There are three main muscles that comprise your butt: gluteus maximus; gluteus medius; gluteus minimus . Its origin is the posterior line of the upper ilium, the posterior surface of the lower sacrum, and the side of … Schiller Blue Surface electrodes (Schiller America Inc.; Doral, FL) were placed over the gluteus medius and gluteus maximus muscles of the subject's dominant side, 4 per standard EMG protocol. This muscle is the largest of the gluteal group. The muscles on the side of your butt — the gluteus medius and minimus — play a major role in stabilizing your pelvis when you stand on one leg, says Bret Contreras, PhD, CSCS, a strength-and-conditioning specialist and author who’s known in the fitness community as The Glute Guy.

24 In order to ensure consistent electrode placement throughout testing, electrodes were secured with surgical tape. Gluteus Maximus.