Marathon Day in New York City is almost here. After months of training, the light is at the end of the tunnel. Here, in our last article in this series, we look to our friends (who know much, much more about running marathons than we do) for their sound advice.
During the long runs we've been doing to train for the upcoming marathon, we've had some time to think. It made us wonder: Why is a marathon the distance that it is? Here's how it happened, and why it's remained that long.
Training for my first marathon has produced a few questions, like these: What's in those little gel packs that serious runners swear by? And do we need them? Here we look into the beloved "goo" packs, and seek to understand how they're going to keep us going through five hours of running. 
A new study in the American Journal of Kidney Disease shows that acute damage to the organ can occur in marathon runners, of which there are more than 500,000 in the United States. But how significant is this work? Let's take a look.
The World Marathon Challenge of 7 marathons on 7 continents in 7 days is about to get underway. Are such extreme endurance sports healthy? Worth the risks?