How often should I drink water or eat while running the marathon?

How often should I drink water or eat while running the marathon?

I don't think that you should pass any water stop without taking one swallow of water. You don't need to drink the whole cup. As long as you start prop rehydrated, just grabbing a cup along the way, drink what you can out of it. It should be sufficient. But, don't wait until you feel thirsty, it is too late. The alarm has gone off. So, be proactive, take a swallow of water at each water station, and it should be sufficient to get you through the race. And, don't be afraid to take electrolytes during a race. Water stations are established at a marathon at the discretion of a race itself. Most of the important marathons around the Country and the World have a water stop every mile. If they don't, it is usually every other mile.