I hurt my back in wrestling a few years back. Ever since then I left the barbell squat and moved too smith machine barbell squats. My back felt much better and I could go ass to floor basically. My legs still grew but probably not as much as if I was doing free barbell squats. Is the controlled motion the smith puts you in very negative? I have been beginning to think about getting my body back into free squats again. Tried them the other day and I could barely get below paralell and couldnt not do them with out leaning foreward in a "good morning" fashion. Any help would be appreciated.