The gluteus Maximus muscle makes up your buttock. It’s is a powerful hip extensor and thus used heavily during activities such as walking, running, and climbing up stairs. Most atheletes abuse this muscle. When overworked trigger points will form, and these points will cause pain to be felt in the hip, sacrum and the as well as deep in the gluteal area. Litterally a pain in the butt!! Trigger points won’t release on their own and require interventions like trigger point massage.