04/08/2014 04:09 pm ET Updated Apr 08, 2014

The Best Arm Machines At The Gym

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I've always been a runner and, more often than not, I find myself hitting the gym for some quick-and-easy treadmill time. But, after relying on this slightly bland workout throughout the winter, I found myself in a plank competition with my boyfriend (don't ask), and my arms quickly gave out. I'd been developing my lower body and core strength, but my arms just weren't up to par.

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