The trapezius muscle mass (or traps) are among the list of much larger muscles with the back. The middle and reduced traps originate and insert along the C7-T12 vertebrae for the lateral third with the clavicle, the acromion method, and the backbone in the scapula. Weighted Pullup - Classic exercise https://hammer-strength-dumbbell81122.bloggazza.com/32308205/the-basic-principles-of-back-exercises-with-dumbbells