You have to believe that Jesus, being God in the flesh, was in perfect health. Since he was a manual laboror for all his life he probably would have been in pretty good shape. And if he were crucified on a cross (and the article states the greek doesn't exclude that it was a pole or a stake) he might have only been bearing the cross piece.
We know this how? The majority of his life is not described in scripture. His birth is reported, a very brief sketch of his youth is described in scripture, and then he goes off radar until he is described as being about thirty years old.
How do we arrive at the conclusion that he was a manual laborer?
No hostility here, just want to know.