Running exactly 400m isn't something most of us do on a regular basis, but that's what ex GB Athlete and former European, Commonwealth and World Champion, Iwan Thomas, excelled at!
It was back in 1997 that he set the GB 400m record time, which still stands today, at 44.36 seconds. He frequently led the field representing both Wales and Great Britain as he travelled the globe in competitions.
Fast forward 24 years to June this year and Iwan took on an epic challenge. He completed the iconic Centurion South Downs Way 100 mile race - SDW100.
After months of training, he tackled the gruelling course running from Winchester to Eastbourne in aid of a charity which is close to his heart - Group B Strep Support.
After his son, Teddy, encountered complications just hours after arriving in the world, Iwan has worked closely with the charity to help raise awareness of Group B with expectant mothers.
With this on his mind, Iwan was determined to finish and in style!
In the build up and during the event, the team behind the National Running Show followed him to document his training and preparation for the event.
We're pleased to say that they have launched the documentary and you can watch it on their You Tube channel or click the video below:
Here's just a snippet of the articles about why Iwan took on the challenge and how he got on:
Wales247 - Iwan Thomas defies scorching temperatures to complete 100 mile ultra-running challenge!
Hello Magazine - The former World Champion became the first Olympic sprinter to complete the run!
Credit to Phil Hill @PHBalance for the photos during the challenge!