I have become a little more anal about my workouts and noticed some slight deficiencies in hamstring development so Saturday morning I set up the squat rack to hit one very specific part of the hamstring (slightly below horizontal, sumo stance). Well? I have squatted as heavy as 785 to a 20" box this year BUT let me tell you 10 sets of 135 pound squats exposing an underdeveloped muscle is more painful than any exercise I have done, I, like you creatre, could hardly walk yesterday. TOday is better but not much...