💥 Choose a PN program for FREE—when you join the PN Nutrition Certification for $59/month


💥 Choose a PN program for FREE—when you join the PN Nutrition Certification for $59


Become a Certified Nutrition Coach

  • Join for only $59/month
  • Make a great living helping people transform their health
  • Choose a PN Specialist Program for FREE ($697 value)
Optimize your nutrition for marathons. Yes, send me the free guide.

From macro ratios to nutrient timing to supplements, optimal nutrition can seem overwhelming.

Nutrition for Marathoners is your answer: Use it to achieve your best and unlock greatness.

Meet Precision Nutrition. We’ve worked with the Cleveland Browns, the Seattle Seahawks, the Carolina Panthers, the San Antonio Spurs, the Houston Rockets, the Brooklyn Nets, the Toronto Maple Leafs, the Calgary Flames, and six world champions, including US Open Winner Sloane Stephens and UFC all-time-great Georges St-Pierre. Plus: over 150,000 health, fitness, and nutrition professionals have enrolled in our certification programs, and we’ve provided personal and group coaching to more than 100,000 people looking to eat better, move more, and perform their best.

Why Nutrition Is Crucial
for Marathoners

(According to a Winner of the New York City Marathon)

Whether racing for a personal best or attempting the distance for the first time, it’s nearly impossible to complete 26.2 miles without the right fuel. When you account for all the miles you run during the months of training before the marathon itself, proper nutrition becomes even more critical.

“When I moved off the track, from racing 5,000 m and 10,000 m distances to the marathon, my training required doubling the amount of miles I was accustomed to,” says Shalane Flanagan, a four-time Olympian and the first American woman to win the New York City Marathon in 40 years. “This was the first time I actually realized that my diet and the food I was putting in my body were crucial to getting through this additional training.” 

For Flanagan, that meant not only increasing total calories to account for all the extra miles but also increasing her sources of carbohydrates and especially healthy fats. “I truly believe that changing my diet has enabled me to extend my career,” she says.

Don’t let that happen to you… 


This 100-page nutrition guide is packed with the science, infographics, tools, and expert advice you need to perform your best. 

We know sports nutrition.

Now you’re going to know it, too.

(Click here to get our sports nutrition guides for dozens more sports.)

This guide is completely FREE.

You’re one step away from getting our comprehensive guide to Nutrition for Marathoners.
Simply enter your name and email and we’ll send it over right away.

Our Precision Nutrition Level 1 Nutrition Coaching Certification is trusted worldwide and qualifies for continuing education credits with the following organizations, among others. Learn more about our #1 rated nutrition certification.

ACE Fitness logo, a nutrition continuing education partner ACSM logo, a nutrition continuing education partner NASM logo, a nutrition continuing education partner NBHWC logo, a nutrition continuing education partner CIMSPA logo, a nutrition continuing education partner