Instructions:

1. Lie on your back with your knees bent and feet flat on the floor.
2. Place your hands behind your head or cross them over your chest.
3. Engage your abs and lift your shoulder blades off the floor, rotating your torso to one side.
4. Pause for a moment, then lower your shoulder blades back down to the floor.
5. Repeat on the other side, alternating sides with each repetition.