Recently I was doing deads for 2 reps at 315 which I know isn't a lot, but for for me it is considering the time its taken me to get to that point. Well, to make a long story short, I did 315 easily last week and tried again this week and felt a pop in my lower spine. Couldn't move, lots of pain. I never wore a belt before cause I felt I didn't need too. I was wondering when and If one should wear a belt with regards to deadlifts and squats and how often?