How does your body burn 2000 calories a day, but you have to run a mile to burn 100 extra?


Basically the title. I saw this thing about how much you have to exercise to burn off certain foods and was wondering how your body burns so many calories by doing nothing.

In: 160

Your body is always burning calories to run its basic functions – keep your organs doing their job, keep your body warm, etc. If you think about it, running a mile takes like 8-10 minutes and that burns an extra 5% over your entire day’s baseline. If you jogged for an hour, you’d burn 600-700 calories.

Your body is never doing “nothing”

You have a “basal metabolic rate” whish is the required calories to just function.

Body functions, breathing, liver, kidney, brain, heart etc – all require energy.

That’s about as much as I understand it!

2000 (ish) calories is just what you need for doing the normal stuff you do day to day. The amount of energy you burn just existing and walking around and making poop and thinking and whatnot. The body is a very inefficent machine when you think about it.

Muscles on the other hand are pretty efficient at using the juice you make… It takes a pile of movement to use it up.

Well, it is not doing nothing. We are warm blooded animals, and the body gives off about 100 W to keep us warm. That comes from different activities needed to keep us alive (breathing, digesting) but also from the the brain: your brain uses a large amount of glucose, about 1/5 of your daily calories.

The surprising part is the muscles are so efficient. But they need to be. If moving for hunting or gathering food needed much more energy we would have gone extinct a long time ago.

Your body burns calories just being alive and doing normal stuff. Kind of like how a car will burn gas while idling and not moving.