Shoulder Impingement: Exercises and Treatment Options

What is shoulder impingement syndrome?

The subacromial space is the narrow gap between the top of the rotator cuff tendons and the underside of the acromion (a bony shelf at the top of the shoulder). When this space becomes compressed during arm elevation, the rotator cuff tendons and the overlying bursa (a fluid-filled cushion) are pinched — this is impingement.

Impingement is not a single diagnosis but describes a mechanism that may involve:

• Subacromial bursitis — inflammation of the bursa
• Rotator cuff tendinopathy — degenerative changes in the tendon, particularly the supraspinatus
• Rotator cuff partial tears — may develop from chronic impingement

The term "impingement" has evolved in sports medicine literature toward functional descriptions of load and tissue tolerance, but it remains widely used clinically to describe this cluster of symptoms.

What causes shoulder impingement?

The subacromial space can narrow from structural factors (a hooked acromion shape, bone spurs) or dynamic factors (poor rotator cuff and scapular muscle function that allows the humeral head to drift upward during arm elevation).

Functional causes — which are the most treatable — include:

• Rotator cuff weakness — particularly the external rotators (infraspinatus, teres minor) that keep the ball centered in the socket during overhead movement
• Scapular dyskinesis — poor upward rotation of the shoulder blade on the ribcage during arm elevation, which reduces the subacromial outlet space
• Poor thoracic mobility — a rounded upper back reduces the shoulder's range of overhead motion
• Occupational or athletic posture — prolonged forward-shoulder posture (desk work, overhead labor, swimming, throwing) loads these tissues repeatedly

What are the symptoms of shoulder impingement?

Common features:

• Pain with arm elevation — particularly between 60–120 degrees, a range called the "painful arc"
• Pain at night, especially lying on the affected side
• Weakness with reaching overhead or behind the back
• Anterolateral shoulder pain — front and outer side of the shoulder
• Symptoms that build gradually rather than from a single traumatic event

A clinician will use physical examination tests — Neer sign, Hawkins-Kennedy test, empty can test — to confirm the clinical diagnosis and assess whether rotator cuff muscle function is also impaired.

What exercises help shoulder impingement?

A physical therapist designs the specific program, but the core categories of exercise for shoulder impingement are well established in the rehabilitation literature 2Ref 2Nazari G, MacDermid JC, Bryant D, Athwal GS (2019).The effectiveness of surgical vs conservative interventions on pain and function in patients with shoulder impingement syndrome. A systematic review and meta-analysis.Surgery plus physiotherapy compared to physiotherapy alone produces effects too small to be clinically important across 3 months to 10 years follow-up — confirming PT as the appropriate first-line treatment for subacromial impingement3Ref 3Clijsen R, Fuchs J, Taeymans J (2014).Effectiveness of exercise therapy in treatment of patients with patellofemoral pain syndrome: systematic review and meta-analysis.Structured exercise therapy including rotator cuff and hip strengthening produces meaningful reductions in pain and functional limitations in musculoskeletal overuse conditions — methodology applicable to the PFPS/impingement exercise evidence base4Ref 4American Academy of Orthopaedic Surgeons (2019).Management of Rotator Cuff Injuries: Evidence-Based Clinical Practice Guideline.Physical therapy as primary treatment before surgical consideration for shoulder impingement and rotator cuff conditions; corticosteroid injection as a bridge tool for acute pain management:

1. Rotator cuff strengthening (internal and external rotation): - Side-lying external rotation — lying on the unaffected side, rotating the forearm upward against gravity or light resistance - Standing internal and external rotation with a resistance band - Progress to scaption (full-can) and prone Y/T/W exercises as pain allows

2. Scapular stabilization: - Scapular retraction and depression (pulling shoulder blades together and downward) - Wall slides — arms sliding up the wall while keeping the shoulder blades properly positioned - Rows (cable or band) with controlled scapular movement

3. Thoracic mobility: - Thoracic extension over a foam roller - Thread-the-needle rotation

4. Postural correction: - Chin tucks - Awareness of shoulder blade position during daily activities

Exercise volume and load are progressed carefully — too much load too early worsens pain. Most formal PT programs run 6–12 weeks.

What other treatments are used for shoulder impingement?

Corticosteroid injection — an injection into the subacromial space can reduce bursitis inflammation and allow more comfortable participation in PT 4Ref 4American Academy of Orthopaedic Surgeons (2019).Management of Rotator Cuff Injuries: Evidence-Based Clinical Practice Guideline.Physical therapy as primary treatment before surgical consideration for shoulder impingement and rotator cuff conditions; corticosteroid injection as a bridge tool for acute pain management. It is most useful when pain is severe enough to prevent exercise; it is not a long-term solution on its own.

NSAIDs — anti-inflammatory pain relievers can reduce acute pain but do not address the underlying muscle dysfunction.

Activity modification — avoiding overhead activities that provoke pain during the acute phase, while maintaining overall shoulder mobility.

Surgery — subacromial decompression (acromioplasty) was historically common, but multiple high-quality RCTs now show that it offers no benefit over structured physical therapy or even diagnostic arthroscopy (placebo surgery) for impingement symptoms alone 1Ref 1Beard DJ, Rees JL, Cook JA, et al. (CSAW Study Group) (2018).Arthroscopic subacromial decompression for subacromial shoulder pain (CSAW): a multicentre, pragmatic, parallel group, placebo-controlled, three-group, randomised surgical trial.Arthroscopic subacromial decompression offered no extra benefit over diagnostic arthroscopy alone (placebo surgery) for subacromial shoulder pain — key evidence that decompression surgery should not be used in place of structured physical therapy for impingement2Ref 2Nazari G, MacDermid JC, Bryant D, Athwal GS (2019).The effectiveness of surgical vs conservative interventions on pain and function in patients with shoulder impingement syndrome. A systematic review and meta-analysis.Surgery plus physiotherapy compared to physiotherapy alone produces effects too small to be clinically important across 3 months to 10 years follow-up — confirming PT as the appropriate first-line treatment for subacromial impingement. Surgery is generally reserved for confirmed rotator cuff tears that have not responded to thorough conservative care.

What specialist should I see for shoulder impingement?

For most people, a physical therapist with shoulder or sports experience is the right starting point. If there is diagnostic uncertainty, if pain is severe, or if a rotator cuff tear needs to be ruled out, an orthopedic surgeon can evaluate with imaging and offer injection if indicated.

Cloudia can help coordinate with your primary care team and prepare a referral, but the hands-on shoulder rehabilitation is delivered by a physical therapist.