Elise Joan talks LIVESTRONG.COM's planking challenge and how to do a proper plank
Planking is one of those exercises we love to hate. Holding a plank builds core strength and improves posture, digestion and balance -- but it's killer!
Planking is one of those exercises we love to hate. Holding a plank builds core strength and improves posture, digestion and balance -- but it's killer!