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Message: <blockquote data-quote="borofergie" data-source="post: 313816" data-attributes="member: 33342">Hmmmm, not sure I agree. Human bodies store excess energy as fat (the capacity for glucose storage as glycogen is very small). One lb of fat contains about 3500kcal. If you eat more 3500kcal more than your burn in a given time period, then you'll put on about a pound of fat (plus some water weight). But your shed can only store big vats of pig fat (actually it can store a small pile of sugar cubes too, but compared to the pig fat vats, these store a trivial amount of energy).Your body contains less than 5000kcal of glucose (in your liver, blood and muscles). 5000kcal = 1.2kg of glucose in total. So if you emptied your glucose tank then you'd only lose about 2.5lbs total.I agree. His point, and my point is that the First Law is statement of fact, but it doesn't tell you anything about what is regulating the "energy in" (appetite) and "energy out" (exercise). The first law just tells us that we will put on weight if we eat more than we burn. It doesn't tell us why we put on weight.</blockquote>

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