Karsten Warholm

In March, Warholm won eight gold medals in the Norwegian Youth Indoors Championships in 2013.[1] In June at the 2013 Bislett Games, he competed in the 200 m. He finished seventh in his heat with a time of 22.25 s and did not advance to the final. Usain Bolt won the heat with a time of 19.79 s.[3] At the 2013 World Youth Championships in July, he won gold in the boys' octathlon with 6451 points, a personal best.[4]

In 2014, Warholm competed in the decathlon as well as in specialised events. At the time, his possible future specialization were the long jump, hurdling and 400 metres.[5] His weakest performances in the decathlon were in the throwing events.[6]

In June 2014, Warholm set a Norwegian junior record in the 400 m with a time of 46.31 s.[7]

In July, he won silver in the 400 m at the 2015 European Junior Championships with a time of 46.50 s, 0.02 s behind Benjamin Lobo Vedel. He also won silver in the decathlon with 7764 points, a personal best.

In July 2016, while participating in the semi-final of the 400 m hurdles at the 2016 European Championships, he broke the Norwegian national record with a time of 48.84 s.[8] He then finished sixth in the final with a time of 49.82 s. In August, he made it to the semi-finals in the 400 m hurdles at the 2016 Summer Olympics.

In July 2017, he won gold in the 400 m hurdles at the 2017 European U23 Championships, setting a championship record of 48.37 s. He also won silver in the 400 m with a time of 45.75 s. In August, he won gold in the 400 m hurdles at the 2017 World Championships with a time of 48.35 s.[9] Two weeks after his success at the World Championships, he improved upon his own Norwegian record in the 400 m hurdles with a time of 48.22 s at the 2017 Weltklasse Zürich.[10]

At the 2018 European Championships Warholm won the gold medal in the 400 metres hurdles event with a time of 47.64 s, setting his new personal best and the new European U23 record.

In March, Warholm won gold in the 400 m at the 2019 European Athletics Indoor Championships. His time of 45.05 s equalled the European record set by Thomas Schönlebe in 1988.[11] In June, at the Oslo Bislett Games he broke the European men's 400 m hurdles record with a time of 47.33.[12] At the Müller Anniversary Games in July, Warholm improved on his 400 m hurdles time, taking it to 47.12 s.[13] At Weltklasse Zurich in August, Warholm set a new European record in the 400 m hurdles, with a time of 46.92, making him the third person to run under 47 seconds for the distance. He was chased to the finish line by Rai Benjamin, who became the fourth person to break 47 seconds, with a time of 46.98[2] At the 2019 World Athletics Championships in Doha, Qatar, he won the 400 m hurdles in a time of 47.42 seconds, retaining his championship from 2017.[14]