Race Fuel

Loading up on carbs and fat is proven to work, but only for certain races and with its own side effects. Here's the science on what actually works.

Just in time for summer, a new paper outlines everything an endurance athlete should know to stay safe and race strong in sweltering heat.

Why we know so little (scientifically speaking) about how to eat for ultramarathons.

Loads of factors within and outside the body contribute to nausea during ultramarathons, but there are some ways to mitigate it.

Your speed will determine if and how you need to consume carbs to fuel your half marathon.

Five elite marathoners from around the world detail their pre-race meals and in-race fuel—and their diets are surprisingly similar.

You want to deplete your carb supply to get many of the long run's training benefits. Here's why—and the exception.

You can adapt your body to tap your vast energy reserves of fat through diet and training. Here’s how.

Experts explain why it is worthwhile for runners to focus on fat-burning metabolism and blood sugar management.

Timing carbs and workouts can help build fat-burning ability while still maintaining high-quality training.

Evening races present unique fueling challenges. Use these three tips to step up to the starting line ready to run fast.

What does a typical Kenyan diet look like and why is it effective for fueling runners?