Ok so i just started doing the HCT-12 program and in there for the hip dominant exercise is the deadlift along with rack pull and romanian deadlift. I've never really done the deadlift before but i do know the right technique. Today i was doing it and it totally killed my lower back. And i also dont feel it in my legs its all in my back. i was wondering if i could do hack squats as an alternAtive?

Please Help, thank you