Mark Threlfall

Mark started out his career at the age of 11 when he started to compete nationally as a swimmer, competing at a national level and podiuming at the national championships, before making the transition to triathlon around 2007.

Mark always had his sights set on representing Great Britain at the Olympics and was selected for the World Class Programme for Great Britain in 2007, from there he competed in both World and European Championship events. During this time Mark won silver at the European Duathlon Championships in 2007, and bronze at the ITU Cross Triathlon World Championships.  Mark progressed onto middle distance triathlons in 2012, where he was placed 3rd at Ironman 70.3 UK in his first year as a professional.

In 2012 Mark stepped up to longer distance triathlons, having great success, all this while he was battling with turbulent health.  Then in 2015/16 Mark found out he had Haemochromatosis, which is a hereditary condition where iron levels gradually build up in the body over time.  This obviously had an adverse effect on Mark’s health.  This is where Edge came in, Mark has been able to monitor his iron levels and calculate when he has to give blood to bring his iron levels down without affecting his racing schedule.

You can find Mark on the Global Triathlon Network YouTube channel.