Hi, I've started classic Starting Strength program for 2 weeks already and currently I feel my low back muscles get fatigued so yesterday I could not even finish the targeted deadlift set. I go to gym once in 2 days, could it be that those muscles just have not enough time to recover or could it be problem with the technique of squats & deadlifts? Or could it be that those muscles are the weakest in my body so the get the most load?