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Question: you wish to analyze a persons technique during a pullup...

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You wish to analyze a persons technique during a pull-up. At the start, the person is hanging by his hands from the bar, with his hands about 1-1/2 shoulder-widths apart and his palms facing anteriorly. From this position, he pulls his torso upward until his chin is above the bar, and as he does so, his elbows translate laterally. He then reverses this motion to complete the exercise. Assume that all motion of the torso and upper limbs occurs in one of the anatomical planes during the exercise. Answer the following for this pull-up exercise. Reminder: translation and translate refer to linear motion; rotation and rotate refer to angular motion. i) (0.5 pt) The axis of rotation of each shoulder (i.e. glenohumeral joint) is parallel to which anatomical axis of the torso during this exercise? A. Anteroposterior B. Longitudinal C. Mediolateral i) 0.5 pt) Using proper anatomical terminology, what rotational motion of the joint occurs at each shoulder as the person pulls his torso upward?

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