Part of getting ready for a big run involves eating right. To have enough energy and not be weighed down, runners should think about their general type of diet. It might be a change in the norm, but if it’s too much of a departure, it could seem overwhelming. This is all a good reason to work with a professional nutritionist to develop a good plan.
Determining the right diet can only be one part of the plan. New runners may have to think about snacks and casual foods as well. There’s a relationship between your general weight and the way you may feel in the midst of race, too.
In the end, racing nutrition is probably best done in context with other improvement measures.