Marathon Training and Weight Gain

"I'm training for a marathon and I'm gaining weight!" Surprisingly, this complaint is actually somewhat common. Often, people start marathon training with the expectation that the pounds will just start falling off them. But some are shocked when they see that number on scale start to creep up.

There are a few reasons why this can happen. For one, you're most likely building more muscle weight, which is denser than fat. But there are some other, less obvious reasons why you're not losing weight.

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