Pike Position - Start in plank, hands under shoulders, feet in line with hips and pressing into wall. Engage abs as you lift hips until body forms a wide inverted V (as shown). Return to start for 1 rep. Do 15 reps.
Booty Bridge - Lie faceup with head away from wall, right knee bent and foot on floor, left knee bent 90 degrees with foot pressing into wall. Extend right leg toward ceiling and lift hips until body forms a straight line from left knee to shoulders (as shown). Pause, then lower hips for 1 rep. Do 15 reps. Switch legs; repeat.