While guys spend a lot of time working their abs, they don't pay as much attention to their backside. And that's a problem because one of your body's largest and most powerful muscle groups resides there: your glutes. So BJ Gaddour, C.S.C.S., creator of the Bodyweight Muscle Burners DVD, combined one of your favorite core moves -- the situp -- with one of the best butt-building moves -- the hipup -- to hit your front and backside in one go.

"The situp to hipup is the ultimate ab-and-glute-carving exercise," says Gaddour. Plus, transitioning between the two moves calls into play a lot more muscles than just doing each move separately. This will ramp up your heart rate and make you break a sweat faster, he says. (Think you have the pushup down? Think again. Here are 5 Body-Weight Exercises You're Doing Wrong.)

Ready to try it? Watch the video to learn how to perform the situp to hipup with perfect form.

Add these 4 Post-Workout Moves That Burn Fat to your regimen, and that extra belly roll will be gone soon.