The shoulder is a joint, where movement has to be precisely coordinated, as it is a muscle-stabilized joint (with a big ball and small socket as joint partners) (Muffalli, 2012).
The rotator cuff in the shoulder refers to a group of four muscles, which run from the shoulder blade to the top of the arm. Their function is to support and move the shoulder joint and to compress the humerus into the fossa of the shoulder blade (Frontera, Silver and Rizzo, 2015).
A rotator cuff muscle may be strained when it is forcibly contracted or overstretched. This can occur in any activity which requires movement of the shoulder.
Management involves anti-inflammatory medications and enforced rest. Strengthening and correcting abnormal shoulder biomechanics will follow.
Frontera W.R, Silver J.K, and Rizzo T.D.,2015, Physical Medicine and Rehabilitation, Musculoskeletal Disorders, Pain and Rehabilitation, 3rd Edition, Elsevier Saunders, Philadelphia, PA, p: 85
Maffulli N, 2012, Rotator Cuff Tear, Medicine and Sport Science, Krager, London, UK, p: 11