[Purpose] This study's purpose was to identify abduction angles of the shoulder joint that can provide effective infraspinatus muscle exercises while minimizing the muscle activity of the posterior deltoid muscle. [Subjects and Methods] The subjects of this study were 15 healthy young students in their 20s. Subjects adopted a standing position and performed shoulder external abduction while pus...

OBJECTIVES To characterise the physiological pattern of trunk and shoulders movements during walking and provide a reference for further studies on spine deformities. DESIGN Implementation of a model for measuring spine and shoulder girdle movements during gait. Data collection on a population of eighteen, young, healthy, female subjects. BACKGROUND The analysis of gait modifications in sub...

INTRODUCTION Obesity has been shown to increase the risks of some types of injury in crashes. One way in which obesity may increase injury risk is by changing the routing of the belt relative to the underlying skeletal structures. METHODS Belt fit was measured in a laboratory study of 54 men and women, 48 percent of whom were obese, defined by body mass index (BMI) of 30 kg/m(2) or greater. T...

Grinding is a key physical element in America’s Cup sailing. This study aimed to describe kinematics and muscle activation patterns in relation to torque applied in forward and backward grinding. Ten male America’s Cup sailors (33.6 ̆ 5.7 years, 97.9 ̆ 13.4 kg, 186.6 ̆ 7.4 cm) completed forward and backward grinding on a customised grinding ergometer. In forward grinding peak torque (77 Nm) occ...

The biceps brachii is a bi-articular muscle affecting motion at the shoulder and elbow. While its' action at the elbow is well documented, its role in shoulder elevation is less clear. Therefore, the purpose of this project was to investigate the influence of shoulder and elbow joint angles on the shoulder elevation function of the biceps brachii. Twelve males and 18 females were tested on a Bi...

background patients who have shoulder pain usually have compensatory or contributory deviation of shoulder motion during arm elevation. in the traditional scapulohumeral rhythm, the share of the acromioclavicular (ac) and the sternoclavicular (sc) joint movements and also the role of ac internal rotation angle are unknown. objectives the main purpose of this study was to measure and compare the...

Malunion after double disruption injuries of the superior shoulder suspensory complex accompanied by shoulder pain and dysfunction has been reported infrequently. A 37-year-old man had a double disruption injury (fractures of the distal clavicle and the base of the coracoid process). Conservative treatment resulted in malunion. Twelve months after the injury, pain continued in the coracoclavicu...