Rotator Cuff Injuries in AFL: What Happens When the Shoulder’s Stabiliser Fails

Jul 5

The rotator cuff is one of those anatomical terms most athletes have heard but few can explain. It’s also one of the most important structures in the AFL player’s shoulder, and injuries to it are more common than the published injury statistics suggest because mild strains are frequently trained through without formal diagnosis.

The Four Muscles of the Rotator Cuff

The rotator cuff is a group of four muscles that originate on the scapula (shoulder blade) and insert on the proximal humerus (upper arm bone). Together they compress the humeral head into the glenoid socket, providing dynamic stability throughout shoulder movement.

Supraspinatus: Runs above the spine of the scapula, abducts the arm and initiates the first 15 degrees of elevation. Most commonly injured, particularly with impingement.

Infraspinatus and teres minor: Posterior rotator cuff, externally rotate the shoulder. Vulnerable in overhead activities and tackle positions.

Subscapularis: The largest rotator cuff muscle, on the anterior surface of the scapula. Internally rotates and is the primary dynamic stabiliser against anterior translation.

Understanding the anatomy of these four muscles, their individual lines of pull, and how they interact during sport-specific movements is foundational for any physio, S&C coach, or athlete who wants to train around shoulder injury. This is covered in detail in our anatomy course.

How Rotator Cuff Injuries Happen in AFL

Marking contests are high-risk: arms elevated, force applied through an outstretched limb. Ground-level contact with the arm out to the side compresses the supraspinatus against the acromion (impingement). Repetitive handballing volume loads the rotator cuff through internal rotation in extension.

Symptoms and Assessment

Rotator cuff strains present as shoulder pain with specific movements, typically elevation above 90 degrees, internal rotation, or reaching behind the back. Weakness on resisted testing of the specific muscle is the clinical finding that differentiates a cuff injury from other shoulder pathology.

Ultrasound or MRI confirms the extent of the tear.

Treatment

Partial tears (Grade 1-2): Progressive rotator cuff loading through pain-free range, scapular stabiliser strengthening, and progressive overhead loading over 4-8 weeks.

Full-thickness tears: Surgical consultation required. Younger, active AFL players with full-thickness tears typically benefit from surgical repair. Return to sport post-operatively takes 4-6 months.

The rehabilitation cornerstone for partial tears is the ER/IR strengthening ratio: external rotation strength should equal at least 75% of internal rotation strength. Most athletes present with significant external rotation deficits.

Return to AFL

Symmetrical strength testing, full pain-free range of motion, and sport-specific loading (handballing, marking, falling techniques) cleared before full return.

Want to understand this injury at a deeper anatomical level? The Club Physio’s online anatomy course breaks down the structures, biomechanics, and load patterns behind the most common sports injuries. Built for athletes and therapists alike. [Explore the course at theclubphysio.com.au]

josh zoppo