This program changes every 30 days to keep your metabolism guessing. Each week of Body Revolution follows a strict rotation. You will work out 6 days a week, but don't panic—one of those days is an "Active Rest."

Some people try to swap the 2 cardio days for extra strength. Don't. The cardio days are 20 minutes of "circuit style" intervals. They spike your EPOC (afterburn effect), which keeps you burning calories for hours after the workout ends.

Just remember what Jillian says: "Don't wish for it. Work for it." Have you tried Body Revolution? What phase kicked your butt the hardest? Drop a comment below.

Because of the metabolic resistance training, you will gain dense muscle while losing fat. The scale might not move much in weeks 5-8, but your waistband will loosen. Take measurements every 30 days.

But for those of us who don’t want a reality TV crew following us, she created . This isn’t your average "15-minute ab blast." This is a 90-day, metabolic resistance training system designed to completely reshape your body.