Assuming I eat exactly my TDEE everyday, on day I have a big meal and consume an extra 200 calories over my TDEE. How long do I have to create a calorie defecit of 200 calories before they’re stored as fat by my body?
In: 672
Pretty quickly.
It takes around 30-40 minutes for your first bites to go from mouth to bloodstream, the bigger the meal the longer this input will take. There’s a very short period in which your body will pump this active energy around before it gets stored.
If you want to work out and build muscle mass and burn body fat, what you want to do is flood your body with protein and a bit of carbs before you start, then go HAM for a while.
According to a 2012 study at Oxford University, it can take as little as four hours for excess calories to be converted into fat.
The first thousand-ish calories are converted into glycogen, which gets broken down for energy over time. If you eat more than that in one sitting, or if you eat when your glycogen stores are already full, the excess calories get converted into fat.
I’m sure someone else will explain it better, but, In essence (at least as I understand it), The body doesn’t really process food on a 24hour schedule. We call it TDEE but it’s more of a convenience for us to measure on the daily than trying to measure second by second or minute by minute.
When you eat it takes 30-45~ minutes before the bodys processing of that food has gone far enough to begin extracting nutrients from it. From there, it’s 4-7~ hours before the majority of the meals contents are processed, and in total about 35~ hours to reach the uhm, other end.
Presuming you eat TDEE+200 in one sitting and you hypothetically finish the meal instantly, you’d be converting roughly half of the calories into fat because your body just doesn’t need that much energy in one go.
Now; With that said, The way fat cells work is a bit different from how people think; A basic TL;DR is that the fat cells act like a warehouse of energy. When a warehouse gets full, a new fat cell is made, Rinse, repeat as needed until the incoming energy stores from food are exhausted.. And your body won’t just get rid of empty warehouses, they’ll get reused.When you’re not taking in calories, your body burns through it’s stores of readily useful energy, then begins processing fat after that.
So doing exactly your TDEE in one sitting would result in your simple energy stores being filled, then the fat cells being filled with the excess, any extras needed being made, and then your body burns through the energy it has, and burns through those stored energies in the fat warehouse too, putting you back at square one. (Side note, This “simple first, fats later” ordering is essentially why intermittent fasting can be effective; You force your body to empty it’s simple stores and then it MUST process energy from fats because you’re not taking in anything new for an extended period)
TDEE+200 is the same thing except 200 extra calories will get stored; It may result in an extra fat cell or two, but essentially if you then eat -200 the next day, you’re back to square one possibly with a little more warehouse storage, so to speak.
In all practicality, You can’t really stop your body from storing excess energy in fat, That’s just what it’s ‘designed’ to do. If your goal is to minimize your body’s need to store energy in fat, you’d need to be eating many smaller meals throughout the day that sum up to the same TDEE, so that you’re not dumping more fuel on the fire than is needed to keep it going. But to completely stop your body from converting any excess energy to fat you’d need perfect knowledge of your bodies simple energy stores to be able to eat exactly what would fill those and not a calorie more.
At least that’s how I understand it all, in essence.
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What will happen if I eat TDEE + 10000. Will everything be converted to fat or is it too much and it will just pass and do nothing.
And how much kcal we can convert to fat per day ?
1kg of fat contains 7700 calories.
If you use a stair machine for 1 hour and you weigh 90kg, you will burn 800 Calories.
So about 9.5 hours of work on a stair master to burn 1kg of fat.
Note: Your body converts the fat to sugar to use but it only does that when your sugar has been low for long enough (at leat 4 days), that your body chemisty has changed to convert fat.
Never try to do this all at once. Sudden sugar loss is dangerous. Too much exercise too suddenly is dangerous.
How does reddit know I ate a half gallon of ice cream last night?
None of this timing stuff really matters. Over a long time what will be left in your body will be based on the calories you’ve eaten minus the calories you burn through metabolism or exercise. If you take in more than you burn it will be stored. If you burn more than you take in the stored energy will be consumed.
Follow up question: Is there a limit for how much can be converted to fat at one point?
Say I eat a 20,000 Calorie meal, does EVERY, SINGLE, ONE of those 20,000 calories get converted to energy/fat?
Or after a while, does your body give up and just purge the rest?
The question has a sibling question which is how quickly and often does the body convert stored fat into energy? It’s a constant in and out process
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