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How many calories on a low carb diet?
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<blockquote data-quote="borofergie" data-source="post: 313946" data-attributes="member: 33342"><p>You want be to provide references that "the first law of thermodynamics" applies and that the principal mode of energy storage in humans is fat? :shock: I'm stating the conventional position. If you have some alternative theory you should probably write it down...</p><p></p><p>The First Law of Thermodynamics applies to ALL systems. How is that "kite flying"?</p><p></p><p>Give me one example of ANY system for which the first law doesn't apply and I'll take you seriously (and also applaud the Nobel prize that you'll pick soon afterwards).</p><p></p><p></p><p></p><p>Fat is just is the storage of chemical energy. An increase in stored chemical energy is associated with an increase in weight of the system. So of course the First Law of Thermodynamics applies. </p><p></p><p></p><p></p><p>The Second Law of Thermodynamics states that it is impossibe conversion from one form of energy to another with 100% efficiency. When you convert chemical energy "fat" or "glucose" to kinetic energy and thermal energy during exercise, energy is lost through heat rejection. To fuel 3500kcal of exercise you need to burn more than a pound of fat.</p><p></p><p>If you're going to have a dig at the First and Second laws, it would be a pity not to take on the Zeroth law while you're at it. </p><p></p><p></p><p></p><p>You haven't looked then. It's standard practice to measure the losses included in urine, feces, heat rejection and even sweat, at facilites like this one: <a href="http://www.uow.edu.au/health/healthsciences/smartfoods/wholeroomcalorimeter/index.html" target="_blank">http://www.uow.edu.au/health/healthscie ... index.html</a></p><p></p><p>Here is one example: <a href="http://www.ncbi.nlm.nih.gov/pubmed/3604965" target="_blank">http://www.ncbi.nlm.nih.gov/pubmed/3604965</a></p><p>But obviously there are hundreds.</p><p></p><p>In fact Atwater used bomb calorimeters to manage the energy content of feces and urine in order to calculate the effective calorific values of macronutrients.</p></blockquote><p></p>
[QUOTE="borofergie, post: 313946, member: 33342"] You want be to provide references that "the first law of thermodynamics" applies and that the principal mode of energy storage in humans is fat? :shock: I'm stating the conventional position. If you have some alternative theory you should probably write it down... The First Law of Thermodynamics applies to ALL systems. How is that "kite flying"? Give me one example of ANY system for which the first law doesn't apply and I'll take you seriously (and also applaud the Nobel prize that you'll pick soon afterwards). Fat is just is the storage of chemical energy. An increase in stored chemical energy is associated with an increase in weight of the system. So of course the First Law of Thermodynamics applies. The Second Law of Thermodynamics states that it is impossibe conversion from one form of energy to another with 100% efficiency. When you convert chemical energy "fat" or "glucose" to kinetic energy and thermal energy during exercise, energy is lost through heat rejection. To fuel 3500kcal of exercise you need to burn more than a pound of fat. If you're going to have a dig at the First and Second laws, it would be a pity not to take on the Zeroth law while you're at it. You haven't looked then. It's standard practice to measure the losses included in urine, feces, heat rejection and even sweat, at facilites like this one: [url=http://www.uow.edu.au/health/healthsciences/smartfoods/wholeroomcalorimeter/index.html]http://www.uow.edu.au/health/healthscie ... index.html[/url] Here is one example: [url=http://www.ncbi.nlm.nih.gov/pubmed/3604965]http://www.ncbi.nlm.nih.gov/pubmed/3604965[/url] But obviously there are hundreds. In fact Atwater used bomb calorimeters to manage the energy content of feces and urine in order to calculate the effective calorific values of macronutrients. [/QUOTE]
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