What’s next for Coleman after conquering his latest challenge?
“I’ve done some interesting things,” Coleman told BBC Sport Wales.
“I’ve played every Premier League camp, I started in Southampton and finished in Newcastle, that was good, I raced to Lisbon in Portugal for Euro 2004 and I broke a lot of world records on treadmill in 1998.
“I looked for things where I could stand out from other people and where I could make my mark as a runner.
“You have to play to your strengths, I’m not particularly fast, my marathon PB is three hours and 24 minutes, so I had to find a place where I could shine.
“Being able to run a marathon every day for 40 days, that’s my kind of thing.”
Coleman says that, for him, running is about mental resilience.
“I have gone out 1229 times to run a marathon and I have never finished, I have always somehow reached the finish line, sometimes very well, sometimes with difficulties.
“My thing is to complete, not necessarily compete, but complete. I think that has also helped me in the dark moments of life.”
Coleman is hopeful his son can continue the family’s career journey.
“I’m running the Marathon des Sables again with my son in April. He said he’d only do it once, but he signed up quickly, so maybe he’ll follow in my footsteps a little bit.
“I want to keep doing this for as long as possible, I’ll be 64 next year, and as long as I can go and do the big multi-track races and finish and still enjoy it, I want to do this for as long as possible.
“I’m sure there will be a deeper underground marathon and I hope they invite me to do it.
“Running is really a part of life now and I don’t remember it not being a part of it.”