The body stores about 1800 calories of glycogen, give or take. When marathoners hit "the wall" after 15-20 or so miles they have mostly depleted these stores and are having trouble adjusting to burning fat.
If I train in nutritional ketosis, theoretically my body will be used to using fat as a fuel already, right? So then shouldn't I be able to run a marathon without hitting the wall?
I've run 3 marathons in the past eating lots of carbs during training and I'm gearing up for another. Have any experience marathoners played with this?
I know that marathons can be run on a paleo diet just from other PH threads. What I'm asking here is, could it actually advantageous to train in ketosis?