Ideal

• Medial Borders are equidistant from spine

You See

• One medial border is further from spine (scapula is protracted) and/or
• Onemedial border is closer to spine (scapula is retracted)

Likely Cause

Scapula is protracted

• Short scapular protractors, especially pectoralis minor and pectoralis major (indirectly on humerus)
• Short subscapularis (with medial rotation of the arm)
• Long scapular retractors (look for hypertrophy especially in rhomboids and mid trapezius)

Rounded Shoulders

• Long (thoracic) spine extensors
• Kyphosis

Scapula is retracted

• Short scapular retractors and/or long scapular protractors
• Short shoulder lateral rotators
• Short (thoracic) spine extensors