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 2 of 11 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Jillian Michaels (@jillianmichaels) on Jan 24, 2018 at 8:05am PST Share This Link Copy ← Use Arrow Keys → 2 Core Challenge This core challenge will strenthen your middle and also get your heart rate up. Previous Next Start Slideshow WorkoutsJillian MichaelsCore ExercisesAb Exercises