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Figure 5: Graph shows average minimum distance (± standard deviation) for eight volunteers from the acromion to the humeral head in neutral and loaded ABER position. * = structure was significantly closer (P < .01) to acromion in loaded ABER position. GT = greater tuberosity, Infra = infraspinatus insertion site, LT = lesser tuberosity, Subscap = subscapularis insertion site, Supra = supraspinatus insertion site.