[JackMorgan]

One thing that I almost never see counted in studies of weight loss is the energy acquired from breathing.

We extract out oxygen from the air constantly. I tried to guestimate it once and came up with the rough number that it's possible as much as half of our total energy comes from the air.

So it's not always a violation of the laws of physics, but rather an equation where we're only counting half the variables.

[indoordin0saur]

Maybe you're trolling. But if not, ask yourself what is the oxygen reacting with?

[IAmBroom]

Um, no. We require oxygen to release the electrons that our cells use to do work (ATP + oxygen = free electrons + waste products), but no one generates calories of energy from breathing without food.

That has been tested for thousands of years, and it's technically called "starving to death".

If you're suggesting the opposite - oxygen restriction - that is called "suffocating to death", and again, probably isn't an optimal weight loss plan.

[tekla]

https://www.theguardian.com/uk/1999/sep/22/gerardseenan1