Features 4 levels of workouts over a four week period. Each level incorporates Jillians s best-selling 3-2-1 interval system: 3 minutes of strength, 2 minutes of cardio and 1 minute of abs. The 3-2-1 system is repeated three times in each workout and is designed to get you ripped in 30-days. Begin with week 1 and when ready, progress to the next week. Each week will get progressively more difficult, however each workout offers modified moves ideal for both beginners to those more advanced students.