But consider playing tennis, or throwing a ball, weightlifting, or painting a ceiling. If this extra compression happens while sipping a cup of coffee, it’s not likely to flare anything up (unless it’s already irritated). Or if the rotator cuff isn’t doing its job to keep the arm stable in the shoulder socket…Īll of these things will lead to a greater degree of shoulder impingement. Or if the scapula isn’t moving with the arm correctly, it can position the bony prominence too low… Things like stiff and inflexible shoulders are likely to decrease the subacromial space… If shoulder function is thrown off, even just slightly, it will add extra compression to the tissues in the space. But if it’s normal, then why does it hurt?įirst of all, there’s not much room for error beyond the normal shoulder biomechanics. But we’re now cluing in that “shoulder impingement” is actually supposed to happen, and with all shoulder movement, the tissues naturally glide between the bones of the shoulder. It was observed as a nasty hook that would grab onto and rough up tissue in the shoulder, to the extent that shaving or cutting the acromion became a common procedure. And Inside this space are muscles, tendons, and sacs of lubricating fluid.įor a long time, we considered the acromion to be the primary culprit of shoulder pain. There is a small gap in the shoulder called the subacromial space. Take a quick review of your shoulder anatomy (which you can dig into this a bit more HERE), for an important structure to point out. There are a lot of words, all describing the same thing! What is Shoulder Impingement? It’s one reason why people get so mixed up about their shoulder pain. Things like rotator cuff tendonitis, biceps tendonitis, bursitis, or other medical ‘itis’ words. There is a common cause of shoulder pain-and there’s a good chance it’s the reason your shoulder hurts.Ī condition called shoulder impingement syndrome.Īnd in the medical world shoulder impingement will sometimes get defined by the pathology of what’s actually hurt.
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