Re:Why thinking hard makes us feel tired
by bluGill on Thursday November 16, 2023 @07:04PM
(#38297445)
The fat in the cells are turned into energy, but generally the cells remain.
Re:Why thinking hard makes us feel tired
by devmor on Thursday November 16, 2023 @10:24PM
(#38299085)
Yes that is true, the water and lipids in the cell are extracted, but the cell stays there until its natural cell death (which can take years).
That doesn't really have anything to do with the conversation though.
Re:Why thinking hard makes us feel tired
by dekhn on Thursday November 16, 2023 @11:40PM
(#38299651)
Do people who burn 3500 calories weigh one pound less? Are you sure?
From what I can tell, weight changes happen only partly due to CO2 exchange and partly due to rates of consumption and excretion.
The biophysical origin (I'm a biophysicist) of weight change as a function of energy use, eating and excretion is a bit more complicated than that.
Re:Why thinking hard makes us feel tired
by mock-possum on Friday November 17, 2023 @03:21AM
(#38300909)
So wait if I fasted for two days, could I responsibly expect to come out the other side one pound lighter? That’d be a roughly 3600 calorie deficit.
Yes.
Re:Why thinking hard makes us feel tired
by insanitybit on Friday November 17, 2023 @08:38AM
(#38303337)
Assuming that they burned purely fat for energy, what else could it be? Are you saying that it's not just fat being burned, or that 'burning' the fat is not going from '1' to '0' in terms of weight?
Give or take, yes.
Like you said, it’s a bit more complicated than that and every body is different. But burning roughly 3500 calories will result in the body weighing roughly 1lb less (accounting for food and water intake and loss).
If it didn’t work this way, every bodybuilder and fitness enthusiast on the planet would have a very different approach to their diet.
When you lose about 3500 calories of energy via this process, you have burned a pound of fat.