Quote: (01-13-2016 01:07 AM)Uncircumcised Coke Can Wrote:
Hades,
You can't store fat in a caloric deficit. Period.
Muscle and fat are both a form of energy "storage", and neither can happen without caloric surplus. We're going up against thermodynamics again here...
Now, if you're arguing that a "sugary" caloric deficit might lead to LESS fat loss than a "low carb" caloric deficit --- then maybe. It's still a trifle compared to caloric intake.
Coke Can, at first I thought you were trolling the thread but it seems that you are here for the actual discussion.
The first law of thermodynamics states that energy cannot be created or destroyed, thus:
calories in = body function + tissue regeneration + muscle mass + fat mass
Think of the first two terms as work being done by your body. Indeed, your body requires energy to keep warm, to digest food, to synthesize hormones, neurotransmitters, blood cells, to regenerate tissue...
The last two terms can be thought of as "energy storage".
It is your hormones who decide whether an ingested cal is spend on doing work or on storage, and in which form of storage.
Take a hypothetical person who is in perfect equilibrium at an intake of 2000 kcal/day.
These can be split as: 500+500+500+500.
Now if this person starts injecting test and GH, this can become: 450+500+650+400. Still 2000 kcal/day, but this person is gaining muscle, losing fat and gaining total body mass since his body spends less energy manufacturing hormones.
Let's place our theoretical test subject in a calorie deficit of 400 kcal/day.
He can swing to 1600 = 450+450+350+350.
If he is insulin insensitive and has low test and growth hormone, he will rather swing to 1600 = 400+400+300+500, thus he is losing muscle while he doesn't lose any fat.
If he gets hormonally screwed even more, he can become 1600 = 400+400+100+700, he is gaining fat mass.
As you see, in theory, the first law can also predict that you gain total mass while in a caloric deficit due to severe downregulation of the normal bodily functions. However, your body is not that stupid and will probably use all energy storage before using vital functions.
So if you want to argue that your total bodyweight will not go up when in caloric deficit, I think your statement is fairly accurate, although it is not an illustration of the first law of thermodynamics which allows the opposite.
If you state that your total fat mass cannot go up when in caloric deficit, I disagree.