[4][5] Horvath was born to Ernő Horváth and Emese Szöllősi from Budapest, Hungary, both physical education teachers.

[11] Defending champion Tia-Clair Toomey, however, came back strongly to win by 64 points,[12] while Horvath came in comfortably at second place beating off Katrin Davidsdottir for the position.

[3] At the Dubai Crossfit Championship held in December 2018, Horvath had to withdraw due to a back injury despite being the favorite to win.

[15] She nevertheless qualified for the 2019 Games as national champion, however, she was eliminated on the 3rd day after failing to make the cut for the top 10, and ending up in 14th place.

[17] At the 2022 CrossFit Games, Horvath started poorly, but managed to climb back up the leaderboard with wins and good placements in the final two days, eventually finishing third behind Tia-Clair Toomey and Mal O'Brien.

[19] In January 2023, she took part in the team competition at Wodapalooza with Jamie Simmonds and Gabriela Migala and won.

[22] Horvath did not defend her title after she withdrew from the 2024 CrossFit Games due the death of Lazar Đukić from drowning.

[23] Later in the year at the 2024 Rogue Invitational, Horvath won 4 events in a row, but failed to beat Tia-Clair Toomey for the title and came second.