Popsugar Health & Fitness Core Exercises Jillian Michaels Ab Workouts Holy Abs! 11 Workout Videos That Show How Jillian Michaels Carves Her Core 30 October 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 Core ExercisesWorkoutsAb ExercisesJillian Michaels