The lower portion of the deadlift has always been my weak point, lifting from the floor to about my knees. I think this has something to do with my height (6' 2"). Since this lower movement is mostly legs and I do deads as a back excercise, is there a definite disadvantage to doing rack pulls from knee height instead? I max out at about 315 from the floor but have pulled over 400 on rack pulls. Obviously doing the full rep range has it's advantage, but does that advantage out weigh the fact that more weight equals more muscle? Or is this the equivilent to doing a 1/4 squat?