Avoiding a DNF in Your Next Ultra: Tips and Strategies

To successfully DNF your next ultra, consume fewer calories than recommended, skip pre-run fuel, skip meals, and avoid hydration. However, these practices can increase injury risk, decrease performance, and lead to serious health consequences. It's best to create an endurance fueling plan based on your body frame size, the goal race, and the terrain, and to get help from a sports dietitian if needed. Regular fluid loss testing combined with sodium sweat concentration testing is recommended to figure out your own hydration requirements.