This photo of Bettie inspired the diagonal crunch we do in the Bettie Page Fitness: Total Body Strength & Cardio video. Get the full workout at bettiepagefitness.com (click announcement bar at top of this page to shop!), and try this crunch in the meantime
Start with your right ankle on your left knee, hands behind your ears or head and elbows out. Crunch as far as you can toward the right knee, aiming your left shoulder (not the elbow) toward your right knee. Do a total of 12 full reps, then do 12 pulses at the top of the crunch. Repeat on other side, then do each side twice more for a total of 3 sets.
*Make it easier: Keep one arm down (the one on the side of the lifted foot) with your hand touching the ground.
*Make it harder: At the top of each regular crunch (not the pulses), extend the left arm straight out past your right leg (opposite for other side, of course).