Lia Thomas, a pioneering transgender swimmer, was officially prohibited from competition at the 2025 Olympic Games after her recourse against the gender policy of World Aquatics was rejected by the Sports Arbitral Tribunal (CAS). This decision relaunched the debate around the inclusion of transgender athletes in competition sports and has profound implications for lia Thomas aspirations.

In 2022, Thomas entered the story by becoming the first transgender woman to win an NCAA swimming championship, capturing national attention and arousing discussions on gender identity in sport. However, his career towards Olympic participation has encountered significant obstacles. In a recent decision, the TAS confirmed the policy of World Aquatics which prohibits transgender women who have reached male puberty to participate in the female tests. The court ruled that Thomas did not have quality to challenge this policy, which in fact excluded it from the Olympic selections

In June 2022, World Aquatics established its gender policy, only authorizing athletes who have carried out their transition before puberty to compete in female categories. As Thomas began its transition after having known male puberty, it does not fall under these regulations. The organization also introduced an “open” category for transgender athletes, although it has experienced little participation.

The announcement of the prohibition of Thomas aroused strong reactions in various sectors. The defenders of the rights of transgender people expressed their disappointment, considering the decision as discriminatory and as a denial of sporting opportunities for transgender women. In a statement following the decision, Thomas expressed his frustration, declaring: “General prohibitions preventing transgender women from competing are discriminatory and depriving us of precious sporting opportunities that are at the heart of our identities. She urged the other transgender athletes to continue to defend their rights.

Conversely, the detractors of Thomas’ participation in female sports praised the decision as a victory for equity in sport. Former swimmer Riley Gaines, ardent opposing the eligibility of Thomas, praised the decision as a triumph for women and girls in sport.

Thomas’ decision is part of a broader trend, where the governing bodies of various sports began to impose more strict rules concerning the participation of transgender athletes. This includes recent decisions in athletics and cycling which also restore the participation of transgender women in the female tests. The current debate raises crucial questions about the inclusion, equity and the future of competition sports while society is struggling with an evolutionary understanding of gender identity.

The ban on participating in the 2025 Olympic Games pronounced against Lia Thomas marks a turning point in the current debate around transgender athletes in sport. As it faces this setback, the broader implications of such decisions will continue to influence policies and discussions within sports communities around the world. The debate on inclusion and equity is far from over, and it remains to be seen how this question will evolve in the years to come.