MUSCLES ENGAGED Abdominals The abdominal muscles (abs) provide movement and support to your core area. The deeper and closer to the spine the particular abdominal muscle is, the more effect over body posture it will have, and this often contributes significantly to a healthy back. 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. Exercise Instructions Step 1 Start on your back with shoulders curled up, your abdominals contracted and your heels raised off of the ground. Step 2 Keeping your lower back on the ground and your legs straight, flutter your feet in a scissor motion. Step 3 Continue exercise for recommended number of repetitions.