Really good article from Tony G.
From my personal experience.. a lot of upper back injuries are related to the cuff.. The article has some drills as well as theory. Good stuff.
http://tonygentilcore.com/2017/10/rotat ... boy-bands/
"Shoulder impingement is a thing – loosely defined: it’s compression of the rotator cuff (usually the supraspinatus) by the undersurface of the acromion – and it is a nuisance."
The Rotator Cuff
The Rotator Cuff
"Man is what he reads." - Joseph Brodsky