A runner does a full marathon every morning before work - and may have set a new world record after covering the distance every day for two months.
Many fitness fans like to go for an early morning jog, but Aaron Robinson completes the gruelling feat around parks and woodland near his home.
By Saturday (Feb 18), Aaron and his border collies, Inca and River, finished their 63rd marathon in 63 days.
If confirmed by Guinness World Records, this would set a new official consecutive marathon record for a male, up from the previous top score of 62.
Each marathon takes about five hours and Aaron gets up at 3am each day to run around Wanstead Park, Wanstead Flats and Epping Forest in east London, before work.
Aaron said the marathons are "hard work", adding: "It's quite hard to get enough sleep, get enough calories in and then go to work afterwards. You don't really recover 100 per cent before you start the next one."
He has also set up a fundraiser for the charity he works at, Hope For Justice, which aims to tackle human trafficking and modern slavery.
Aaron, from Newham, east London, said: "It is tough, but what I think about a lot is I can stop this at any time.
"The victims of modern slavery and human trafficking - they can't run away.
"They sometimes have their passports stolen, they're threatened, they're beaten.
"So I can say, 'actually it's really hard to run them', but it's nothing compared to what they're going through so that keeps it in perspective."
According to Guinness World Records, currently the most consecutive days to run a marathon distance by a male was achieved by Vishak Krishnaswamy.
Vishak, 62, ran the marathons from September 1 to November 1 last year in Maharashtra, India.
A spokesman for Guinness World Records said: "We look forward to receiving evidence from the attempt for our records management team to review."
Aaron hopes to continue to run a marathon every day for as long as he can with his two canines.
He added: "It's a good bonding thing. Because border collies are working dogs, if they weren't pets they would be used to working on a farm all day so they're very used to running and working hard and actually the cruel thing is just to keep them inside.
"They love it - it's basically a five hour walk for them.
"It's a good time to bond and spend some time with your dogs because when you get back they still want to play - they just don't get tired."
