I also have been doing some oly lifting classes with a qualified trainer and he noticed that I have weaker muscles in my lower back. He said that because we were working on snatches and at position two ( which it just below my knees, with my hips pushed out) I was struggles to keep the position. Like half my body was fighting to get out of that position because it was so uncomfortable.
So my remedy is to keep working on my oly lifts two or three times a week. Any other advise?