Planks are a very good isometric strengthening exercise for the scapular muscles, especially after a rotator cuff injury or other shoulder injuries. It can also help compliment the upper extremity and the lower extremity core. Start off in four point position by straightening out the legs one at a time with your core engaged by making yourself skinnier at the waistline. You’re going to hold that for ten seconds a
and you’re going to do three sets of ten to start.