According to exrx.net, the trapezius muscle is a back muscle. However, when you look at it you'd think it's a shoulder muscle. http://www.exrx.net/Lists/ExList/BackWt.html#anchor125439 (in the 'back' group) Just so it's clear you guys know which muscle I'm talking about: This *is* the trapezius muscle, right? So is it back or shoulder? and also, what are the best exercises to hit it? I do shrugs using a dumb bell.