Shoulder Impingement / Subacromial Pain Syndrome Protocol

Shoulder Impingement, also known as Subacromial Pain Syndrome (SAPS), is a common cause of shoulder pain characterized by the compression or irritation of the rotator cuff tendons and subacromial bursa. Historically, surgical subacromial decompression was widely performed; however, high-quality clinical trials have shown that structured non-operative physical therapy is equally effective. This evidence-based protocol focuses on addressing underlying scapular dyskinesis (abnormal movement of the shoulder blade) and rotator cuff weakness. By restoring proper mechanics and muscle balance, patients can achieve full, pain-free shoulder function and avoid surgery.

Phase I: Pain Control, Inflammation Reduction, and Scapular Setting (Weeks 1-4)

Goals:

• Minimize subacromial pain and inflammation.
• Re-establish pain-free active-assisted range of motion (AAROM).
• Activate periscapular stabilizers (scapular setting).
• Initiate gentle isometric rotator cuff strengthening in neutral.

Precautions & Restrictions:

• Avoid overhead lifting, throwing, or activities that provoke impingement symptoms.
• Limit flexion and abduction past 90 degrees, especially with internal rotation.
• Avoid pushing through sharp, catching pain.

Suggested Exercises:

• Pendulum exercises (Codman's) for passive joint distraction.
• Active-assisted range of motion (AAROM) using a cane/pulley (flexion, abduction, external rotation in scapular plane).
• Scapular squeezes/retraction (squeezing shoulder blades together).
• Isometric rotator cuff exercises (external rotation, internal rotation, abduction against a wall or doorframe at neutral).
• Sleeper stretch (if posterior capsule tightness is present, performed gently).

Criteria to Progress:

• VAS pain score < 3/10 during daily life.
• Pain-free active-assisted range of motion (AAROM) to 120 degrees of flexion.
• Able to actively "set" and hold the scapula in retraction for 10 seconds.

Phase II: Rotator Cuff Strengthening & Scapular Re-education (Weeks 4-8)

Goals:

• Restore full active range of motion (AROM) without compensatory shoulder hiking.
• Progressive strengthening of the rotator cuff muscles.
• Enhance dynamic scapular stability and re-education.
• Normalize glenohumeral and scapulothoracic kinematics.

Precautions & Restrictions:

• Avoid heavy loading or lifting in the impingement zone (90-120 degrees).
• Ensure all strengthening exercises are performed in the scapular plane (approx. 30 degrees forward of the coronal plane).
• Monitor pain levels; there should be no lingering pain (>2 hours) after exercises.

Suggested Exercises:

• Resisted rotator cuff strengthening: band external and internal rotation (arm at side, towel roll under elbow).
• Side-lying external rotation (using a light dumbbell).
• Prone scapular strengthening: prone Ys, Ts, and Ws (targeting middle/lower trapezius and rhomboids).
• Wall slides (using a foam roller) for serratus anterior activation.
• Dynamic hugs (resistance bands) for serratus anterior strengthening.

Criteria to Progress:

• Pain-free active range of motion (AROM) in all planes, including above 90 degrees.
• Good rotator cuff strength (at least 4/5 manual muscle testing) in neutral.
• Demonstration of proper scapular control during active elevation.

Phase III: Functional Restoration & Advanced Strengthening (Weeks 8-12+)

Goals:

• Restore full strength, power, and muscular endurance of the shoulder complex.
• Integrate dynamic, functional, and sport-specific movements.
• Establish a maintenance program to prevent recurrence of impingement.

Precautions & Restrictions:

• Avoid sudden, uncontrolled loading or explosive overhead activity.
• Maintain strict form during advanced exercises; do not increase resistance at the expense of mechanics.

Suggested Exercises:

• Band external/internal rotation at 90 degrees of abduction (if completely pain-free).
• Advanced periscapular exercises: push-up plus (on wall, table, or floor), planks.
• Upper body ergometer (low resistance, moderate pace) or rowing.
• Eccentric rotator cuff strengthening (controlled lowering of bands or weights).
• Gradual return-to-activity program (throwing, swimming, or weightlifting progression).

Criteria to Progress:

• Full, pain-free active ROM throughout all functional patterns.
• Rotator cuff and scapular stabilizer strength within 90-95% of the uninvolved side.
• Successful return to daily work, hobbies, and sports activities without symptoms.

These guidelines represent a standard rehabilitation protocol. Individual recovery rates vary significantly depending on the size of the repair, bone/tissue quality, and general patient health. Your surgeon may modify this protocol specifically for you.

Disclaimer: This protocol is for educational purposes and is not a substitute for professional medical advice. Always consult your surgeon or physical therapist before performing any exercises or modifying activity restrictions.