Home Health-Fitness Burn megacalories, blast fat, and sculpt all over in less than 30 minutes with Jillians new kick-butt workout. Based on Jillian Michaels Bodyshred, a high-energy circuit class offered at Crunch gyms nationwide, this results-driven combo of strength, cardio, and core circuits will leave you tight, toned, and totally ready to show off your hard work. What are you waiting for?