Board Thread:Boruto Discussions/@comment-9782468-20190322181903/@comment-30323490-20190323220721

He is 30 something years of age...most ninjas probably don’t even peak by that time. Jiraiya was arguably at his strongest when he died and he was 50+. Naruto also has been the hokage only for couply of years, definetly under 10. Oonoki also pulled his best fight when he was almost 80.

Naruto can be 100 years old and it still wouldn’t make sense for him to be exhausted after a taijutsu battle. Even pre-KSM teen Naruto had better stamina feats than this. And we are talking about full-nine tails Hokage six paths Naruto here. I mean c’mon...

Delta could be 7th Gate Guy + (which she probably is) and it still doesn’t make sense for Naruto to be that tired. I know that Naruto intentionally took a lot of hits from her to distract her from the kids, but still...

My guess is that Naruto only exhausted his own reserves and still has at least most of Kurama’s chakra untapped, hence why he is so tired. I mean even he said to Delta that he has always been extraordinary when it comes to chakra, and we all know that Naruto was hailed even during his teen years by having large chakra reserves in his own, without the nine-tails.