If you have 10 days, you can lose eight pounds with this fast-acting intensive workout designed to firm up the butt, flatten abs and slim down thighs. Two 30-minute workouts switch up brief blasts of heart-pumping cardio with intense muscle conditioning. The first focuses on upper body, abs and cardio; the second on lower body, abs and cardio. In addition to the workout, the program offers a 10-day meal program developed by a top nutritionist.