Every year around January, flocks of newly minted gym-goers will descend upon their local sweatboxes, insistent on finally losing the last 10lbs. They'll load up on new gear, sign up for a shiny new membership, and then consign themselves to three months of misery in cardio machine hell. No wonder so many people quit the gym in March.

But we're here to tell you that there's a better way to burn fat while building muscle—and this method will go nowhere near an elliptical machine or a treadmill.

Our suggestion? Pick up two dumbbells and get hammering with this workout, the second in our Spring Trim-up workout program. This workout focuses on shoulders and core, but you'll hit plenty of other muscle groups, including your legs, chest, back, and biceps. With a workout like this, you'll be seeing results far faster—and sticking to your New Year's resolutions all year long.

For the full Spring Trim-up workout program (with more videos), check out mensfitness.com/trimup. And if you're really insistent on losing the weight this year, make sure you check out our roster of weight-loss advice.