Trans Athletes, Title IX and the Fight Over Who Gets to Play

February 5 is National Girls and Women in Sports Day, a date that usually produces photographs of middle schoolers in jerseys and a proclamation nobody reads. In 2025, it produced something else. At the White House, surrounded by female athletes, President Trump signed an executive order titled "Keeping Men Out of Women's Sports," directing federal agencies to treat the participation of transgender girls and women on female teams as a violation of Title IX and to pull funding from schools that allowed it. The next day, the NCAA changed its rules to limit women's competition to athletes assigned female at birth. A law written in 1972 to open locker rooms and budgets to girls had become the main legal weapon in a fight its authors never imagined, and the girls on both sides of that fight were mostly teenagers trying to make a team.

In short: The debate over transgender athletes sets two real values against each other: a fair and safe female category, and the inclusion of trans girls and women in ordinary school life. In 2026 the Supreme Court held that Title IX and equal protection allow states to keep sex-based teams, which settles what states may do but not what they should do. This post lays out the strongest version of each side and argues for rules made sport by sport and level by level rather than blanket bans.

Title IX was about budgets before it was about bodies

Title IX of the Education Amendments of 1972 is one sentence long in its core: no person in the United States shall, on the basis of sex, be excluded from participation in, be denied the benefits of, or be subjected to discrimination under any education program receiving federal money. The law does not mention sports. The regulations that followed in the 1970s did, and they changed American life. Schools had to offer girls real opportunities, real equipment and real coaching. The number of girls playing high school sports grew many times over in the decades after.

Those regulations also allowed something important: separate teams for boys and girls in sports where skill matters and contact is involved. That carve-out is the reason a female category exists in American school sports at all. Without it, many girls would not make teams that selected purely on performance after puberty.

So the starting point of the modern fight is not invented. The female category was created on purpose, to protect girls' chances. The question is who belongs in it and who decides.

The case for keeping the female category closed

Here is the argument for restricting girls' and women's teams to athletes assigned female at birth, put as its best advocates would put it.

Male puberty produces lasting physical differences that matter in most sports: height, longer limbs, larger hearts and lungs, more muscle mass and bone density, and higher levels of hemoglobin. Research on trans women who suppress testosterone after male puberty suggests some of those advantages shrink but do not disappear, particularly strength and frame size. In sports like swimming, track and weightlifting, small margins decide who makes the final, wins the scholarship or stands on the podium.

Advocates for this view argue that the female category exists precisely because these differences are real, and that letting athletes who went through male puberty compete in it undermines the reason it was created. Some add a safety argument in contact sports, where size and power raise the risk of injury. And they point out that the girls who lose a spot on a roster or a place in a final are not abstractions; they are also students with their own claims under Title IX.

Many people who hold this view are not hostile to transgender people. Some are female athletes and coaches who spent careers fighting for equal treatment and see this as the same fight. That deserves to be said plainly, because the debate gets worse when each side assumes the other is acting in bad faith.

International sports bodies have moved in this direction. World Athletics in 2023 barred transgender women who had gone through male puberty from the female category in elite competition, and other federations adopted similar rules for their elite events.

The case for inclusion

Now the other side, at its strongest.

Transgender students are a tiny share of all athletes, and transgender girls who dominate their sport are rarer still. Most trans kids who want to play are looking for the same thing other kids get from sports: friends, a coach who cares, a reason to stay in school and a place to belong. Research on adolescents consistently finds that team sports are linked to better mental health and lower rates of dropping out, and trans youth face high rates of depression and suicidal thoughts. Shutting them out of school life has real costs.

Advocates for inclusion also argue that "male puberty" is not a single fact about every trans girl. A girl who began puberty blockers early, or who transitioned as a child, may never have gone through male puberty at all. Blanket laws that ban every trans girl from every girls' team, from kindergarten kickball to varsity, sweep in children for whom the fairness argument has little or no application.

And they raise an enforcement problem that should worry everyone. Rules that police who counts as a girl invite scrutiny of any girl who is tall, muscular or short-haired. There have been reported cases in several states of cisgender girls whose sex was questioned by opposing parents or officials because of how they looked. A rule meant to protect girls can end up subjecting them to inspection.

