It comes from Beachbody, the same company that brought the world the notoriously intense at-home workouts Insanity and P90X.
A 21 Day Fix Extreme : Everything You Need to Know + Sample Workout
21 Day Fix Extreme Review + Results (Before & After Photos) - Amanda Seghetti
21 Day Fix Workout Plan with 2 DVD's 7 Workouts and Nutrition Plan
Nerissa's 21 Day Fix Transformation - Fitness Fatale
Nerissa's 21 Day Fix Transformation - Fitness Fatale
21-Day Fix Before-and-After Photos
Results Jenn Gray Fitness
Transformation Tuesday: 21 Day Fix Round 2 - Popcorn and Pandas
21 Day Fix Real Results - Round 1!
Team Beast Bound
Body Remodel: Real-Life Body Remodels
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