Burn and Firm: CrossFit Circuit Workout

Whether you’re curious about CrossFit or have already been bitten by this drenched-in-sweat sculptfest, its body-transforming allure couldn’t be more off the hook. « In 20 minutes you incinerate major calories and fat, plus you boost every facet of fitness, such as strength, balance, endurance, and speed, » says Megan May, the head trainer for Reebok CrossFit 5th Ave in New York City. « You’ll really notice the change you’re working so hard for — and fast. » Start here with this six-move sampler from May, using a set of five- to eight-pound dumbbells and a sturdy chair. Do as many rounds as possible — that’s AMRAP to you newbies — of the full circuit in 20 minutes.

Watch the workout video