when is body fat burned

[ademyster]

Just a quick question for the more scientific members, I am trying to find out if there is a specific time in relation to eating patterns/sleep ect that the body dips into fat stores and when does the body shift between lipogenesis and lipolysis? For example will a large meal stop lipolysis altogether or does it continue at a reduced rate. I know weight gain or loss is a result of calories in or out across a week or so but is it gained/lost in real time or is there a delay (long post sorry)

[WonderPug]

when is body fat burned

Constantly. Turnover of adipose tissues is rapid, even when gaining significant amounts of adipose tissue.

That said, I think you're conflating net efflux with simply efflux.

[ademyster]

Constantly. Turnover of adipose tissues is rapid, even when gaining significant amounts of adipose tissue.

That said, I think you're conflating net efflux with simply efflux.

Thank you for your response, so basically Your always creating and burning fat but the rates change depending on various parameters such as fasting, feeding or exercising? Thanks again

[braggable]

Constantly. Turnover of adipose tissues is rapid, even when gaining significant amounts of adipose tissue.

That said, I think you're conflating net efflux with simply efflux.

Your use of the word 'conflate' is as arbitrarily over-generalizing as it is pompous in its use on this board. The same can be said about 99% of your posts, including this one.

[WonderPug]

Thank you for your response, so basically Your always creating and burning fat but the rates change depending on various parameters such as fasting, feeding or exercising? Thanks again

Exactly.

Think of a stable state (no net change in adiposity) as de novo lipogenesis (DNL) + re-esterification (RE) = lipolysis (L).

DNL + RE > L = net fat influx
DNL + RE < L = net fat efflux

But none of the three states imply L = 0. The same is true for DNL and RE.

[InItForFitness]

What is your point?

Likely that, at some point in his experience on this forum, he made some illogical/BRO-tastic post in regards to the topic of nutrition and was corrected by WonderPug with the facts of it.

This clearly upset him and he now feels the need to grudgingly attack WP's posts.










He's probably not gun make it brah.

[braggable]

What is your point?

My point is simple, as it would be to anyone who reads it with the faintest understanding of the English vernacular.

[KrypronSteve]

I'm not sure when fat burning turns on and off relative to when you eat certain kinds of meals, but it seems to me your body has only a few options for fuel. So your body can use your triglycerides as energy (which is the form of stored fat in the body, but these are also present in the blood, though also blood sugar/glycogen (from carbohydrates) and amino acids (from proteins, to be used either to be stored as muscle or converted to glucose to serve as an energy source). Maybe this is too simplified, but I think of it as this - when your body is running low on blood sugar/glycogen, then your body will use its other "gas tanks" in the form of triglycerides and/or amino acids--> glucose. When your blood levels drop, then your body will free more triglycerides into your blood to use for energy.

So the simple, short answer is your body is acting to maintain a certain level of blood levels of glycogen, amino acids, and fatty acids, each of which can be used for energy though dependent on how much of each is available in the body (and once your deplete glycogen, you would need to ingest carbs to replace it, but your body can break down muscle and/or fat to get more energy from your stored muscle and/or fat. So if you want to burn stored fat, then you have to have a calorie deficit. It will be burned whenever you happen to need the energy and there is no other energy source freely available from the food you have eaten.

[braggable]

Likely that, at some point in his experience on this forum, he made some illogical/BRO-tastic post in regards to the topic of nutrition and was corrected by WonderPug with the facts of it.

This clearly upset him and he now feels the need to grudgingly attack WP's posts.










He's probably not gun make it brah.

Ironically, my experience on this forum is WonderPug's blatant overuse of posting studies he clearly does not have the background in comprehending, let alone use as validation of points made.

[InItForFitness]

My point is simple, as it would be to anyone who reads it with the faintest understanding of the English vernacular.

Have you considered any form of professional treatment for this deep seeded anger you hold?

Something tells me it stems from more than your interactions in the forum, however you've carried it over to this aspect of your life because on the internet you can be whoever you want to be...which has caused you to adopt this persona you put fourth ITT.

Ironically, my experience on this forum is WonderPug's blatant overuse of posting studies he clearly does not have the background in comprehending, let alone use as validation of points made.

Please see my post above ^^^

[ademyster]

Exactly.

