he seems to be able to live at both ends of the spectrum (100% right or 100% wrong, but never in the middle). and that can be indicative of someone with unresolved problems in their life rather than anything to do with 'cut and dry' weak mentality I made a post about this a few weeks ago because this is how I lived my life for a long time until I started resolving issues from my childhood. as easy as it was to eat bad, drink bad and take drugs, I could (in the right environment) switch that completely around and turn myself into a healthy, lean ball of muscle it wouldn't surprise me at all if fury peeled off that weight quickly, but he'll continue to yoyo badly if he has issues to make peace with. i'm inclined to think he does
Wouldn't be surprised if he came back out of shape to get blasted out in simular fashion as Stifferne. Of course he's on an entirely different level and quite a bit younger, but the way he abused his body is far beyond what Bermane did.