RE: Why can I run really fast sometimes and really struggle at other times?

Oh, how kind of you @coinjoe! Thank you so much 🙏

So, that was an interesting idea to prompt ChatGPT. Knowing my own running history and health well, the key things that stood out and are useful for me to play with are:

I'm lacking an aerobic base right now.
I can build an aerobic base.
I should probably go back to heart rate training again.

And, there is hope, because:

Endurance is much more trainable than raw sprint speed.