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 5 of 11 ADVERTISEMENT () Start Slideshow View this post on Instagram A post shared by Jillian Michaels (@jillianmichaels) on Nov 15, 2017 at 11:28am PST Share This Link Copy ← Use Arrow Keys → 5 Plank Challenge Test how long you can hold a high plank and side plank with this plank challenge. Previous Next Start Slideshow WorkoutsJillian MichaelsCore ExercisesAb Exercises