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(beingisbeing @ May 26 2008,5:18)</div><div id="QUOTEHEAD">QUOTE</div><div id="QUOTE"><div>
(scientific muscle @ May 26 2008,4:18)</div><div id="QUOTEHEAD">QUOTE</div><div id="QUOTE">What is 'eating clean' and why would have an effect on how much fat you gain?
Excess calories are stored as fat, it doesn't matter if those excess calories are bacon cheeseburgers or organic whole-grain bagels!
The whole 'clean-eating' thing is a stupid myth.</div>
I would like to politely disagree.
You're treating the body as a bomb calorimeter, which it is surely not (even a calorimeter has numerous issues, the physics of which we don't need to get into here).
The body isn't a static furnace, its a complex machine as is oft stated, somewhat annoyingly, that is capable of and in fact engaged in complex metabolic adjustment and adaptation all the time, to say nothing of variegated responses to not only caloric
quantity which only considers energy per unit mass under ideal conditions (ideal conditions which we don't have),
but also macro-nutrient type.
We all know the body prefers to utilize carbohydrates as fuel, yet as weight lifters/bodybuilders we become idiots the second calories are brought up. 9 calories of fat is NOT the same as 9 calories of carb, because the body prefers to do one thing with the former, and another entirely (STORAGE) with the other. (on a standard diet again, cut out one or more macro-nutrients, things change a bit).
Yes it IS calories in vs calories out, but you're being a bit mechanistic and naive if you think the body doesn't adjust its 'calories out' and storage/burning modalities BASED on not only the potential energy of the calories in, but their molecular composition.</div>
Macronutrient disposal during controlled overfeeding with glucose,
fructose, sucrose, or fat in lean and obese women
Regina M McDevitt, Sally D Poppitt, Peter R Murgatroyd, and Andrew M Prentice
ABSTRACT
Background: Previous short-term studies (d6 h) showed differences
in energy expenditure (EE) and macronutrient oxidation in
response to overfeeding with different types of dietary carbohydrate.
This finding could have implications for obesity.
Objective: We used 96-h continuous whole-body calorimetry in
8 lean and 5 obese women to assess metabolic disposal (energy
dissipation and glycogen or fat storage) of a controlled excess of
dietary energy supplied as different carbohydrate sources or as fat.
Design: Five dietary treatments were applied in random order:
energy balance (control) and overfeeding by 50% of energy
requirements with fat (Ofat) or predominantly with glucose, fructose,
or sucrose (Ocho). Macronutrient oxidation rates were
assessed from nonprotein gaseous exchanges. Net macronutrient
balances were calculated as cumulative differences between
intake and oxidation.
Results: Increased EE in response to overfeeding dissipated 7.9%
of the energy excess with a variation in EE of < 1.7% across overfeeding
treatments (NS). EE during the Ofat treatment significantly
exceeded that during the control treatment in the lean but
not in the obese women. There were no significant differences
between lean and obese women in macronutrient oxidation or
balances, so data were pooled. Ocho induced glycogen storage on
day 1 (_100 g) but thereafter progressively stimulated carbohydrate
oxidation so that balance was reached on days 3 and 4. Fat
oxidation was proportionately suppressed. Of the excess carbohydrate,
74% was oxidized; there were no significant differences
between the various Ocho treatments. Ofat stimulated fat oxidation
by 18% and suppressed carbohydrate oxidation. On average, 12%
of the excess energy was stored as glycogen and 88% as fat; there
was no significant difference between overfeeding treatments.
Conclusion: There was no significant difference in fat balance
during controlled overfeeding with fat, fructose, glucose, or
sucrose. Am J Clin Nutr 2000;72:369–77.