I recently appeared on Joe Sell's excellent Marathon Running Podcast for a second time to talk about fueling and nutrition for the marathon (see my first appearance here in case you missed it).
The impetus for this podcast was my recent blog post on how to plan fueling for elite marathoners who have "bottle service" at their race, but in the podcast we talk about fueling for all kinds of runners.
We had a great time and went really in-depth on the science behind optimal fueling (both hydration and sports drinks + gels) for marathoning. Check it out here!