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The Ironman Hawaii is considered the most extreme triathlon in many places. But many consider the Norseman in Norway to be more demanding. The athletes have to overcome more than 5,000 meters of altitude in the long distance. Three-time world champion Sebastian Kienle has long dreamed of the extreme triathlon. He will compete there at the end of his career. You can also find this and other episodes in the ARD Mediathek: https://www.ardmediathek.de/dokus First broadcast: September 2, 2023 #ndr #doku #norseman