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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

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.

xhrpost 4y ago
IIRC, a gallon of gasoline is about 37,000 calories. So that's a lot of energy he utilized, all through his body burning fat and carbs!
WastingMyTime89 4y ago
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.
cfj 4y ago
That seems way too high. A rough ballpark of energy expenditure while running is 1000 kcal per hour. Strava has the activity at 16,751 kcal.
- darkwizard42 4y ago
  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.
  - Majestic121 4y ago
    I don't know about that, it's probably not super precise but an hour running is 600-700 kcal burned, reported by Garmin Connect
  - mikestew 4y ago
    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.
deleted 4y ago
[deleted]
mikestew 4y ago
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.

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.

xhrpost 4y ago

IIRC, a gallon of gasoline is about 37,000 calories. So that's a lot of energy he utilized, all through his body burning fat and carbs!

WastingMyTime89 4y ago

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.

cfj 4y ago

That seems way too high. A rough ballpark of energy expenditure while running is 1000 kcal per hour. Strava has the activity at 16,751 kcal.

darkwizard42 4y ago
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.
- Majestic121 4y ago
  I don't know about that, it's probably not super precise but an hour running is 600-700 kcal burned, reported by Garmin Connect
- mikestew 4y ago
  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.

deleted 4y ago

[deleted]

mikestew 4y ago

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.