Spyridoula Karydi gained her first international experience in 2017, when she took tenth place in the long jump at the European Youth Olympic Festival (EYOF) in Győr with 5.59 m and was eliminated from the qualification in the triple jump with a width of 11.70 m. The following year she won the bronze medal in the long jump at the U18 European Championships there with 6.23 m and reached fourth place in the triple jump with 13.27 m. In the fall she took part in the triple jump at the Youth Olympic Games in Buenos Aires , where she finished seventh. In 2019 she won the U20 European Championships in Borås, Sweden triple jump with 14.00 m and thus set a new U20 national record.
In 2020 Karydi became Greek triple jump indoor champion.
Personal best
Long jump: 6.71 m (+0.4 m / s), August 2, 2020 in Ioannina
Long jump (hall): 6.10 m, February 10, 2019 in Istanbul
Triple jump: 14.12 m (+0.1 m / s), July 22, 2020 in Athens
Triple jump (indoor): 13.53 m, February 28, 2020 in Piraeus