After a few years out I'm back in the gym, but I seem to have forgotten how to do squats. When I did them before, the bar was almost pulling me backwards, so I was squatting straight up. However nowadays, when I go down my upper body gets pushed forwards, so when I go up it's putting a hell of a strain on my lower back.
What can I do to sort out my form so the weight's not all on my back? I'm having to give up squats because it's starting to hurt my back.