Carl Bengtström gained his first international experience in 2016 when he retired from the first round of the European Youth Championships in Tbilisi in the 400-meter run with 49.22 seconds and with the Swedish sprint relay (1000 meters) in 1: 56.29 min took seventh place. The following year he reached the semi-finals at the U20 European Championships in Grosseto over 400 meters and was eliminated there with 48.08 seconds. In 2018 he took part in the 400-meter hurdles at the U20 World Championships in Tampere , where he was eliminated in the semifinals with 51.55 seconds. He then took part with the Swedish 4 x 400 meter relay at the European Championships in Berlin , but was disqualified in the run-up. The following year he retired at the European Indoor Championships in Glasgow over 400 meters with 49.50 s in the first round and then won the hurdles in 50.32 s at the U20 European Championships in Borås, home .
In 2019 Bengtström was the Swedish champion in the 400-meter hurdles and in 2018 and 2019 indoor champion over 400 meters and 2020 in the 200-meter run .
Personal best
200 meters: 21.09 s (+0.9 m / s), June 27, 2020 in Gothenburg
200 meters (hall): 21.26 s, February 23, 2020 in Växjö
400 meters: 46.64 s on June 14, 2020 in Gothenburg
400 meters (hall): 46.95 s, March 1, 2020 in Gothenburg
400 m hurdles: 50.20 s, June 2, 2018 in Gothenburg