- Start on your back with your elbows resting on the floor at a 90-degree angle.
- With your core engaged, roll up to almost sitting while bringing your right knee up to meet your left elbow. It should feel a little like running.
- With control, straighten your leg as you slowly lean your back down, vertebra by vertebra, until your shoulders touch the mat last.
- Alternate with your other leg to complete one rep.