Fred and Chad are twins. They always train together, have the same body composition, and equal anaerobic thresholds.
They both eat the same diet, with an equal number of calories from carbs and fats.
Fred only drinks water during training, while Chad consumes carbs every 30 minutes.
Similar to training, Fred only drinks water during races, while Chad consumes some carbs every 30 minutes.
They compete in a 6hr race on a flat course. There is an aid station every 2 miles with water, a drink that supplies both simple and complex carbs, and energy gels.
Who will win the race? Who has the advantage and why?
(What I’m asking is: are carbs or fats the most efficient fuel for aerobic metabolism?)