Meet the mechanic who spends every weekend running marathons in memory of his mother while working full-time and caring for his disabled wife.
Toby Hellman, 55, from Tregaron, Ceredigon, completely transformed his life after it was discovered his mother's cancer diagnosis was terminal.
His mother Jane Hellman, who was in her 80s when she died, was told the cancer was terminal when it returned for a second time a few years back.
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Before she passed away in 2016 her son, Toby, decided he wanted to start raising money to pay tribute to those who cared for her during her illness.
The first challenge he ever carried out was to complete nine sporting events in nine months but - looking back on it now - the task seems like a bit of a walk in the park.
Since then he has competed in the likes of Brutal Triathlon, Jurassic Man and is now attempting to complete DecaUK in July.
The toughest challenge of his life will see him take on a 2.4 mile swim, a 112 mile bike ride and a 26.2 mile run every day for 10 days.
Toby said he has never done anything this extreme before, and it will test him to and beyond his limits.
He trains every day and runs a marathon practically every weekend to prepare for the huge task that's ahead of him, even though he works as a full-time mechanic and also cares for his wife who is disabled.
When asked what first inspired him to take on the fitness challenges, Toby said: "The aim was to just raise money and awareness about Cancer Research Wales.
"That's why I basically started to do the nine events in nine months.
"At the time I thought it was really hard but, a few years later, it's not a lot for me.
"I think it's just me. You complete one challenge and you want to do more and more - doing it for charity just gives more purpose to it."
But Toby wasn't always as into sports as he is now. In fact, when he was at school, he pretty much hated it.
He said he's never really been one for group sporting events, but likes participating in individual events.
For Toby, running is not about speed, and he carries out his weekly marathons at a steady pace.
But, even so, it's incredible that he manages to dedicate so much time to training in memory of his mum despite having a very busy lifestyle.
Not to mention he's a former smoker, so the last few years have seen a huge lifestyle change for Toby in many ways.
Speaking about smoking, he said: "I gave up probably eight or nine years ago, and I have asthma.
"I'm going to keep going until I can't progress anymore. It gets bigger and bigger."
When asked what his mum would think of him competing in the great challenges, he added: "She would be proud.
"I have always been active. In school I wasn't sporty. I absolutely detested sports at school.
"When I was in the RAF I got into running. Then I left the RAF and drank and smoked, and spent a lot of time in pubs."
Now all Toby can think about is the next challenge, and he hasn't ruled out taking on an even bigger one in the future.
He said he will continue to compete in such events until he feels he can't do anymore, or feels he's reached his limit, but he says he hasn't reached this point quite yet.
When asked if he thinks he'll take on any more challenges after DecaUK, he said: "I'm not worried about that.
"This is my biggest event. I'm not thinking: 'will I do anymore?'
"I'm not thinking about that at the moment.
"It's like someone who sits on the coach and aims to do the 5k - they work for the 5k and that's brilliant. It just builds up.
"I just want to raise awareness, and raise more money for Cancer Research Wales more than anything else."
To sponsor Toby and make a donation to Cancer Research Wales, visit his fundraising page.
You can also find more information about Cancer Research Wales here.
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