It comes from Beachbody, the same company that brought the world the notoriously intense at-home workouts Insanity and P90X.
21 Day Fix — Monster Home Fitness
21 Day Fix - Jennifer O. lost 68 lbs. and 36.5 inches in 1 year with 9 rounds of 21 Day Fix! I love that 21 Day Fix workouts are only 30
Day 132 And I Have A “Look” #@Dickies #dickies #overalls
21 Day Fix” REVIEW: Beginner & Intermediate BODi Beachbody Workout
Honest 21 Day Fix Review with Photos
Before and After Weight Loss 21 Day Fix
21 Day Fix Extreme Results!!! - Fit Mommy Ashley
21 Day Fix Extreme Day 8 with Tawnya Jean
Before/After Photos Healthy Living with Carolyn Scialdone
Team Beast Bound