By Sarah Klein
The secret behind a good workout is simple. While fancy equipment and complicated exercises can be fun, when time and resources are tight, all you really need to stay fit is your body (and a set of dumbbells, if you want to kick things up a notch). The moves in this slideshow are simple and effective — and they can be done anywhere you are, whether it’s a cramped apartment, a hotel room, on the beach or — yep — even at a gym.
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