When relaxed, my traps look absolutely symmetrical. When flexed, different story! My left trap is significantly more developed than my right trap. I have no idea how this has happened because I only ever do upright rows with an EZ bar, or shrugs with a straight barbell to hit my traps. My understanding was that growth would be even? Unlike in a situation where someone would use dumbells to shrug, there would be a possibility of more effort pulling up on the dumbell in the preferred hand? Bearing in mind I'm right handed, I would have thought that if there were to be an imbalance, that it would be more developed on my preferred side?
Look forward to a sensible reply, thanks in advance!