Get seriously shredded in the shortest time possible with 21 Day Fix EXTREME, created by Autumn Calabrese. This breakthrough 21-day fitness and nutrition program combines simple portion control, clean eating, and extreme 30-minute workouts to deliver a body that is hard, lean, and defined.
Fitness instructor and YouTuber who is known for having invented the 21 Day Fix diet. She is a certified personal trainer, and is a member of the Beachbody community of fitness trainers. She created her eponymous YouTube channel on September 27th, 2013, where she often posts workouts and dieting tips.
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