Popsugar Fitness Workouts Plank Challenge: Try It For 2 Weeks Your Arms and Abs Will Transform After This 2-Week Challenge June 8, 2021 by Jenny Sugar View On One Page Photo 1 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 High Plank Start resting on all fours. With your palms flat, raise up off your knees onto your toes. Keep your hands directly below your shoulders. Draw your belly button in toward your spine to prevent your hips from sticking up. With your head and spine in line, keep your back flat, and don't let it round up. Previous Next Start Slideshow WorkoutsStrength TrainingFitness ChallengesPlankPOPSUGAR ChallengesArm ExercisesAb Exercises