Levator scapulae: Levator scapulae connects the neck for the shoulder blades, raises the shoulder blade, and extends/rotates the neck for upper back steadiness. The angle of the upper arm relative on your torso will motivate you to use scapular muscles like your traps and rhomboids (In case your arm is https://stephenbglps.blogmazing.com/26375775/not-known-facts-about-exercises-for-upper-back