You Want to Run Faster? Start With Your Core!

This simple plank variation trains the torso to stabilize with emphasis on the obliques, the abs on the sides of the torso.

• Place your right elbow on the ground. Extend both legs out so that your body is in one straight line and you're balancing on the outside edge of your right foot.
• Hold this position for 30 seconds, then switch sides to complete a rep. Do two to three reps.