Background: Posterior shoulder tightness has been proposed to contribute to or cause a myriad of shoulder conditions. The tightness of the posteroinferior capsule and the teres minor and infraspinatus muscles of the posterior cuff has been hypothesized to cause osteokinematic [e. g. https://www.diegojavierfares.com/top-super-Geometric-Green-and-Blue-Square-Tablecloth-amazing-save/