Today’s core workout is a plank circuit! You can either do your choice of plank for each circuit… or, you can follow this routine: First Round — Plank // Second Round — Right Side Plank // Third Round — Left Side Plank. If you want an extra challenge, switch out planks for mountain climbers for one of the rounds [it’s so much harder than you’d think!]. Rest 20 seconds after each superset. Enjoy!