I've had this small question in the back of my mind for awhile now and thought about making a thread about i.

However before I do that and inflict my own attempts at answers and theories on the world, I thought it might be best if I just quickly asked to see if the question has already been settled.

Kellhus does some quite amazing physical feats throughout the first series. What are peoples explanations to this? How come he is able to do those things? Cnaiur speaks of the results of breeding, but would the Dunyain really breed for anything but souls better capable of being self moving?

I'm fully prepared to chalk it all up to convenience for the plot. It is hardly something of central importance to the books. But it could be fun to talk about and see what theories people come of with for why this messiah is so incredibly jacked^^

Note on Spoiler tag. I have read all seven books. However I set the spoiler tag as just the first series thinking that it might  be more inclusive to do so. However if you want to mention things from later books feel happy to do so within spoiler blocks without worrying that I won't be able to read your reasoning without having anything spoiled for me.