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Jillian Michaels is no stranger to a challenge circuit [3]. The fitness guru loves inspiring (or torturing?) people with workouts on her Instagram page and workout app, My Fitness by Jillian Michaels [4]. On Nov. 29, Jillian upped the ante with a core-focussed circuit she dubbed a "tummy tightening workout."
The workout included V-ups with a bar, a plank variation with a push-up, and bicycle crunches [6] with a medicine ball. Jillian recommends to do each move for 30 seconds for four rounds total. Jillian makes every exercise look easy, but you will definitely feel the burn after the first 30 seconds. This workout won't just ignite your abs, but your whole core.
If you're looking to spice up your ab day or want to get in a quick workout at home [7], try these moves. Just be warned — it may hurt to laugh the next day.