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We’ve said it before and we’ll say it again — when it comes to building a rock-solid core, endless sit-ups and planks alone won’t do it. Not only does switching things up help you beat boredom, but it ...

You don't need to lie on the floor or spend hours crunching to carve out a strong, defined core. This standing ab routine sculpts your midsection through dynamic, full-body movement, training your abs ...