The Top 10 HIIT Videos on Right Now, Rated by a Trainer

A trainer offers his honest feedback regarding the top 10 HIIT videos on . See if they're all they’re cracked up to be.

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Shadow boxing workout: fat-burning cardio circuit - Women's Fitness, shadow boxing calories burned

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The Best HIIT Workout for Muscle Building

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Full Body HIIT Workout That Won't Cause Bulk - Rachael Attard

Weight Loss: Cardio or Weight Training?