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Why is it that some can keep lost weight at bay as long as their diet is ironclad and they don\u2019t skip any workouts, but as soon as they slip up even a little bit, they gain weight? And when they gain, they seem to gain it faster and more easily than should be normal. It just doesn\u2019t seem fair. What\u2019s going on here?

(This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Brock Armstrong)