Think of a stable state (no net change in adiposity) as de novo lipogenesis (DNL) + re-esterification (RE) = lipolysis (L).

DNL + RE > L = fat influx
DNL + RE < L = fat efflux

But none of the three states imply L = 0. The same is true for DNL and RE.

thank you

[ademyster]

I'm not sure when fat burning turns on and off relative to when you eat certain kinds of meals, but it seems to me your body has only a few options for fuel. So your body can use your triglycerides as energy (which is the form of stored fat in the body, but these are also present in the blood, though also blood sugar/glycogen (from carbohydrates) and amino acids (from proteins, to be used either to be stored as muscle or converted to glucose to serve as an energy source). Maybe this is too simplified, but I think of it as this - when your body is running low on blood sugar/glycogen, then your body will use its other "gas tanks" in the form of triglycerides and/or amino acids--> glucose. When your blood levels drop, then your body will free more triglycerides into your blood to use for energy.

So the simple, short answer is your body is acting to maintain a certain level of blood levels of glycogen, amino acids, and fatty acids, each of which can be used for energy though dependent on how much of each is available in the body (and once your deplete glycogen, you would need to ingest carbs to replace it, but your body can break down muscle and/or fat to get more energy from your stored muscle and/or fat. So if you want to burn stored fat, then you have to have a calorie deficit. It will be burned whenever you happen to need the energy and there is no other energy source freely available from the food you have eaten.

Thank you for your response

[WonderPug]

I'm not sure when fat burning turns on and off relative to when you eat certain kinds of meals, but it seems to me your body has only a few options for fuel. So your body can use your triglycerides as energy (which is the form of stored fat in the body, but these are also present in the blood, though also blood sugar/glycogen (from carbohydrates) and amino acids (from proteins, to be used either to be stored as muscle or converted to glucose to serve as an energy source). Maybe this is too simplified, but I think of it as this - when your body is running low on blood sugar/glycogen, then your body will use its other "gas tanks" in the form of triglycerides and/or amino acids--> glucose. When your blood levels drop, then your body will free more triglycerides into your blood to use for energy.

So the simple, short answer is your body is acting to maintain a certain level of blood levels of glycogen, amino acids, and fatty acids, each of which can be used for energy though dependent on how much of each is available in the body (and once your deplete glycogen, you would need to ingest carbs to replace it, but your body can break down muscle and/or fat to get more energy from your stored muscle and/or fat. So if you want to burn stored fat, then you have to have a calorie deficit. It will be burned whenever you happen to need the energy and there is no other energy source freely available from the food you have eaten.

It's not only overly simplified, it's also simply wrong.

You're implying specific energy substrate circulation and utilization is binary or at least mutually exclusive. It is not. Relative utilization and serum levels vary, but they're never zero.

[KrypronSteve]

It's not only overly simplified, it's also simply wrong.

You're implying specific energy substrate circulation and utilization is binary or at least mutually exclusive. It is not. Relative utilization and serum levels vary, but they're never zero.

OK fine, thanks man. I was hoping to at least make the analogy that your body has more than one fuel source and you at least need to have a deficit before you'd start tapping your reserve fat/muscle...

[VmissileX]

welp, this topic is more than enough science for me one day.


Jeez...you guys are on another smart level then me.


and its friday afternoon too guys...i'm here sitting tryin to understand WP's posts and i feel i burned enough calories just trying to compromise.

[nicholina]

Constantly. Turnover of adipose tissues is rapid, even when gaining significant amounts of adipose tissue.

That said, I think you're conflating net efflux with simply efflux.

This was going to be my response. Constant efflux

[nicholina]

OK fine, thanks man. I was hoping to at least make the analogy that your body has more than one fuel source and you at least need to have a deficit before you'd start tapping your reserve fat/muscle...

Thats just not correct though

[KrypronSteve]

Thats just not correct though

So you can have a net loss of fat and/or LBM while not on a deficit then?

[nicholina]

you at least need to have a deficit before you'd start tapping your reserve fat/muscle...

This is what you said. Implying that before fat is ever used or active, there needs to be a "deficit" or a "running out of energy" as you put it. As if fat tissue were inert or metabolically inactive up until that point. which is incorrect.

[KrypronSteve]

By tapping, I'm talking for a net loss of body fat...