unable to move

He was in a state where moving one fingertip was a feat—and yet he still tried to stand.
“It’s no use. Kami-yan, there is certainly a place one can’t force his body to reach, no
matter how much training you pile up, because of the construction of the human body.
If you want the details, then check the Tafel Anatomie.”
In other words, that was his weak spot.
“Y’know, Kami-yan, you can’t get through AIDS with fighting spirit, and you can’t cure
Ebola with guts—everyone knows that. This is the same thing. Right now it has nothing
to do with your idealism or whatever. You can’t currently stand from an anatomical
sense.”
A move against the rules.

- Toaru Majutsu no Index Volume 4, Chapter 4