The trapezius muscle mass (or traps) are one of the much larger muscles with the back. The middle and decrease traps originate and insert together the C7-T12 vertebrae for the lateral third with the clavicle, the acromion process, and also the spine from the scapula. (Determined by your hip mobility https://hammer-strength-dumbbells45566.dgbloggers.com/33648570/everything-about-back-exercises-with-dumbbells