The Pelvic Scoop ab exercise works your lower back, rectus and transversus abdominis, obliques, and butt.
-Cinch-It Secret. Pelvic Scoop. For this move, the key is to really squeeze your abs to scoop your pelvis up. Try not to let your legs do all the work as you press through the heel. Your body should form a C shape, not a straight line. Do 10 reps, switch sides, and repeat. Do 3 sets total.