Gluteus word is mostly used for Power, as in going Upstairs, Rising from a sitting position, climbing or running rather than walking. Gluteus Maximus is the primary extensor muscle of the hip.it is the outermost of the three gluteal muscles and it makes up a large part of the shape and appearance of each side of the hips. Origin: superior gluteal line of ilium , Posterior sacrum, Lumbar fascia Insertion: Greater trochanter(gluteal tuberosity)of femur, iliotibial tract Nerve supply: Inferior gluteal nerve(L5,S1,2) Blood supply: MUSCULAR BRANCH OF THE INFERIOR GLUTEAL AND SUPERIOR GLUTEAL ARTERIES, The branches of the internal iliac artery. Action: Extention of the femur at the hip joint, lateral rotation of the extended hip. Similar to other lower extremity muscles, the gluteus Maximus can move the femur against the pelvis(hip Extention)