Shoulder blade winging occurs when the medial border of the scapula lifts away from the rib cage, creating a visible protrusion. This occurs due to weakness in the muscles that hold the shoulder blade against the thorax, most commonly the serratus anterior. Understanding why your shoulder blade wings out guides appropriate intervention to restore normal scapular mechanics. Research published in the Journal of Orthopaedic and Sports Physical Therapy found that scapular winging significantly alters shoulder kinematics and increases risk of shoulder impingement and rotator cuff problems (PMID: 19194025). The study demonstrated the importance of proper scapular positioning for shoulder health. This article explains the causes of scapular winging and provides exercises to restore proper shoulder blade position and function. Understanding Scapular Winging The shoulder blade should sit flat against the rib cage, with only normal contours visible. Winging occurs when the medial (inner) border or inferior angle of the scapula protrudes posteriorly. Medial winging: The inner border lifts, often due to serratus anterior weakness or long thoracic nerve issues. Inferior angle winging: The bottom point of the scapula lifts, often from lower trapezius weakness. Static winging: Visible at rest, indicating significant muscle weakness or nerve involvement. Dynamic winging: Appearing during movement, particularly wall push-ups or forward arm reaching, suggesting muscle insufficiency during activity. A study in Clinical Biomechanics showed that serratus anterior weakness produces characteristic winging patterns that differ from winging caused by trapezius weakness (PMID: 15621289). Causes of Shoulder Blade Winging Serratus anterior weakness: The serratus anterior holds the scapula flat against the rib cage. Weakness allows the medial border to lift, particularly during pushing movements. Long thoracic nerve injury: This nerve supplies the serratus anterior. Injury from trauma, surgery, or repetitive strain causes serratus weakness and resulting winging. Trapezius weakness: The middle and lower trapezius help control scapular position. Weakness affects inferior angle positioning. Spinal accessory nerve injury: This nerve supplies the trapezius. Injury affects trapezius function and scapular stability. Muscle imbalances: Without nerve injury, imbalances from poor posture or training can create functional winging from relative weakness. Identifying Your Winging Pattern Assessment reveals the nature of your winging: Wall push-up test: Perform a slow push-up against a wall while someone observes from behind. Winging that appears during the movement indicates serratus anterior insufficiency. Arm elevation test: Raise arms overhead while observed from behind. Winging during elevation suggests trapezius involvement. Resting assessment: Visible winging at rest indicates more significant weakness than winging appearing only during movement. Asymmetry: Compare both sides. Unilateral winging suggests nerve injury or one-sided weakness. Primary Exercises for Scapular Winging These exercises strengthen the muscles that control scapular position against the rib cage. 1. Shoulder Blade Squeeze Why this works: Scapular retraction activates the middle trapezius and rhomboids, which help control scapular position and counteract winging tendencies. JME 165 Either sitting or standing, squeeze your shoulder blades together. 2. Forward Arm Raise Why this works: Controlled forward elevation challenges the serratus anterior to maintain scapular position during movement. Progress with awareness of preventing winging. JME 44 Starting with your hand at the side, bring your arm up, over your head, then back down to the side. 3. External Rotation Why this works: Rotator cuff strength supports overall shoulder function and reduces compensatory patterns that affect scapular position. JME 47 With your arms at a 90 degree angle, rotate them both up and down - keeping your shoulders in the same position. 4. Hands Behind Back Why this works: This position activates muscles that depress and retract the scapula while stretching anterior structures that may contribute to poor positioning. JME 55 Bring your hands together behind your back and extend for a shoulder stretch. Supporting Exercises Additional exercises address factors contributing to scapular winging. 5. Arm Circles Why this works: Comprehensive shoulder movement with scapular awareness trains proper muscle activation patterns throughout the range of motion. JME 56 Rotate one arm up and down around your elbow. 6. Cross Body Stretch Why this works: Posterior shoulder tightness can alter scapular mechanics. Maintaining flexibility supports normal positioning. JME 52 Hug one arm across your body for a gentle stretch. 7. Upper Trap Stretch Why this works: Upper trapezius dominance can accompany lower trap and serratus weakness. Balancing the trapezius components supports proper scapular control. JME 10 Have your fingertips face forward and tilt your head to that side. Then rotate for your fingertips to face backward and tilt your head to the other direction. 8. Levator Scapulae Stretch Why this works: Levator tightness affects scapular position. Releasing this muscle allows better positioning of the shoulder blade. JME 14 With your hands on your lap, gently tilt your head toward your chest. Progressive Exercises for Serratus Anterior The serratus anterior requires specific attention in most winging cases: Wall slides: Stand facing a wall with forearms on the wall. Slide arms up while maintaining scapular contact with the rib cage. Serratus punches: Lying on back, push arms toward ceiling, focusing on the "plus" at the end of movement where the scapula protracts. Wall push-up plus: At the end of a wall push-up, push further to protract the scapulae, directly strengthening the serratus. Quadruped progressions: On hands and knees, maintain flat scapulae while shifting weight or lifting limbs. When Scapular Winging Requires Professional Evaluation Seek evaluation for: Sudden onset: Winging appearing suddenly after trauma or medical procedures may indicate nerve injury. Significant winging at rest: Prominent winging without movement suggests more serious weakness requiring assessment. Associated symptoms: Pain, numbness, or weakness in the arm accompanying winging needs evaluation. No improvement with exercise: Winging that does not respond to strengthening over 6-8 weeks may have underlying causes requiring diagnosis. Common Mistakes in Addressing Scapular Winging Ignoring the cause: Treating winging without understanding whether it stems from serratus, trapezius, or nerve issues limits effectiveness. Overhead training with winging: Pressing and pulling overhead with poor scapular control worsens mechanics. Establish control before loading. Generic shoulder exercises: Standard shoulder exercises may not target the specific muscles causing winging. Targeted intervention is needed. Expecting quick resolution: Muscle weakness causing winging takes weeks to months of consistent work to correct. Expected Timeline for Improvement Functional winging from muscle imbalance often shows improvement within 4-6 weeks of targeted exercise. More significant weakness may take 3-6 months. Nerve-related winging has variable recovery depending on the nature of nerve involvement. Start Moving Better Today Shoulder blade winging occurs when the muscles holding the scapula against the rib cage are weak or injured. Understanding why your shoulder blade wings out identifies whether serratus anterior, trapezius, or nerve factors are involved. These exercises target the muscles responsible for proper scapular positioning. simplmobility provides joint-specific shoulder mobility programs designed for scapular control. Each routine takes 2-3 minutes and targets the muscles that stabilize the shoulder blade. Try simplmobility Free for 14 Days Frequently Asked Questions Is scapular winging serious? Severity varies. Mild dynamic winging from muscle imbalance is common and correctable with exercise. Significant static winging may indicate nerve injury requiring evaluation. Can you fix scapular winging without surgery? Most cases of scapular winging from muscle weakness respond to targeted strengthening exercises. Surgery is typically reserved for cases with confirmed nerve injury that does not recover. Does scapular winging cause shoulder pain? Yes, winging alters shoulder mechanics during arm movement, increasing risk of impingement and rotator cuff problems that cause pain. How do I know if my winging is from nerve damage? Nerve damage typically causes sudden onset, significant winging visible at rest, and may follow trauma or surgery. Professional evaluation with nerve testing provides diagnosis.