About nonmagical energy turning into magical energy: Why is that different from nonheat energy turning into heat energy, or any other energy conversions? And why is it different from magical energy turning into nonmagical energy (like zombies turning cranks/throwing stuff/etc, or fireballs creating light and heat, etc)? What is it that separates magical and nonmagical energy, anyways?
You are aware that the implication is that all magicians have a "Magic Organ" that converts the bodies calories into magic right?
No, I am unaware of any such implication. Even assuming that requires the inbuilt assumption of magic being inherently distinct from nonmagic.
What generally seperates magical and nonmagical energy is the protean nature of magic.
But still you cannot rub two sticks together and get magic, you need an intermediary.
Which ultimately you COULD keep inventing reasons why doing push ups makes magic, or you could simply have a system where people ritually call upon magic to cast spells (aka the mana system)
1. Where did the push-ups thing come from? The idea of magicians using their own energy is
in no way incompatible with rituals and the like.2. ATP doesn't just power muscles. Stop being a scientific illiterate and read one of the times I've said that earlier in this thread.
3. Magicians powering magic with, say, their body heat or something makes about as much sense as any other kind of magic.