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This quick and effective HIIT circuit can be performed at the gym, outdoors, or at home! In addition to torching calories, HIIT or “high intensity interval training” is a great way to boost your stamina and agility. Go through all four exercises without stopping, then rest for 15-30 seconds, and...

Grant Roberts knows a thing or two about whipping celebrities into phenomenal shape. The Canadian fitness guru helped make headlines when he transformed Kumail Nanjiani into a superhero for the role of Kingo, in Marvel’s upcoming movie, “The Eternals” and also boasts an impressive list of...

Prostock-studio / Shutterstock Looking for a workout plan that will kick-start weight loss? We tapped New York City-based CAFS personal trainer Ashley Rosenberg, a group fitness instructor at modelFIT NYC, to develop a four-day weight-loss workout plan to help boost your metabolism and build...