• xep@discuss.online
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    3 months ago

    What you’ve stated is not a law of thermodynamics. The first law of thermodynamics, which is the one often misused to tell us that calories are the only thing that matter, states that within an isolated system, the total energy of a system is constant. It’s well defined. The human body isn’t an isolated system, and the laws of thermodynamics aren’t tongue in cheek.

    Our bodies don’t burn calories, and you are right in saying that we do indeed eat food, not calories.

    Fasting can, for example, deplete our liver’s glycogen stores, and change the levels of various hormones in our body.

    • AliasAKA@lemmy.world
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      3 months ago

      Sort of. Thermodynamics still definitely plays a role. You cannot have more calories than you ingest, and over time, you cannot perform more work than electrochemically possible; this is true precisely because of the laws described by thermodynamic constraints.

      The laws of thermodynamics aren’t tongue in cheek. The poster saying you can’t escape the laws of thermodynamics I took to mean they’re making a tongue in cheek response; in other words, they’re sort of being witty and saying the reason this finding was observed is because of the fundamental laws governing energy consumption and use in the human body. That absolutely is rhetorically meeting the definition of tongue in cheek.

      • xep@discuss.online
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        3 months ago

        A calorie is a unit of heat energy. We cannot ingest a calorie since it has no rest mass. It is a ridiculous simplification of our biology.

        We have to disagree on the wit of the poster.

        • xxam925@lemmy.zip
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          2 months ago

          lol so what? You can convert it directly to horsepower. All energy is the same. It’s Hess law and work.