Karsten Warholm is a Norwegian athlete. He represents Dimna Idrettslag and has Leif Olav Alnes as head coach. He holds the world record in the 400 m hurdles. First with 46.70, July 1, 2021 during the Bislett Games in Oslo, then with 45.94 in the final of the Olympics in Tokyo. He also holds the Norwegian record of 400 m.