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How to Strengthen the Rotator Cuff and Improve Mobility
The function of your rotator cuff is not to externally rotate. When we move them from origin to insertion, they create a muscle action or a joint action of external rotation. But when we integrate that into movement, like say when we're going through a bench rest, but there's a lot of torque and rotation around that sagittal lane, then it's like the rotator cuff's job is no longer to rotate... It's to resist force and be stable. So those, that's the fundamental difference between strength and stability. Is strength is exerting force and stability is resisting force.