This was probably answered at one time or another.. But in the movie Pumping Iron, when Ed Corney is doing a set of squats, how much weight is on the bar.. I can't tell if those are 100lb plates or 45lb plates.. I can't imagine them being 45lb plates and Ed struggling to do 10 reps with 315!! I would also be surprised if he was doing 645lbs for 10 reps.. Anyone have the answer???