Fury has to box and move the entire fight if he comes in just a little to heavy against a man who has a right hand like wilders then he opens himself up again with being dropped in the later rounds even if miles in front like ortiz was through 7. I still think wilder knocks him out late with another bomb from the skies.
Fury will never look on great shape. Even against Wladimir Klitschko he had the love handles. However, he has as good a gas tank as anyone in the division and he's fought comfortably at a good pace over 260 pounds plenty of times. I saw footage of him the other day doing pull up's with ease. For a man of 19 stone, that's impressive. Perhaps he feels stronger than ever with the new diet and S&C work.