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One of the most commonly quoted reasons to run: “I can eat whatever I want!” But should you? To calculate how much caloric damage running really does, we’ve equated the energy burn* from common race distances with the food you’d need to eat to level off your tank. Not that we recommend popping 793 grapes after a marathon—even though it sounds kind of fun to try!
*Calories based on an average 145-pound woman running at a 10-minute per mile pace with relative comfort.