{'fraction_non_alphanumeric': 0.029838709677419355, 'fraction_numerical': 0.0024193548387096775, 'mean_word_length': 4.90952380952381, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A Comparison Between the Rotator Cuffs of the Shoulder and Hip

TO MANY HEALTH PROFESSIONals, athletic trainers and conditioning coaches, the anatomy of the shoulder is relatively simple to understand. The shoulder, known as the glenohumeral joint, is a multi-axial, synovial, ball and socket articulation between the head of the humerus and the glenoid fossa of the scapula (5). The shoulder has six degrees of freedom that include flexion/extension in the sagittal plane, abduction/adduction in the frontal plane and internal/external rotation in the transverse plane. The arthrokinematic motions of the shoulder are basic rolls and glides, based on a convex humeral head moving on a concave glenoid fossa (6). The shoulder joint generally works in an open chain context, but may be involved in closed chain activities, such as push-ups. The shoulder joint is a relatively unstable joint that, to an extent, depends on muscles, or active structures, rather than bones and ligaments for its support and integrity (5). Consequently, with no muscle activity at the shoulder, the humeral head sits high in the glenoid fossa of the scapula, a location of decreased surface area. Therefore, a few small muscles must provide the support and sta-