This is a great move for strengthening your abs and hip flexors for running.
- 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 left knee up to meet your right elbow. It should feel a little like running.
- With control, straighten your leg as you slowly peel your back down, vertebra by vertebra, until your shoulders touch the mat last.
- Repeat this motion, switching sides, to complete one rep. Do 12 reps.