Shoulder Impingement (Subacromial Pain)

The classic explanation was mechanical: the rotator cuff tendons get pinched between the top of the arm bone and the bony roof of the shoulder (the acromion) every time you raise the arm. That picture led to a lot of surgeries to shave down the acromion and "make room."

The research has moved on. The shape of the acromion turns out to be a poor predictor of who gets pain, the tendons are more often irritated than physically pinched, and removing bone does not help more than a placebo operation. That is why many clinicians now use the term subacromial pain syndrome, which describes the pain without committing to a mechanism that does not hold up.

In practice, what I see under this label is usually some mix of rotator cuff tendinopathy, a shoulder blade that is not rotating well, and an upper back that is not extending, in a person who asked the shoulder to do more overhead work than it was ready for. All of that is trainable.

This is one of the best-studied questions in orthopedics, and the answer is consistent. Two large randomized trials published in 2018, one in the UK and one in Finland, compared subacromial decompression surgery with a placebo arthroscopy that did not remove any bone. Neither found a clinically important difference between real surgery and the placebo procedure. The Finnish trial also included an exercise-only group, whose outcomes were similar on most measures.

Earlier Finnish trials followed people for up to ten years and found that exercise alone matched surgery plus exercise at every follow-up. On the strength of that, a 2019 international guideline panel made a strong recommendation against decompression surgery for this condition.

None of this means your shoulder is not painful or that nothing can be done. It means the thing that works is a well-built, progressive exercise program, and that is what I do.

Overhead athletes and lifters: swimmers, climbers, throwers, CrossFit athletes, anyone pressing overhead several times a week. Also desk workers who added a pressing program, people over forty whose cuff tendons have less tolerance than they used to, and anyone who did a lot of unaccustomed overhead work in a short window.

The common thread is a shoulder that was asked to do more overhead than it was prepared for, with a cuff and shoulder blade that could not keep up.

We start with the story: when it started, what provokes it, what you have tried. Then a full shoulder exam: active and passive range, rotator cuff strength in several positions, how the shoulder blade moves as you raise the arm, thoracic spine extension and rotation, and specific tests to sort out whether the cuff, the biceps tendon, or the AC joint is the main driver. I also look at the neck, because neck problems refer to the shoulder more often than people expect.

You leave with a clear picture of what is driving it, immediate changes to your pressing and reaching so you can keep training, and the first exercises. Most people can press something pain-free the same day with the right variation.

First, keep you moving without irritating it. A landmine press or a neutral-grip dumbbell press usually replaces a barbell overhead press for a few weeks. Pulling volume goes up, because most overhead athletes are short on it and rowing strengthens the muscles that make room at the top of a reach. Hands-on work on the upper back and shoulder helps you tolerate the strength work while the tendons calm down.

Then the main event: progressive loading. Rotator cuff strengthening at several angles, working up to loads that actually challenge the tendons, because tendons adapt to load, not to light band work forever. Shoulder blade control drills that teach upward rotation. Thoracic extension so the arm can get overhead without the lower back or the shoulder compensating. All of it progressed over weeks with retesting.

Finally, back to overhead. Dumbbells, then the barbell, then volume. Swimmers and throwers get a graded return to their specific movement. The aim is a shoulder that can handle the overhead work you want to do, with a strength base that keeps it there.

A corticosteroid injection can reduce pain for a few weeks and is sometimes useful to make rehab tolerable, but it does not change the long-term outcome and repeated injections are not good for tendons. Imaging is rarely needed early; MRI findings like partial cuff tears and bursal thickening are common in pain-free shoulders and rarely change the plan. It becomes worth doing if there was a significant injury, if there is true weakness suggesting a full-thickness tear, or if a proper rehab course has not helped.

Surgery for impingement is, on current evidence, not better than placebo. If you have been offered a decompression, it is worth asking your surgeon what they expect it to change that the exercise program cannot.