User blog comment:UnknownGeneralHero/Aura in relation to physical prowess/@comment-5780397-20160217224728/@comment-25014015-20160218063031

My main take on aura to physical strengh is the jump in power Killua got. Someone like Killua who had been training his entire life became more than 2x stronger after having trained with Nen for about a year and a half. So how does he gain such a huge boost bigger than he had ever attained even though he has always been training. He went from 16 tons prior to Nen to 64 tons after Nen, something happened there, and all I can see is Nen as he had already been training rigorously his whole life it almost makes no sense for him to have got such a massive boost in such a short time, so must be Nen, at least that's my take, he could have been realseing a higher degree of Ren unconciiously but that wasn't explicatly shown, or shown at all, so his Ten(which I believe is their base state) was seeminly enough achieveall that would have been active, and I'm pretty sure you can't not use Nen unless you Zetsu yourself or haven't learned Ten.