Aussie man reveals how he lost more than 140 kilograms

It's estimated around half the nation is either obese or overweight.

Andrew Robson was one of them - but is no more.

"At my worst I weighed 263 kilos. Life was unbearable," the resident of Mount Druitt in Sydney's west, told A Current Affair.

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"It took me a quarter of an hour just to put on my shoes and socks because I couldn't see my feet.

"I would break plane seats and people would call me every name imaginable."

That was 18 months ago.

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"Today, I weigh less than half my body weight at 120 kilos and I feel happy and (am) enjoying life," 49-year-old Robson said.

"It wasn't easy but if I could do it, anyone can.

"I ate takeaway food all day, drank a lot of beer, ice cream, chips and chocolate - all the bad things we know about.

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"Then one day a doctor told me I would be dying soon if I didn't change my life.

"That's when I had a re-awakening".

"He started with short walks with me," his mum Kate said.

"Then it progressed into over an hour a day."

"Next I cut out sugar in my diet," Robson said.

"And I joined a gym".

It wasn't easy but support came from friends and strangers on his Facebook page who followed his journey.

There were no pills or surgery.

"I have my son back and I thought I was about to lose him," his father Barry said, through tears.

"I want to inspire others who may be like I was," Robson said.

"It can be done and let me tell you life is so much better when you are fit and healthy."