For some lucky Boise running friends they start running and the pounds just melt off. But for many others (like you and me) it's just not that easy. In fact, counter-intuitive as it may seem, it's shockingly easy to gain weight on the way to the starting line. In a 2010 Tufts University study of 64 runners in marathon training researchers found that during the 12-week buildup to the marathon, while some runners lost as much as 27 pounds; some gained as much as 14. Some 63% of the subjects said that they ate more during training.
While you do need to eat enough to support your running routine—and eat more if you're logging monster mileage—it's way too easy to go overboard. Here's how to avoid weight gain on the way to the starting line.