Katrina Matthews

“As soon as I heard of Sub8, I wanted to be involved. It sparked my interest intellectually as well as physically. I see my sporting endeavours as a case study for constant learning and improvement. I have yet to find a plateau in my physical improvement in any area, and this evolution keeps me right at the edge of passion and motivation for absolute excellence.”


13 / 03 / 91


58 kg/ 128 lbs


165 cm/ 5 ftin


BIRTHPLACE: Exmouth, England




Ironman 2nd, 2021 Ironman World Championship St. George
Trophy Currently a career-high 6th in the world in the PTO rankings
Ironman Qualified, 2021 Ironman World Championship St. George and 2022 Ironman World Championship Hawaii
1st Trophy 4th, 2021 Ironman 70.3 World Championship
3rd Trophy Third-fastest British female over the full distance (8:40:50) in history
1st Trophy Winner, 2021 Ironman UK Bolton
1st Trophy Winner, 2020 Ironman Florida
2nd Trophy 2nd, 2021 Ironman North American Championship Tulsa
1st Trophy 2x Middle Distance Wins
Trophy 3x Middle Distance Podiums
1st Trophy National Champion, 2020 RTTC National 100-Mile Time Trial Championships
1st Trophy European Champion, 2019 ETU Middle Distance Championships
1st Trophy National Champion, 2018 England Middle Distance Championships


Only seven years after she first began doing triathlons, Kat Matthews has become the third-fastest British female over the full distance, European and national champion, and a legitimate contender for world championships. In rising to the occasion by signing on to the Pho3nix Sub8 Project, Powered by Zwift, she puts herself on an even steeper trajectory to sporting greatness.

As an Army physiotherapist, Kat pursued a longtime keen interest in the human body and health helping injured soldiers get back to fighting fitness. It was in that environment she began exploring triathlon, going from grassroots sprints to winning middle distance races outright as an amateur to earn her pro card.

With only four months of full-time training under her belt she won the ETU Middle Distance Championship in 2019 and earned 16th place at her maiden appearance at the Ironman 70.3 World Championship. She also claimed fourth at Ironman Western Australia in her first pro race over the full distance.

Despite the limited racing available in 2020, Kat had a landmark year. She won Ironman Florida in 8:40:50 – the third fastest time over the full distance by a British female. Then she raced her first 100-mile cycling time trial, becoming British national champion. Finally, she claimed her first professional victory at Ironman 70.3 Tallinn.

Kat showed no signs of slowing down in 2021, placing second at the Ironman North American Championships in Tulsa before going on to win Ironman UK. These performances helped her earn selection for Team Europe at the Collins Cup, where she pulled her weight alongside already-established champions to help clinch the victory. She then capped the year with a fourth-place finish at the Ironman 70.3 World Championship.

But the best is yet to come. She has blasted out of the gates in 2022 winning at Ironman 70.3 Lanzarote off the back of dominating bike and run legs. With the wisdom to train and recover properly and a willingness to push her limits, can she ride the momentum into her maiden Ironman World Championship in St. George and onwards to the audacious attempt to go Sub8?


  • Ironman 70.3 Lanzarote

    MARCH 2022

    A great start to the season winning Lanzarote, but even more impressive beating out the world class field, including reigning Ironman World champion Annie Haug.

    Time: 4:17:46
    Position: 1

  • Ironman Bolton, UK

    July 2021

    Despite the disruption to the racing schedule, Kat finished second at Ironman Tulsa and won her matchup at The Collins Cup. Winning on home soil topped it off.George: 4th

    Time: 9:40:01
    Position: 1

  • Ironman Florida

    NOVEMBER 2020

    Her first Ironman win, in a time that now ranks her the third fastest British women over the distance.

    Time: 8:40:50
    Position: 1

  • Ironman 70.3 Calgary, Canada

    JULY 2018

    The result that propelled her to turn professional.

    Time: 4:25:15
    Position: 1

proudly raising money for the Pho3nix Foundation

Athlete News



2022 will be a year of two seasons for Lucy Charles-Barclay. This first half aiming to defend her Ironman 70.3 world title, and then be the first to go Sub8. The second half, become the Ironman world champion in St. George and Kona, and perhaps get on the road to the Paris Olympics.

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