Good question. I have never used any belts, but then again I don’t lift very heavy weights. I prefer to use my own body to do the work and using belts or any other type of external support equipment it means you either lifting too much weight or your form have been compromised and you also not using the full potential of your body to do the work. This could lead to an injury down the road and some type of muscular atrophy. Maybe an exception can be made for the professional power lifters due to the heavy weights they are working with, but not for the amateur, begginer or so-called weekend warrior :-).