Board Thread:Naruto Discussions/@comment-1512913-20170609150729/@comment-26104757-20170609182707

Also, Hashirama most likely inherited the full extent of Hogoromo's body, more than the rest of the Senju, being that he is Asura's descendant, and if I'm correct, I believe this genetic makeup gives him excellent vitality, and chakra. I believe his regeneration capabilities are credited not only because of his vitality, and chakra, but also an exceptional skill in chakra control, seeing as he can use Chakra-Enhanced Strength, which would later be recognised as an application of Medical Ninjutsu, and the basis of this branch is heavily dependant on one's chakra control.