Popsugar Fitness Sports Simone Biles's and Jordan Chiles's Gymnastics Ab Workout Want to Know What a Core-quake Feels Like? Try Jordan Chiles's and Simone Biles's Ab Workout June 28, 2021 by Samantha Brodsky View On One Page Photo 11 of 30 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 11 Round 4, Exercise 2: Superman Hold Lie on your belly, and extend your arms straight out in front of you. Pull your belly button into your spine. Lift your legs, arms, and chest off of the floor, squeezing your glutes and legs as you do and keeping your arms by your ears. Hold this position for five seconds before lowering to the ground. Previous Next Start Slideshow Jordan ChilesSimone BilesAthletesSportsBodyweight ExercisesGymnasticsCore ExercisesGIF Exercises