I just recently started doing stiff leg deadlifts. For a long time, I had been doing Romanian deadlifts, and I thought it was time to switch things up a bit. My question is this: I have been doing my stiff leg deadlifts on a high block, and going as deep as I can (till the bar touches my feet). I have been going relatively heavy on these (6-8 reps).
I know I loose my lower back arch somewhat (I don't feel like I lose it all the way), but is it safe to be using weights around 315lbs with this? Also, would it be better if I wore a belt? The main reason I continue to do this exercise is because it has helped wonders with my deadlift.