Jillian Michaels, "TV's toughest trainer", leads three 20-minute workouts that get progressively more difficult. Each workout consists of:
2-minute warmup
Three circuits of 3 minutes on strength, 2 minutes of cardio and 1 minute on abdominals
2-minute cool down.
Jillian Michaels: 30 Day Shred Blu-ray, News and Updates
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