The trapezius muscle mass (or traps) are one of the bigger muscles of the back. The middle and lower traps originate and insert along the C7-T12 vertebrae for the lateral 3rd of your clavicle, the acromion method, plus the spine on the scapula. Schooling for muscular endurance is pretty similar https://franciscoqvvtt.blogkoo.com/hammer-strength-dumbbells-an-overview-52659158