Fury's diet itself involved 'Keto' to start - very few carbohydrates, meaning that the body burns fat for energy - matched with low intensity training. Since then, according to Blacklock, the focus has been on Fury maintaining a healthy sports diet of quality, organic protein and carbohydrate sources such as eggs, fish, chicken and other lean meat.
"Tyson's not a massive veg lover, but we do find there are things he will have," he said. "There's a peanut butter chicken recipe we've had on this camp which has been his favourite, cooked by his chef Tim Alcock. If you're enjoying your food, dieting it a hell of a lot easier."
Although Fury's weight loss has been dramatic, it has not been sudden.
"It's been an evolution, not a revolution," Blacklock added. "If you try and get a lot of weight off someone very quickly there's a lot of sacrifice. When you see these diets of six weeks to lose two stone, to do that you lose muscle mass, you lose quality because you can't get anywhere near enough nutrition in. You want a calorie deficit to lose weight, but if that deficit is too great, you don't just lose body fat. You lose body water and lean muscle.
"The key is that it has just been gradual. He has literally not had any real time off in the last year. He's trained very consistently. We've had three training camps, but it's been more like one training camp with a few weeks of low intensity after fights."
There are dangers in not having a break, but Blacklock insists that issue has not arisen with Fury. "In an absolutely ideal world we originally planned 18 months of this," he added. "But because the process has been so smooth, there's been nothing to derail it. He's been very consistent in his own diet and his lifestyle. He's barely had a drink in the last 12 months, he's been very, very controlled. If he was still over 20 stone now, we probably wouldn't be looking to fight Deontay Wilder. As we are, we're that far ahead of schedule there was no reason not to take the fight.
"We're not really worried about his weight for this fight. The last two fights, we've had little goals in terms of where we wanted him. This fight, we are monitoring him, his weight and body fat, but we're looking to trying to get him physically right for this fight. Bodies don't win fights.
"Tyson is never going to look like an Anthony Joshua. But, they don't need to for the way they're going to perform. Tyson is a very physically strong guy, he's very cardiovascularly fit as well. You cannot judge a book by it's cover in terms of physicality."
Fury has also been following a rigorous programme of lifting weights. "With the size of him, we're talking dead lifting and heavy compound lifts have been very large numbers," Blacklock said. "In kilos, it's deadlifting around 250kgs.
"But we've also been focusing on speed and explosiveness. Everyone knows Wilder's got speed so you've got to have your reflexes. Tyson is fast himself and if you look at the two fights before this, there was an obvious progression from the Seferi fight to the Pianeta fight. Not just how he looked, but the speed of his movements. We've improved that for this fight so he can be a little bit faster, lighter and quicker. I'm very confident we'll see the physical best Tyson Fury possible."
Food fight: Slimline Fury's new daily diet
9am: Breakfast
Two rounds of peanut butter brown bread toast.
11am: Workout
Protein shake.
1pm: Lunch
Jacket potato with tuna or beef or turkey chili.
4pm: Post-workout
Protein waffles with maple syrup.
7pm: Dinner
Peanut butter chicken with rice.
All meals to specific quantities designed and weighed out by nutritionist.
