able to crouch down for years. Second yoga class two nights ago and for the position we were doing I had to crouch. It really hurt but I made myself. Couldn't do the position as it was very hard but two days later I can crouch down and hold it without crying! I can't believe it. I nearly left my first class early as well but I'm sticking with this. Sorry had to share as I've been really worried about my legs and knees especially