I usually don't wear a belt and I deadlift, front squat and stiff leg deadlift belt-less. However, I find when I do calf raises and shrugs with the trap bar, as I lower the weight back down to the floor it seems some what awkward and easier to round my back. I like doing shrugs with the trap bar, so I might just wear a belt when I do shrugs. Anyone else have this problem when using a trap bar vs. using a regular barbell?