In 2021 Martínez participated in the World Championships along Inés Bergua, Ana Gayan, Valeria Márquez, Uma Mendez and Patricia Pérez, finishing 12th in the All-Around and 5th in the 3 hoops + 4 clubs' final.

[10] Mireia took part, with Ana Arnau, Inés Bergua, Valeria Márquez, Patricia Pérez and Salma Solaun in the 2022 European Championships in Tel Aviv, winning silver in the 3 ribbons + 2 balls final, and the World Championships in Sofia where the Spanish group won three bronze medals: All-Around (earning them a spot for the 2024 Olympics), 5 hoops, and team.

[11] In 2023 Mireia and the group debuted at the World Cup in Sofia, taking 11th place overall and 8th with 3 ribbons & 2 balls.

[24] At the European Championships in Budapest the Spanish group won bronze in the All-Around, silver with 5 hoops and gold with 3 ribbons & 2 balls.

[27] In early August Mireia, Ana Arnau, Inés Bergua, Salma Solaun and Patricia Pérez competed at the Olympic Games in Paris, where they took 10th place in the qualification event and thus not advancing to the final.