Your most recent response was even more entertaining than your first.
You continue to be wrong and clueless.
I am picturing you walking around with a slide rule
as you "measure aerobic and anaerobic energy production".
I guess my advice to you now is, DON'T...think again.
You tried it and it didn't work, it's time to move on.
You said,
"Even your "in-shape" 400m runner will be breathing heavier than normal"
Now you have to define normal, something you may not have a grasp on. An in-shape runner will run within themselves, comfortably under control and will not experience oxygen debt because they are conditioned to handle the task.
That is why you see inexperienced, immature runners doing it all in practice and having nothing for race day.
Smart runners know what time to run their track repeats in and give themselves the proper rest interval between each.
Try not to turn this into rocket science, because you are not up for the challenge. Training and racing can be quite simple and success can be yours if common sense is your constant companion.
When you are regularly in oxygen debt, you are a poor runner and would do well to listen to an experienced coach.