Popsugar Fitness Workouts Jillian Michaels Ab Workouts 11 Core Workouts Jillian Michaels Does to Carve Her Enviable Abs November 26, 2018 by Christina Stiehl View On One Page Photo 4 of 11 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Jillian Michaels (@jillianmichaels) on Sep 27, 2018 at 5:22am PDT Share This Link Copy ← Use Arrow Keys → 4 Core Crusher Get creative in the gym with this core crusher. Jillian recommends doing each move for 30 seconds for four rounds total. Previous Next Start Slideshow WorkoutsJillian MichaelsCore ExercisesAb Exercises