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The 15-Minute HIIT Ab Workout Here's a quick rundown of this 15-minute HIIT ab workout. Perform three rounds with working intervals of 45 seconds and rest intervals of 15 seconds.
Whether you prefer the intensity of HIIT or the stability of bodyweight exercises, there's a calorie-burning ab workout for everyone. Read on to learn all about the five best ab workouts that burn ...
High-intensity interval training, or HIIT, is a great way to torch calories, boost your metabolism and get a great workout in a shorter amount of time. And if you're a fan of hopping on the ...