Many people start (and continue) running because it's a highly effective—and inexpensive—way to lose weight and keep it off. Running is a great calorie burner, but it's all too easy for all but the highest mileage runners to consume more calories in a sitting than they have burned off in a training run.
The good news is that a National Runner's Health Study shows that runners gain less per decade than their sedentary counterparts. But that doesn't mean we're immune from weight gain; runners gain an average of 3.3 pounds per decade! Follow these guidelines to help maintain your current weight, or to lose those extra pounds.