7. Plank to Bear Begin in plank position with a slider or paper plate under the ball of each foot. Slowly bend both knees in toward the chest while keeping the arms straight, shoulders over the wrists, and maintain a flat, tabletop back. Maintain a stable upper body as you push your legs back to plank to complete the rep. Do as many reps as you can in 30 seconds. Image Source: POPSUGAR Photography / Ericka McConnell NEXT GALLERY Start Your Day Out Right With These Healthy Grab-and-Go Breakfasts by Susi May