here the following exercise (External Rotation Press) is suggested to strenghten the rotator cuff muscles:
The autor states that this exercises works all the rotator cuff muscles to a certain degree. My question is: why shouldn't it work only the external rotators (Teres Minor and Infraspinatus)? Which is the role of the other muscles in this exercise (and should we feel them)?
Another question I have is this one: how should I keep my shoulder blades? Is it fixed (for instance: retracted, neutral, depressed etc) or should it move during the exercise?