I see... that's why it's so sweet.

...But I still don't quite get it.

I don't either... you won't become unable to move even if you won't eat for 1-2 hours, right?

A racer isn't going out for a walk. He is constantly in the action, moreover, there are special challenges.

You need this stuff to move, not just be able to move.

Teams consist mostly of the folk, who usually can live without eating anything for many months, so they won't have an intuitive feeling. And only Akkyun thought of this, because if she won't eat, she will die. (Yukari)

...Now, everyone had their meals after watching racer Hakurei. (Kou)

Correct, all teams understood the meaning in general, but they still couldn't get their timing right.

And Reimu-san knows her timing?

It was... just a hunch, I think.