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Darren 'Dibsy' McClintock used to be addicted to fast food so much that his weight ballooned out to 40 stone and he was told he would die if he didn't change his ways.
Well, he's just gone and completed the Great North Run - which is a half marathon.
Dibsy was one of 57,000 people who crossed the line in Newcastle and the bloke managed to complete it in two hours and 43 minutes.
Speaking to The Mirror after the race, he said: "I'm alright, my legs are hurting a bit!
"But the support there was mental. I didn't realise how much support there would be, people shouting along the way, it was unbelievable.
"It's an amazing feeling afterwards, knowing you have done it. I found it hard but the sense of achievement is unbelievable. If you'd told me I would be doing the Great North Run, even a month ago, I would have laughed!
"I'll definitely do that again next year and hopefully get a better time as well."
Dibsy gained headlines across the UK when news of his personal trainer's tactics went viral.
Personal trainer Mike Hind toured all of Dibsy's regular fast-food stops with a flyer after doctors told his 27-year-old client that he was 'eating himself to death'.
The posters named Darren with the headline: "Save Dibsy. Obesity is Killing Him. Do Not Serve This Man."
Brutal but effective at the very same time.
He was eating pasties, chips and pies daily before being given the urgent wake up call when he was hospitalised with heart problems.
He has now embarked on a healthy new lifestyle with the help of award-winning personal trainer Mike.
The two of them have have gone around their hometown of Middlesbrough handing out posters to all Dibsy's favourite restaurants.
He's dropped 19 stone since going on his incredible health journey and he says he's a new person because of it.
Dibsy told LADbible: "It's been very hard - like, to the point where I've just wanted to walk out a give up, but obviously I've got these people around me who keep me motivated, keep me going."
He said he's really starting to feel the benefits, adding: "I'm living life now! It's just a matter of keeping going with it."
Because Dibsy is now literally half the man he used to be, he's been left with a great deal of excess skin.
However, he's been unable to get NHS funding for the surgery to remove it, meaning he and Mike have turned to the masses with a Crowdfunder campaign.
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