What used to be called shoulder impingement is now more accurately termed subacromial pain syndrome (SAPS). It's the same condition — pain in the top and front of the shoulder, especially with overhead activity — but the new name reflects our better understanding: it's rarely about a specific mechanical impingement, and more about a broader pain pattern involving the rotator cuff, bursa, and surrounding tissue.
What patients feel
- Pain in the top or front of the shoulder
- Worse with overhead reaching, lifting, or reaching behind the back
- Painful arc between about 60-120° of arm elevation
- Night pain, especially lying on the affected side
- Weakness with resisted movements
Why the terminology matters
The old "impingement" model implied that a piece of tissue was being physically pinched under the acromion (the bony roof of the shoulder), and that surgical decompression would fix it. Modern research shows this model was overly simple. Structural findings on imaging (bone spurs, cuff tears, bursal thickening) don't reliably predict who has pain, and surgical decompression outcomes are similar to structured rehab in most cases.
What's usually going on
A combination of:
- Rotator cuff dysfunction or tendinopathy
- Weak scapular stabilizers letting the shoulder blade tilt forward
- Poor thoracic mobility limiting overhead range
- Compensatory upper trap overactivity
- Sensitization of the surrounding soft tissue and bursa
Evidence-based treatment
Progressive rotator cuff loading — heavy slow resistance and eccentric work. The primary driver of long-term outcomes.
Scapular stabilization — serratus anterior, lower trap, mid trap.
Thoracic mobility — restoring extension and rotation.
Manual therapy — joint mobilization, soft tissue work.
Modalities — shockwave and laser for chronic cases.
Activity modification without complete rest.
What to avoid
Long-term steroid injections, complete rest, and passive-only care all produce worse long-term outcomes than active loading.
Most SAPS resolves within 8-16 weeks of structured care. If you've had persistent shoulder pain with overhead activity, come in for an assessment.