I've been trying to figure out how much fat I burn for fuel daily so I can calculate whether I am eating more fat than I am burning. The scale IS moving down, albeit slowly, and I HAVE seen a definite sparing of lean muscle tissue going from low carb/moderate fat/high protein to low carb/moderate protein/high fat. This is SO counter-intuitive if you don't understand the mechanisms involved, but it's working!
My question is, has anyone done the math on how much fat in grams they are actually burning daily?
By my calculations, it is something like 87.5% adipose fat during post-absorptive rest and actually :decreases: a little with activity (though calories burned goes UP, so net fat burned also goes UP, it's just the percentage of calories that are adipose fat burned that go down).
This means if I burn, say, an average of 95 calories an hour (basically my TDEE average), 83 of those calories (9 grams) on average is FAT. Now, not including the 4 hours times 3 meals of eating and digestion (12 hours) this leaves 12 hours for almost pure fat-burning time. 12 hours times 9 grams = 108g of fat burned (This is LESS than what I am eating daily yet the scale is still going down).
Here's the biggest question I have for you folks -- Are we STILL burning fat DURING the 4 hour windows directly after eating a meal when we are eating low carb/moderate protein/high fat?
Is it slowed down or stopped by the insulin and/or glucagon response to the protein & carbs?
Does anyone have a scientific reference or even some technical knowledge on this?
I am assuming that if people ARE in fact eating similarly to me (stats and diet below) and STILL losing FAT, that they MUST be burning more than they are eating, right? And this means logically, that we MUST be still burning fat in those hours after a meal (unlike what happens when you eat a high carb meal - insulin inhibits lipolysis and FFA uptake for approximately 4 hours while it's burning carbs, making protein, and storing fat). RIGHT?
Trying to wrap my brain around this one, but am really coming up short in the "How the hell is it possible that I am losing more fat than I am eating daily?" category :)
______________ STATS & DIET ___________________
Here are my current stats and diet:
I am 40 years old, male, 155lbs, 5'9", with about 15-16% bodyfat (average of multiple Accu-Measure bodyfat caliper readings). Skinny-fat and not very active (light exercise level of BMR/TDEE calculations).
I'm currently eating about 1900kcals with 70-80g of protein, 60g carbs, and the rest (142-149g) of fat. I have been fat-adapted for about 3 or 4 days (no more blatant carb/keto flu symptoms) and feel pretty good overall. Hands and feet are much warmer than usual for longer periods of time (used to have extremely cold extremities for long periods of time on high carb diet -- now it's only so often).
My monounsaturated fats (MUFAs) are comprised mainly of extra virgin olive oil and peanut butter (All-Natural Smuckers - only ingredient is peanuts and minute amounts of salt) comprising about 68g daily.
My polyunsaturated fats (PUFAs) mainly come from those same sources plus milled flaxseed (WildRoots variety) and salad greens comprising about 44g daily.
My saturated fats come mainly from bacon, eggs, and top sirloin comprising about 30g daily.
asked byEric_30 (98)
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on March 03, 2013
at 08:09 PM
I stopped reading at "this is so counter-intuitive if you understand the mechanisms involved"