A soldier with post-traumatic stress disorder is to scale one of Wales’s tallest peaks with a rowing machine strapped to his back to raise money for the veterans’ mental health charity that helped him through times of crisis.

Royal Fusilier Jonathan Roberson, based in Tidworth, will climb up and down Pen y Fan – the highest mountain in the Brecon Beacons – on Saturday, as many times as possible in 24 hours.

Along with the 26kg rowing machine, the 28-year-old will also be carrying a 3kg medicine ball, and each time he reaches the summit he plans to row the height of the mountain before heading back down again.

He could achieve two Guinness World Records for his efforts: most repetitions of Pen y Fan in a full day and most hikes completed carrying a rowing machine.

He told the PA news agency: “The minimum I have to do is six repetitions. So that’s up the mountain carrying the rowing machine, rowing the height of the mountain, and back down again. That’s one repetition. But I plan to do 10.

“When it’s done, I will have scaled over the height of Everest and rowed the height of Everest at the same time.

“Being in the military, Pen y Fan is like the gold standard. No matter what corps you’ve been in you’ve done the Fan and so that’s why I chose it.

“But when you’ve been up there in all weathers with an exercise kit weighing anything up to 40kg it gets a bit easy. So I thought, ‘what can I carry?’

“I was in the gym at the time and I looked down and saw the rowing machine and was like, ‘I wonder if I can carry that?'”

He has planned for 20 minutes of rest at the base in between sets, which he believes will each take two and a half hours.

Mr Roberson’s challenge is in aid of Combat Stress, which supports current and former members of the UK armed forces.

Originally from Newcastle, he joined the Army in 2013 and became a tracked armoured vehicle driver and gunner. In 2016, he qualified as an Army physical training instructor.

In 2017, due to a hole in his heart, he suffered a stroke during a strongman event and spent 13 days in hospital learning how to walk and talk again.

He spent weeks in a rehabilitation unit and in 2020 had heart surgery to close the hole in his heart.

But his years of illness had a profound effect on his mental health and he began to struggle.

“For the past five years I’ve had a lot of medical issues and it resulted in me being diagnosed with PTSD,” Mr Roberson said.

His fundraising page is at justgiving.com/fundraising/Jonathan-Roberson1