Jillian Michaels' 30 Day Shred will guide you through her exclusive 3-2-1 Interval System that combines strength, cardio and abs to blast through calories for dramatic results in 30 days. Jillian Michaels' 30 Day Shred: Level 3 is based on Jillian's exclusive 3-2-1 Strength/Cardio/Ab training circuit to blast through calories for a dramatic 30 DAY SHRED.