This 30-Day Plank Challenge Will Transform Your Body

04/16/2015 11:18 am ET | Updated May 13, 2015
Brook Pifer via Getty Images

A strong core is the foundation to a strong body. Think about it: A tree would fall if its trunk wasn't solid and stable. Doing core work isn't just about your middle, either. Having a strong core will make you a better runner, surfer, or yogi (or whatever activity you like to do) while improving your posture and balance. Working your core can also protect you from low back pain — and yes, it’ll tone your abs, too.

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