By reference to anatomical study, the gluteus medius appears to have at least three different regions (Gottschalk et al. 1989;
Jaegers et al. 1992; Al - Hayani et al. 2009; Semciw et al. 2013a; Flack et al. 2014), although some investigators have proposed limiting the number to two (Duparc et al. 1997).