News flash: Dumbbells can make fat disappear even when you’re not hoisting them. Strength-training reps helped exercisers melt 79 percent more calories in the hour post-workout than those who hadn’t lifted, a study from Arizona State University found. « Think of that afterburn as your metabolism working overtime while you lounge, » says celeb trainer Brian Nguyen, the owner of Brik Fitness in Redondo Beach, California. To stoke your inner-cinerator, grab a set of weights (try 10- to 12-pounders) and do Nguyen’s carve-you-up combo.
Watch the full workout video