I've sprained my back really bad before, as in not even able to get in my car after the workout, and having excruciating pain whenever I would transition from sit to stand or vice versa from deadlifting. Well, today as soon as I felt that feeling (I just finished warmups and this was my first rep on first set) I took my lesson from last time and quit while I was ahead and did not try to continue.
This happening again in only a few months leads me to believe my form needs to be worked on. I'm a tall guy (6'3), and I don't know if we're biomechanically disadvantaged to the short guys, but the first part of the lift, getting it above the knees, always feels awkward to me. I feel like my lower back is being used too much, and because of the length of my legs and thighs in particular my back is in a much more compromising position in this first part. It's impossible for me to keep my back arched (or straight) while doing it and my lower back comes into play to get the bar above my knees.
I usually scrape the bar on my upper shin and knee on the way up so I don't think I'm holding it too far out either.
Does anyone know if being tall is a biomechanical disadvantage meaning extra caution or lower weight should be used? And does anyone have general tips on form (besides exrx.net).