Among patients attending primary health care due to a musculo-skeletal cause, shoulder pain is the third most common disorder after neck- and low-back pain. The most prevalent aetiologies are over-use injuries, degenerative mechanisms and acute injuries. Approximately half of the cases has a subacromial cause. Subacromial pain is often persistent and affects the patients’ functional activities. This motivates the field of research. Other common explanations to shoulder problems are �frozen shoulder� (adhesive capsulitis) or gleno-humeral hyper-laxity with instability phenomenon.
Since this research questions originates from everyday clinical practice, implementation is facilitated.