This exercise works your core, as well as your chest, shoulders, lats, triceps, and quads, explains Michaels. Since burpees involve explosive plyometric movement, they'll get your heart pumping too.

How to do burpees: Stand with your feet shoulder-distance apart and send your hips back as you lower your body toward the ground in a low squat. Then, place your hands right outside of your feet and hop your feet back, allowing your chest to touch the floor. Push your hands against the floor to lift your body into a plank, and then jump your feet just outside your hands. With your weight in your heels, jump explosively into the air with your arms overhead.

Like burpees, Michaels is a fan of this moving plank exercise because it works your core, in addition to a slew of other body muscles.

How to do mountain climbers: Get into a high-plank position with your wrists directly under your shoulders. Keep your core tight, drawing your belly button in toward your spine. Drive your right knee toward your chest and then bring it back to plank. Then, drive your left knee toward your chest and bring it back. Continue to alternate sides.

The Turkish-getup is a 200-year-old total-body exercise that involves using a kettlebell, and it's a favorite of celebrity trainer Ramona Braganza. While it is slightly complicated, she says that the total-body conditioning move is seriously effective for blasting belly fat.

How to do a Turkish get-up: Holding one kettlebell by the handle with both hands, lie on your side in a fetal position. Roll onto your back and press the kettlebell up toward the ceiling with both hands until the weight is stable on one loaded side. Release your free arm and a free leg to a 45-degree angle with your palm facing down. Slide the heel of the loaded side closer to your butt to grip the floor firmly.

Pushing through the foot on the floor, punch the kettlebell up with the loaded arm and roll onto your free forearm. Don't shrug your shoulder toward your ear with the supporting side. Be sure to keep your chest wide open. Straighten the elbow on the ground and lift yourself to a seated position. Weave your front leg through to the back. Your shin on the back leg should be perpendicular to your shin on the front leg to protect your knees.

Perfectly align your arms: wrist over the elbow, shoulder over elbow over the wrist. Raise your torso to make your upper body erect. Swivel your back knee so that your back shin is parallel with your front shin. Get a grip on the floor with your back toes, then take a deep breath and stand up.

Phelps suggests adding a medicine ball to your burpee to increase the intensity of the exercise and boost your metabolism—all while building a sleek set of six-pack abs.

How to do medicine ball burpees: Hold a medicine ball with both hands with your feet shoulder-distance apart. Extend the ball up overhead, then slam the ball down on the ground as hard as you can, hinging over and sitting your butt back as you slam. As you hinge over, bend your knees. Place your hands on the ground outside of your feet and jump back into a high plank position. Keep your body in a straight line. Then, jump your feet back towards the outsides of your hands so that you are squatting. Please pick up the ball and press it overhead, extending your body and standing tall.

The sprawl is basically a burpee on steroids—a full-body exercise that works as many muscles as possible and burns calories while shaping and toning the upper- and lower body, especially your abs. “It takes the traditional burpee to the next level by having you touch your chest to the ground, then push-up to plank as you continue the move,” explains Braganza.

How to do a sprawl: Standing with your feet shoulder-distance apart, squat down, and place your hands on the ground. Jump your feet back to a plank and lower your body to touch the ground. Push yourself up to a plank and then jump your feet outside of your hands into a squat. Stand back up. That’s one rep. “If you want to burn even more calories, add a jump between each sprawl,” Braganza adds.