What is the major difference between a Squat using 2 dumbbells or using one bench press bar?
Good day
pretty much what's been said...barbell on the traps allows for more weight to be used.
Alex...are you holding the bar in the right spot? what 'bone' is it hitting? your shoulderblades? spine? if its hitting your spine, step up the back exercises to build up more muscle to cover the bone.