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Resisted AC Joint Extension Test

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Other Names

  • AC Resisted Extension Test
  • Resisted Arm Extension Test
  • Acromioclavicular resisted-extension test


Demonstration of the AC Joint Extension Test[1]


  • The patient is seated, examiner behind patient
  • Shoulder flexed to 90°, internally rotated, elbow flexed to 90°
  • The examiner then places hand on lateral elbow and asks patient to abduct against resistance
  • Positive Test
    • Pain at the AC joint



  • Acromioclavicular Joint Etiology
    • Sensitivity: 72%[2]
    • Specificity: 85%
    • PPV: 20%
    • NPV: 98%

See Also


  1. Image courtesy of youtube.com, "AC Resisted Extension Test"
  2. Chronopoulos E1, Kim TK, Park HB, Ashenbrenner D, McFarland EG. Diagnostic value of physical tests for isolated chronic acromioclavicular lesions. Am J Sports Med, 2004; 32(3): 655-61.
Created by:
John Kiel on 8 August 2019 23:51:23
Last edited:
25 April 2023 17:39:20