Which intervention is emphasized for posterior shoulder instability treatment?

Which intervention is emphasized for posterior shoulder instability treatment?

• A. Scapular protraction strengthening for GHJ stability.
• B. Isolated elbow flexor strengthening.
• C. Return to sport immediately with no rehab.
• D. Immobilization for 6 weeks.

Answer: (A)

Posterior shoulder instability is best addressed by building dynamic stability through proper control of the scapula. Strengthening scapular protraction muscles, especially the serratus anterior, helps position and stabilize the scapula so the glenoid tracks the humeral head correctly during movements that could push the head backward. This improves the centralization of the humeral head and reduces posterior translation forces, allowing the rotator cuff and other stabilizers to work more effectively. The other options don’t target this mechanism: strengthening elbow flexors doesn’t influence shoulder stability; returning to sport immediately with no rehab ignores necessary neuromuscular re-education and progressive loading; immobilizing for six weeks risks stiffness and weakness and delays restoration of proper scapulothoracic mechanics.

Posterior shoulder instability is best addressed by building dynamic stability through proper control of the scapula. Strengthening scapular protraction muscles, especially the serratus anterior, helps position and stabilize the scapula so the glenoid tracks the humeral head correctly during movements that could push the head backward. This improves the centralization of the humeral head and reduces posterior translation forces, allowing the rotator cuff and other stabilizers to work more effectively.

The other options don’t target this mechanism: strengthening elbow flexors doesn’t influence shoulder stability; returning to sport immediately with no rehab ignores necessary neuromuscular re-education and progressive loading; immobilizing for six weeks risks stiffness and weakness and delays restoration of proper scapulothoracic mechanics.