Junior Brandl started practising the
Korean
martial arts taekwondo in 2007 and participated in her first international competition in 2013. She competed for the
German national team for the first time in 2014, the same year she took part in her first European Championships (U21). In 2015, she finished first at the U21 European Championships in
Bucharest, and she won a bronze medal at the 2017 U21 European Championships in
Sofia.
Senior Brandl competed in the
World Championships in 2015 in
Chelyabinsk,
2017 in
Muju and
2019 in
Manchester in the +73 kg weight category, where she remained without a medal each time. In 2016, she participated in the
European Championships in
Montreaux,
2018 in
Kazan,
2021 in
Sofia and
2022 in
Manchester. In 2019, she was runner-up in the +67 kg weight class at the
Extra European Championships in Bari. In 2021, she was a participant in the qualifying tournament for the
Tokyo Olympics, where she finished third in the +67 kg weight class, but did not qualify to compete in the Olympic Games. At the 2021 Women's World Championships, Brandl won a bronze medal. In 2022, she participated in the
World Championships in Guadalajara and won a bronze medal in the
+73 kg weight class. Brandl competed at the
2023 World Championships in
Baku, where she lost in the +73 kg weight class in the opening fight (round of 32) to
Nika Klepac of
Croatia. In January 2024, due to her being in 8th place in the Olympic rankings, she qualified a quota place in the +67 kg weight class at the
2024 Olympic Games for Germany. On 14 May, the
German Olympic Sports Confederation nominated Brandl to participate in the
Summer Olympic Games in August 2024. In August, she represented Germany at the
2024 Summer Olympics, where she competed in the
+67 kg event and defeated
Arlettys Acosta in the round of 16. Brandl lost to
Althéa Laurin in the quarter finals, but since Laurin later advanced to the final, Brandl competed in the
repechage match. Here, she won against
Munira Abdusalomova from
Tajikistan and therefore qualified to the bronze medal contest, where she fought against
Lee Dab-in. In the bronze medal match, Brandl lost to Lee and hence took fifth place. In 2025, Brand became
military world champion in the heavy weight kg class in
Warendorf. == Personal life ==