Popsugar Fitness Workouts 4-Week Beginner-Friendly Core Challenge This 4-Week Core Challenge Is Perfect For Beginners July 1, 2024 by Jade Esmeralda View On One Page Photo 10 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 10 Superman Lie flat on your stomach, with your forehead against the floor. In one motion, lift your hands and feet off the ground, extending up towards the ceiling. Pause for a moment and then slowly return back to the starting position on the floor. Previous Next Start Slideshow WorkoutsFitness ChallengesAb Exercises