Popsugar Fitness Workouts How to Do Hollow Body Rocks This 1 Strength Move I Did as a Gymnast Will Destroy Your Core March 15, 2019 by Samantha Brodsky View On One Page Photo 2 of 3 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Hollow Body Rocks Variation 2 If these are too challenging with your arms above your head, try them with your arms resting at your thighs. Remember to keep engaging your core. Previous Next Start Slideshow WorkoutsGymnasticsCore ExercisesAb Exercises