wuts up everyone , i hurt my lower back in football like 3 years ago and it never really healed compleatly. i did phyical therpy and all that but it only realy seams to hurt when i run sprints and do heavy squats. But in order to get my legs big like my arms i have to do negitivs, is there anyway i could get away from doin heavy ass weight on squats but still get muscle mass on my legs?