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Old 12-01-2012, 12:48 PM   #7
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Originally Posted by panabax View Post
It takes 3500 kcal to burn 1 lb of fat. Stated differently, 1 lb of fat will fuel 3500 kcal worth of activity. Unfortunately, that is thermodynamics. It is a law of nature and it applies to the fat in our bodies. Putting aside the question of a calorie is a calorie is a calorie, once the calorie is stored as fat in our bodies, the only way to get it out is to metabolize it and each lb is worth 3500kcal of work.
Hi panabax,

Thermodynamics won't allow you to create fat from nothing. But metabolizing fat with no increase in activity -- themodynamics has no problem with that. For example your body can up the amount of metabolic heat it is producing.

In general your body can and does drastically increase or decrease its baseline caloric burn rate in response to environmental cues -- like what you eat.

Also the amount of weight one loses as a result of decreasing caloric intake has a strong genetic component. Actually someone (Jeff Volek?) in a recent "low carb cruise" talk on Youtube showed the results from a twin study. This study showed that while different people varied drastically in the amounts of weight they lost in response to less calories in their diets, twins lost similar amounts of weight.


Last edited by NKSL55; 12-01-2012 at 12:50 PM..
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