Mean scapular rotations during humerothoracic flexion during arm elevation (minimum [min] to maximum [max]) and lowering (max to min). The solid line represents the mean values of the participants with normal motion; the dashed line represents the mean values of the participants with obvious dyskinesis during weighted test movements. The minimum values for humerothoracic flexion for the normal and abnormal groups were 9.8 and 8.2, respectively; the maximal values were 149.6 and 150.0, respectively. A, Scapular posterior tilting, with negative or decreasing values representing anterior tilting. B, Scapular upward rotation, with decreasing values representing scapular downward rotation. C, Scapular external rotation, with decreasing values representing scapular internal rotation. D, Clavicular elevation, with decreasing values representing clavicular depression. E, Clavicular protraction, with decreasing values representing retraction. The clavicle remains retracted with respect to the coronal plane of the thorax and, therefore, exhibits negative values. Error bars indicate standard error. ^a Indicates P < .05.