Looking for a new challenge, Mark Walford took on a 24 hour triathlon challenge with a difference to raise funds for Alzheimer’s Research UK.

It was a mix of short and long-course racing this weekend, as Supertri returned in Chicago and Leeds held its first ever IRONMAN event in the city.

Event organisers are invited to bid for GB Age-Group Team Qualifiers and British and Home Nation National Championships, including Welsh Super Series.

More than 50,000 people will complete an IRONMAN this year, but do you know what is involved in doing one?

Jamie Heselden has been sober for nearly ten years, and for his latest challenge he is taking on IRONMAN Leeds. Here he tells his story.