Your gluteus maximus, gluteus medius and gluteus minimus are the muscles that make up your butt. Yep. I said it, they are the muscles that compose your rump and are collectively called the gluteal group. These are powerful, hard working muscular tissues that really need your massage therapist to work on them during your sessions. During your daily activities, any time you are moving your hip joint you are using these muscles to do so. They even help to stabilize your knees. They are always working when you are moving – they are powerhouses!