Fitness experts say this dynamic twist on a classic exercise could be the missing link for stronger abs and defined obliques.

Add Yahoo as a preferred source to see more of our stories on Google. Nearly every movement you do in the gym mimics something done in everyday life. Rotation, for instance, allows you to control your ...

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Nearly every movement you do in the gym mimics something done in everyday life. Rotation, for instance, allows you to control your center of mass over your base of support while your body is in motion ...