I was into powerlifting for years...never really competed, just trained that way cause I loved it. My max squat, before knee surgery and back problems was 600 pounds. I haven't done a decent leg workout in a few years but I am looking to get back into it hardcore. My biggest problem squatting was always leaning forward too much. I feel like I have a nice deep squat, when in reality my shoulders are down and my butts in the air. I see these guys squatting 1000 lbs+ and their backs are stright up and down...how do you keep yourself upright without falling back? I have much better form doing box squats but as soon as you move the box...I'm leaning forward again. Help please!!