Webcompleting a marathon is a feat of strength, endurance, and stamina, and proper hydration, nutrition, and training are vital to a runner’s success and survival. Webhere’s how to fuel before, during, and after your marathon. “in the marathon build, it can be easy to underfuel, which can increase your risk of injury,” says taylor. Webdiscover the essential nutrition tips for runners in our comprehensive guide. Learn how to optimize your health and nutrition for peak performance.