Matt told the publication that he's found moderation is key, rather than limiting himself to a strict diet.
“When I’ve tried this before there has always been restrictions,” he said.
“I am an omnivore and so I am still going to have that occasional burger or the occasional pizza but I am not going to have it every week and I am not going to have pasta every night.”
While the presenter says he hasn't weighed himself, he admitted he had previously tipped the scales at 140kg.
“When you start training, you put on muscle and you drop fat so I am not sure how valuable the kilograms are,” he told the publication.
And leaving MasterChef seemed to be just the push he needed to get fit.
“This is the great thing about the gardening leave that I have been on, is actually having the time to go to the gym,” he said.
“It is all about healthy lifestyle as we know but the hardest thing is actually having the time where you can dedicate an hour to go to the gym.”
Last month, the former MasterChef judge couldn’t resist making a cheeky dig at Network Ten during an appearance on The Project.
While being interviewed ahead of the launch of his new cookbook, More, the discussion turned to his now infamous ‘disgustingly delicious’ line from season two of MasterChef.
The Project co-host Tommy Little brought up the incident, in which Matt famously dropped a plate on the ground to emphasise his praise of contestant Arron Harvie’s dish.
“How many plates did you smash? Did they make you do take, after take, after take?” Tommy quizzed.
“It’s Channel 10. One plate,” Matt quipped.
The entire panel, featuring Tommy, Carrie Bickmore, Waleed Aly, and Peter Helliar bust out laughing, with the latter adding: “He’s going swinging on the way out, isn’t he?”
Helliar’s comment was in reference to the recent announcement that Preston, as well as his former MasterChef co-star Gary Mehigan are jumping ship to Network Seven to front new cooking show Plate of Origin.