Someone on Twitter calculated about 55,000 calories burned. Not sure if he had things to consume while running - but 8 - 10 lbs of fat burned in one day is wild to think about.
Dang, that would be SO impressive... <1000 calories an hour would mean he is running SUPER efficiently from a body perspective, but of course, with the right hydration, nutrition, and temperature it is all possible to burn less calories.
Whether you walk it or run it, a mile is about 100 calories. So, give or take, ~20,000 calories. Divide by 3500 calories/lb. and he burned five pounds of fat he probably didn't have to spare. But not so fast, he was also consuming calories along the way, and consuming a lot.
So calculating the net burn would be quite difficult. But the gross burn was probably about five pounds/2.25Kg.
Definitely had things to consume. I don’t think you could go through this kind of effort on your energy storage only. I don’t think it can be mobilised that fast. Hydratation probably is a major concern too.
Not sure if he had things to consume while running
Oh, he had things to consume. I ran 16 miles on hilly terrain on Saturday, and just for that I brought about 500 calories with me (not all consumed, some was "just in case").
It has been said that your liver stores about 2000 calories of glycogen. Divide by ~100 calories/mile, and now you know why marathoners hit "the wall" at about 20 miles if they don't chomp on some calories along the way.
