I think the opposite. People that fast for a period (> 16 hours) report improved energy levels. This may be because after a while the body enters a ketogenic state where it burns body fat, which is a great source of energy and perfect for when on the hunt.

> I think the opposite. People that fast for a period (> 16 hours) report improved energy levels. This may be because after a while the body enters a ketogenic state where it burns body fat, which is a great source of energy and perfect for when on the hunt.

Ketogenesis requires over a week of carb restriction IIRC. I think fasting yields energy because the body increases various stress hormones to push you to find food so you don't starve.

No, it has to do with insulin levels. Google "Jason Fung insulin".

Depending on food type it can easily take over 2 days to digest food. https://www.mayoclinic.org/digestive-system/expert-answers/f...

Have you ever tried fasting? One of the biggest issue while fasting is too much energy and difficulty to fall asleep.

Have you ever tried to focus on a hard problem at work after a big lunch?

That is why you hunt when you are "out of fuel": you can try to hunt just after you eat, but when you fail you get to try again while "out of fuel". (Out of fuel in quotes - presumably the body has enough energy stores for a few more hunts even when it didn't find anything to eat the day before.)

My comment was definitely taken out of context, I didn't mean to eat and run out the door. The intent was you need to be well fueled and not depleted.