Hans Christian Tungesvik has played his own part in Norway's triathlon explosion in recent years, an Ironman and Norseman champion who made the switch to Winter Triathlon in 2021 in triumphant fashion, winning individual and relay golds on his championship debut. With the 2023 World Championships being held in his native Skeikampen, we catch up with one of the favourites for this year's title and hear just what it takes to become an extreme tri world champion, and how Kristian Blummenfelt and Gustav Iden have reshaped Norway's triathlon landscape.