| Stage | What | Dose | Move on when |
| 1 · Settle and switch on | Isometric external rotation at a wall: upper arm at your side, elbow at 90°, back of the hand pressing outwards without moving | 30–45 s × 5, daily | No flare afterwards, and you can get the arm to shoulder height in daily life |
| 2 · Add load | Band external rotation + band rows (shoulder blade moves first) | 3 × 12–15 each, every other day | Two straight weeks in the green, and you no longer avoid the end of the range |
| 3 · Overhead and weighted | Wall slides → dumbbell press / lateral raise within a pain-free range, starting very light | 3 × 8–12, 2–3× per week | Everyday overhead tasks (hanging laundry, reaching a high shelf) are pain-free |
Don't stop lifting the arm just because it hurts. The shoulder is unusually sensitive to immobility — a few weeks of avoidance and range starts disappearing, sometimes towards a frozen shoulder. Move it daily within the range that stays out of the red, and let the range grow as tolerance does.
On surgery: subacromial decompression for "impingement" showed no clinically important benefit over placebo surgery in high-quality trials, and no clear advantage over exercise rehabilitation. Putting three months of serious progressive loading before an operation is the evidence-supported order.