The Gypsy King has been extremely vocal on social media recently by posting a number of videos calling out British champion Anthony Joshua.
Fury is hoping to return to the ring with a heavyweight clash against the IBF, WBA and IBO title holder.
But at 25 stone he would need to shed some considerable weight to have any chance of a comeback title bout.
Fury has previously said: “To be honest with you, I don’t need to get fit to fight somebody like you, at all.
“I’ll come to you and I’ll punch your face in for you. Even at 25 stone.”
And he has finally put his words into action and got into the gym in preparation for a showdown.
Fury is seen throwing jabs and dodging shots expertly with trainer Ben Davison.
He has also posted a follow up video where he is messing around on the pads, again with Davison, and he continually drops his guard, just like he did in his last outing against Wladimir Klitschko.
If he was to return against Joshua, or even Deontay Wilder, then he would have to be more cautious, given his opponent’s extraordinary knockout rate – of which they have 58 knockout from 59 fights between them.
Fury’s own unbeaten record stands at 18 knockouts from 25 fights.