MUSCLES ENGAGED Glutes Gluteal Muscles (Glutes) are one of the strongest muscles in the body and are the connecting point between your legs and back muscles. Glutes are used in a variety of actions from moving the leg to extending and rotating the hip, as well as extending and rotating the trunk of the body. Back (lower) The lower back is often not trained because it is not visible in the mirror. If you have weak lower back muscles, there is nothing to help pull back against the spine, putting you at risk of developing poor posture (hunched over). Weak lower back muscles can also lead to lower back pain. Exercise Instructions Step 1 Start in a push-up position with your hands on the bench. Your shoulders should remain in line with your wrists. Keep your back straight and your abs tight while flexing your buttocks. Step 2 Keeping your legs straight and your body rigid, raise your leg off the ground and squeeze your glutes at the top of the motion. Step 3 Lower your leg to the floor and repeat.