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When somebody loses weight, where does the fat go?
131–140 of 241 posts
Re: When somebody loses weight, where does the fat go?
#132Earlier quoted context omitted.
Hehe, true. I once saw a documentary about "big animals" in the past. Like, why did we have giant spiders and insects while they have a rather simple respiratory system that doesn't scale very well. Because: trees! Somehow plants managed to create wood, which bound the C from CO2, but the rest of the biosphere didn't know what to make of the wood. So there were more and more trees and more and more C got removed from…
Do you remember the name of the documentary?
No sorry, this was probably 10 years ago and in German.
Re: When somebody loses weight, where does the fat go?
#133For anyone coming straight to the comments looking for an answer to the question: it turns into CO2 (and a bit of water) and you breathe it out. When you realize that you have to breathe out all the weight you lose, I think it gives you a bigger appreciation for how difficult weight loss can be.
Similarly, when a tree grows, where does most of the mass come from?
a) the soil
b) water
c) the air
d) other
Re: When somebody loses weight, where does the fat go?
#134Earlier quoted context omitted.
I can't help but groan at some of the "obvious" health and weight loss platitudes that get smugly thrown around. " Calories in, calories out! " " You can't outrun a bad diet! " " Weight is lost in the kitchen! " Sure, things ultimately boil down to intake-vs-expenditure. However, it IS more complicated than that in practice . As software developers, we complain when management makes decisions based on inadequate or p…
Those platitudes are also, well... Wrong. My favorite example: > "Calories in, calories out!" Well, sure, but those calories on the label are calculated by burning the components in a machine and measuring the heat output. The human body isn't going to convert the input food at 100%. That percent is going to depend on a lot of factors!
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Re: When somebody loses weight, where does the fat go?
#135Earlier quoted context omitted.
Exercise makes more sense! Breathing hard == losing weight!
From the paper "Replacing one hour of rest with exercise that raises the metabolic rate to seven times that of resting by, for example, jogging, removes an additional 39 g of carbon from the body, raising the total by about 20% to 240 g. For comparison, a single 100 g muffin represents about 20% of an average person’s total daily energy requirement. Physical activity as a weight loss strategy is, therefore, easily fo…
That quote is deceptive. An hour's jogging will burn at least 500 calories even for quite small people going quite slow, perhaps 700-800 for larger or faster ones. That would be a massive muffin and significantly more than 20% of an average calorie consumption.
Re: When somebody loses weight, where does the fat go?
#136For anyone coming straight to the comments looking for an answer to the question: it turns into CO2 (and a bit of water) and you breathe it out. When you realize that you have to breathe out all the weight you lose, I think it gives you a bigger appreciation for how difficult weight loss can be.
I've lost 16kg this year, which I attribute to 3 things: 1. being fairly strict with calorie intake - though I have gone over my limit a whole bunch of times 2. upping my running game - 80km+ most months 3. being diagnosed asthmatic (after 40 years of merely "you've got shitty lungs, sorry") and prescribed a morning+night inhaler Dieting isn't new to me, I've been a fat bastard all my adult life. Previous attempts at…
asthmatic - how did you get it diagnosed after 40 years? just wondering, pure coincidence ?
Re: When somebody loses weight, where does the fat go?
#137Earlier quoted context omitted.
Hehe, true. I once saw a documentary about "big animals" in the past. Like, why did we have giant spiders and insects while they have a rather simple respiratory system that doesn't scale very well. Because: trees! Somehow plants managed to create wood, which bound the C from CO2, but the rest of the biosphere didn't know what to make of the wood. So there were more and more trees and more and more C got removed from…
That is very interesting. Is it related to coal? Will the trees today nor form coal because they will be processed by fungi?
> That is very interesting. Is it related to coal? Will the trees today nor form coal because they will be processed by fungi?
No, coal has formed after fungi found how to break down lignin (lignite is usually "young" coal, having generally formed between the disparition and the dinosaurs and modern day, generally speaking the better the coal the older it is as coal is a metamorphic process, so given similar conditions time is the factor for the rock going through the grades), lignin isn't the only organic component even in carboniferous coals, and these coals have lignin-rich and lignin-poor epochs and locations. And peat lands exist today which perform the first "step" of coal formation.
The trees today are unlikely to form coal because that first requires quickly putting the trees in anoxic conditions (e.g. acidic waters or low-permeability soils) over a sufficiently long time that good-sized layers can build up, then shifting those layers way down so they can be converted by heat and pressure over millions of years.
Carboniferous had lots of low-lying forested wetlands and swamps which provided the vegetable matter in anoxic conditions, and the subduction zones of the forming pangea proceeded to shove much of it under (when both happened in the same place), that is why it's the source of so much coal.
But few of our peatlands are in subduction zones, and even if they were it's unlikely we'd give them the time to accumulate and slide down for processing.
Re: When somebody loses weight, where does the fat go?
#138Earlier quoted context omitted.
No it means not eating is more environmentally friendly.
The food you eat will turn to CO2 one way or another. If you let your food become fat rather than CO2, that fat will eventually turn into CO2 after you die.
Seal yourself in concrete after you die -- for the environment.
Re: When somebody loses weight, where does the fat go?
#139Earlier quoted context omitted.
I'd suspect the more exercise you do the more that number moves up, you'd be breathing harder. I'd hesitate to try and put a 'hard limit' on anything like this.
It's pretty difficult to double that number. Can you really double your metabolism without ill effect? Or without massively changing your lifestyle? The normal expectation is maybe 10-25% change. Any more than than would require things likes 8 hours of exercise per day.
Losing eight pounds during 3-4 hours run (marathon event) is not unheard of: http://www.letsrun.com/forum/flat_read.php?thread=3319287
Re: When somebody loses weight, where does the fat go?
#140Earlier quoted context omitted.
I'd suspect the more exercise you do the more that number moves up, you'd be breathing harder. I'd hesitate to try and put a 'hard limit' on anything like this.
It's pretty difficult to double that number. Can you really double your metabolism without ill effect? Or without massively changing your lifestyle? The normal expectation is maybe 10-25% change. Any more than than would require things likes 8 hours of exercise per day.
5-6000 Calories is normal for an 8 work hour shift at -10c.