how do PLers get their shins perpendicular to the floor? seriously, the closest I've ever gotten to it, even without any weight at all, was my shins at 80 degrees, and my chin was in line with my toes. there is no way i can lean back that far without losing my balance, so i have to lean forward. aren't you supposed to have your chest at like a 45 degree angle and shins perpendicular with floor, with wide stance, and numerous other things like head driven into bar etc? i just don't get it.