Shoulder pain is very common and causes substantial morbidity. Standardised classification systems based upon presumed patho-anatomical origins have proved poorly reproducible and hampered epidemiological research. Despite this, there is evidence that exposure to combinations of physical workplace strains such as overhead working, heavy lifting and forceful work as well as working in an awkward posture increase the risk of shoulder disorders. Psychosocial risk factors are also associated. There is currently little evidence to suggest that either primary prevention or treatment strategies in the workplace are very effective and more research is required, particularly around the cost-effectiveness of different strategies.
KeywordsShoulder pain; impingement syndrome; frozen shoulder (adhesive capsulitis); rotator cuff
Introduction and ScopeAccording to population surveys, shoulder pain affects 18-26% of adults at any point in time [1][2][3][4], making it one of the most common regional pain syndromes. Symptoms can be persistent and disabling in terms of an individual's ability to carry out daily activities both at home and in the workplace [5,6]. There are also substantial economic costs involved, with increased demands on health care, impaired work performance, substantial sickness absence, and early retirement or job loss [7][8][9][10].The shoulder has evolved to withstand heavy physical demands and to do so over an unusually wide range of motion. To achieve this, it is not a simple 'ball and socket' joint but rather a complex composed of four articulations and a supporting arrangement of bones, muscles and ligaments within and outside of the joint capsule. However, its complexity and the nature of the demands on it make it susceptible to a range of articular and peri-articular