A real earthquake has shaken the world of international sport: Lia Thomas, the transgender American swimmer who has become world-renowned for her performances and the debates she has sparked, has announced her official retirement from women’s sports competitions. This decision comes after the International Women’s Sports Federation (IWSF) declared her “inadmissible” to compete in women’s categories. The urgent announcement has provoked a torrent of reactions, ranging from sadness, anger, relief, and questions about the future of sports policies related to inclusion.

Lia Thomas had established herself in recent years as one of the most iconic figures in contemporary sport. As the first transgender swimmer to win a major women’s event in the United States, she attracted both enthusiastic support and fierce criticism. Her victories sparked a global debate on the place of transgender athletes in elite sport, highlighting the difficult balance between inclusion, fairness, and respect for established categories.

In an official statement, the IWSF justified its decision by stating that it wanted to preserve “the integrity and fairness of women’s competitions.” The organization stated that new studies and scientific consultations had led to a reevaluation of the eligibility criteria for transgender athletes, resulting in Thomas’s exclusion. “Our mission is to ensure that all competitions are conducted in a fair environment. After review, it has been determined that Lia Thomas does not meet the established criteria to compete in the women’s categories,” the statement read.

Faced with this decision, Lia Thomas took to her social media to express her disappointment and pride in having dared to fight for her dreams. “Today, I am being excluded from women’s competitions. It is an immense pain, but I leave with my head held high. I hope my journey will inspire others to believe in themselves, despite the obstacles and judgments. Sport has been my life, and even if I can no longer compete, I will remain committed to equality and inclusion,” she wrote.

The news sparked a flurry of reactions in the sports world. Some athletes and LGBTQ+ rights activists denounced the decision as discriminatory, believing the IWSF was bowing to political and media pressure. “This isn’t just a decision against Lia Thomas, it’s a step backward for all transgender people in sports,” said one inclusion activist. Others, however, welcomed the decision, calling it necessary to preserve fair competition between biological women.

Beyond Thomas’s personal case, this affair has reignited a heated global debate. How can we define fair rules that both allow for the inclusion of transgender athletes and guarantee sporting fairness for all? Positions diverge sharply: some federations advocate severe restrictions, while others seek intermediate solutions such as specific categories or more flexible hormonal criteria.

For observers, the Lia Thomas case will remain a major turning point in the history of modern sport. It illustrates the difficulty institutions face adapting to social and scientific developments, while meeting often conflicting expectations between inclusion and equity. Thomas’s name will be associated not only with her swimming achievements, but also with an era of intense debate and deep divisions.

Some fear that her withdrawal will discourage other transgender athletes from pursuing their sporting ambitions. Others, on the contrary, hope that this case will pave the way for a much-needed clarification of international rules. What is certain is that the discussion around inclusion in sport is only just beginning, and the decisions of major federations will continue to be closely scrutinized.

For Lia Thomas, the future is still unwritten. Several media outlets report that she could turn to advocacy and activism, becoming a powerful voice for transgender rights. She has reportedly already been approached by associations and sports organizations interested in involving her in educational and awareness-raising projects.

In the meantime, her retirement from competitive swimming marks the end of a chapter as glorious as it is controversial. Lia Thomas leaves the sporting scene with a brief but remarkable career, which will have left an indelible mark on the history of women’s sport and debates on inclusion. Between admiration and protest, she will remain a key figure whose career will have helped redefine the contours of contemporary sport.