Impinging on the impingement theory
In the 1970s and 80s Neer coined the term “subacromial impingement syndrome” (SIS) where he claimed that irritation of the rotator cuff, biceps tendon, and/or subacromial bursa contributed to rotator cuff tears & shoulder pain. This theory has been widely accepted & taught in the education system1. However a series of research studies and reviews …