Workout Targets: Lower back, rectus and transversus abdominis, obliques, and butt
Starting position: Lie faceup on floor with back resting on folded towel, knees bent and feet flat on floor, arms by sides.
Start working out: Cross right ankle onto left thigh just above knee so bent right knee points out to side; flex left foot so only heel rests on floor.
Rounding lower back and squeezing abs, lift hips off floor so pelvis tilts up toward ribs. Curl pelvis as far as you can without arching back; pull abs in to lift rather than press through left heel. Lower to floor.
Frequency: Do 10 reps, holding the lift for 10 seconds on the final one. Switch sides and repeat. Do 3 sets.