A Gluteul muscle strain involves a group of 3 muscles that form your buttocks. Each of the gluteus muscles plays its part in stabilising and moving the hip and pelvis. Any one of these muscles’ fibers can be torn if the load placed on the muscle exceeds its normal boundaries. This will cause a gluteus muscle strain. “Jumpers” are more likely to tear one of these muscles, due to the high intensity of the muscle contraction that is needed to push off out of a stretched position.