Jillian Michaels isn't just the tough-as-nails trainer who gets others motivated; she actually practices what she preaches. Based on her enviable abs and the tough workouts she posts on Instagram, she's in pretty damn good shape. Jillian showed off how she gets such a strong core with an impressive circuit that will challenge your balance, strength, and patience.
All you need for this circuit are a couple plyo jump boxes and your own bodyweight. Jillian recommends doing each move for 30 seconds and for three rounds total.
Although this circuit is quick, it will definitely fire up your core. Pair it with her other ab workout and you will leave the gym feeling sweaty, strong, and sore.