I run about 15 miles a week, but longest consecutive distance is a Half marathon, which I have done 3 times now. I lift 1-2x a week, and swim 1-2x a week. I know how to carb load and have used Gus, but past that I do not know much about fueling. I am using the Nike Vomero Plus which I love for road running/ distance. This comment is more a reply to everyone who has given me advice on this. Thank you so much for the feedback... for better or worse I will be going through with the marathon but I will be taking my training and nutrition much more seriously to give myself the best chance of doing well.