Mighty Bob said:
Nah, I think it gets mentioned a couple of other times, the specific example that comes to mind is right before the Tree climbing exercise in the Wave Arc.
I'm looking now and I gather that
this is what you're referring to?
It says "body energy" and "spirit energy", yes, but it doesn't explain what either one is -- and Kakashi actually mentions neither.
And as I said, Kishimoto contradicts himself whenever he feels like it -- Ebisu explains that stamina goes straight into taijutsu without needing "chakra", but Gai (or maybe it was Kakashi, I forget) says that breaking the gates requires using chakra. Lee can't. Yet he can break the gates.
I smell self-contradiction. One of a metric fuckton throughout the manga.