“Trans women are not biological men,” declared Yannis Pitsiladis, co-author of a groundbreaking study that’s turning the tide in the debate over transgender inclusion in women’s sports. Now, with the Supreme Court agreeing to review bans from Idaho and West Virginia, the nation’s highest legal authority is set to weigh in on a question that’s both deeply personal and fiercely political.
The legal battle centers on whether laws that bar transgender girls and women from competing in female sports are about ensuring fairness or amount to outright discrimination. West Virginia’s law, for example, defines sex strictly as “biological sex determined at birth,” and Idaho’s “Fairness in Women’s Sports Act” requires physical exams to verify sex if an athlete’s eligibility is challenged. Supporters, like West Virginia Attorney General John B. McCuskey, argue, “Girls deserve a safe, fair playing field today — not years from now — and the ruling’s present harm to women and girls is stark.” Meanwhile, Joshua Block of the ACLU counters, “Categorically excluding kids from school sports just because they are transgender will only make our schools less safe and more hurtful places for all youth,” as reported by NBC News.
Despite the heated rhetoric, the actual presence of transgender athletes in school sports is exceedingly rare. In Utah, out of 75,000 student athletes, just one transgender girl—a 12-year-old swimmer—was competing as of 2022. In Florida, state records showed only two trans girls had played girls’ sports in the last decade. A 2021 Associated Press analysis found that most state legislators pushing for bans couldn’t name a single transgender athlete in their own regions.
Public opinion, however, leans heavily in favor of restrictions. A poll by The Post and KFF revealed that two-thirds of Americans believe trans girls should not be allowed to play girls’ sports. Yet, people who personally know a transgender individual are more likely to support their participation, highlighting how personal connections can shift perspectives.
Title IX, the landmark federal law prohibiting sex discrimination in education, sits at the heart of this debate. The Biden administration has proposed that blanket bans on transgender athletes would violate Title IX, but also acknowledged that some restrictions in competitive sports could be lawful. The Trump administration, in contrast, issued an executive order titled “Keeping Men out of Women’s Sports,” directing schools to bar transgender girls from female teams or risk losing federal funding. This policy shift has already led to high-profile changes, like the University of Pennsylvania’s recent decision to exclude transgender women from its women’s teams after a government investigation.
Scientific research adds another layer of complexity. While bans are often justified by claims about physical advantage, recent studies suggest the reality is nuanced. A study published in the British Journal of Sports Medicine found that transgender women athletes, after at least a year of hormone therapy, had lower lung capacity, VO2 max, and jump height than cisgender women, though they maintained higher grip strength. As Pitsiladis explained to the New York Times, transitioning athletes may end up “carrying this big skeleton with a smaller engine,” potentially putting them at a disadvantage in sports requiring endurance or agility. Joanna Harper, a leading researcher in the field, emphasized, “This fear that trans women aren’t really women, that they’re men who are invading women’s sports, and that trans women will carry all of their male athleticism, their athletic capabilities, into women’s sports—neither of those things are true,” as quoted in Outside Online.
Other research underscores the need for caution in drawing broad conclusions. A recent cohort study found that transgender women athletes were, on average, taller and heavier than cisgender women, but showed no difference in body composition or bone mineral density. When it came to performance, transgender women had lower anaerobic power and jump height compared to both cisgender women and men, challenging assumptions about universal advantage. The authors called for more comprehensive, sport-matched studies to clarify these findings (British Journal of Sports Medicine).
As the Supreme Court prepares to hear these pivotal cases, the intersection of law, science, and lived experience is more visible than ever. The outcome could reshape not only the future of school sports, but also the broader landscape of civil rights and inclusion in America.
