We live in an age where rock-hard, six-pack abdominal muscles are the goal of many workout enthusiasts. We all want that washboard look, but which ab exercises actually work? There are two sets of muscles to target: the rectus abdominis muscles (the ones you engage during regular situps, that run from your sternum to your pelvis) and the transverse abdominis (the deepest ab muscles that wrap around the spine and help stabilize your core).
You may think of power bars as protein-loaded snacks that are perfect pre- or post-workout. And while you’re not entirely wrong, you’re not entirely wrong, either. In addition to high protein levels, many power bars are surreptitiously loaded with sugar, which will bring any ab-seeking efforts of yours screeching to a halt. So, if you’re going to reach for a bar, be sure to check the nutrition facts first. Many bars—like the offerings from ONE or thinkThin—only have 1 gram of sugar for 20 grams of protein (and still taste delicious, to boot).
Kneel on a mat on all fours with your hands directly under your shoulders. Stretch your legs back one at a time to come into plank position (the “up” part of a push-up); engage your ab muscles. Your body should be long and straight; don’t let your hips sag or lift your butt too high. Imagine there’s a seat belt tightening around your waist, drawing your lower-ab muscles inward.
Now you can shred your abs like a skier shreds the slopes, with the dumbbell skier swing.

 Gaddour took the typical form a downhill skier uses when flying down the face of a mountain, and combined it with the action of a kettlebell swing. The combination results in a superfast exercise that simultaneously torches fat, builds explosive strength, and works your entire core from your shoulders to your hips.
To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.

best ways to build core

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