Popsugar Health & Fitness Gymnastics How to Do Hollow Body Rocks This 1 Strength Move I Did as a Gymnast Will Destroy Your Core 11 March 2019 by Samantha Brodsky View On One Page Photo 3 of 3 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Hollow Body Rocks With Weights For added intensity, try these with a five- to 10-pound dumbbell. Previous Next Start Slideshow GymnasticsCore ExercisesWorkoutsAb Exercises