Add Yahoo as a preferred source to see more of our stories on Google. fotostorm/Getty Images Gym machines help target and build specific muscle groups, making them great for ab exercise. Moves like ...

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Our core is made up of four muscle groups that are essential to everyday movements, like walking and lifting. And when people think about core strengthening, crunches are often the first thing that ...

Whether you’re trying to tone up for beach season or simply to improve your core strength, a solid ab workout routine is essential. Although you can do core exercises with little more than a mat, many ...

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