What the research can and cannot answer

Both sides cite science, and both tend to overstate what it says.

The research on physical differences between males and females after puberty is large and consistent: on average, men outperform women in most measures of speed and strength by margins that matter in competition. That is why the female category exists. The research on transgender women specifically is far thinner. Most studies follow small numbers of people, many of them not trained athletes, for limited periods after they begin hormone therapy. They generally find that muscle mass and strength decline with testosterone suppression but remain above typical female levels for years, while hemoglobin levels fall faster. How those findings translate to performance in a particular sport, at a particular level, is not well studied.

That gap cuts both ways. It means people who claim trans women have no advantage are going beyond the evidence. It also means blanket claims that every trans girl at every age holds a decisive advantage in every sport are not supported either, especially for girls who never went through male puberty.

Good policy would admit the uncertainty and invest in better research, rather than pretending the science has already settled a question it has barely studied. Governing bodies that write sport-specific rules can update them as evidence comes in. Statutes passed in the heat of a campaign rarely get revisited.

The law as of 2026

On the legal question, the Supreme Court has spoken. In West Virginia v. B.P.J., decided June 30, 2026, in an opinion by Justice Kavanaugh, the Court held that Title IX and the Equal Protection Clause allow states to maintain sex-based school sports teams. West Virginia's law limiting girls' teams to students assigned female at birth was therefore permitted.

Be careful about what that holding does and does not do. It says states may draw the line at sex assigned at birth for school sports. It does not require any state to do so. States that want to include transgender students on teams matching their gender identity can still write their own rules, and many do. The decision ends one legal argument, that the Constitution or Title IX forbids these bans, without settling the policy argument about what the best rule is.

The executive branch has gone further than permitting bans. Since the 2025 order, the Education Department and the Justice Department have treated inclusion itself as a Title IX violation and pressed states and schools to stop it. Maine became an early test after its governor, Janet Mills, told the president in person that the state would follow its own laws. Federal agencies moved to cut off funds and the Justice Department sued the state. The University of Pennsylvania reached an agreement with the Education Department in 2025 over its handling of the swimmer Lia Thomas's participation years earlier. Whether federal funding can be conditioned on excluding transgender athletes in states that choose inclusion is a different legal question from the one B.P.J. answered, and it is still being fought. For where the cases stand, the court-watch page tracks this term's opinions and the emergency docket.

Before 2025, the legal tide had run the other way. The Biden administration had issued a Title IX rule in 2024 that broadened protections against discrimination based on gender identity, though it deliberately left athletics for a separate rulemaking. A federal court struck that rule down nationwide in January 2025, and the new administration did not defend it.

Where I think progressives have made this harder

Here is the argument part, labelled as such. I think progressives have handled this debate badly, and the cost has fallen on trans kids.

For several years, the default progressive position was that any limit on trans athletes at any level was bigotry. That position lost the public. Polls show large majorities of Americans, including many Democrats, support some restrictions in girls' and women's sports, especially at elite levels. When a party treats a majority view as beyond the pale, it does not move the majority. It hands the issue to the other side, which then uses it to pass much broader measures that touch health care, bathrooms and identification documents.

A better approach starts by conceding what is true. Fairness in elite female competition is a legitimate concern. Physical differences from male puberty are real in many sports. Saying so is not a betrayal of trans people; it is the price of being believed on everything else.

Then it insists on what is also true. A second grader is not an elite athlete. Most school sports are about participation, not podiums. Sports differ: the case for restriction in contact rugby is not the same as in bowling, rifle or cross-country at the junior-varsity level. A policy that treats every trans child as a threat to every girl in every activity is not about fairness. It is about exclusion.

The defensible middle looks something like this: open participation in youth and recreational sports; sport-specific eligibility rules at competitive high school, college and elite levels, written by governing bodies with medical input; and dignified ways for trans athletes to compete, including open or mixed divisions where they make sense. That will not satisfy the loudest voices on either side. It might protect more actual kids than the current trench war does.

Some will say any compromise legitimizes the attacks. I understand that worry. But the alternative has been tried, and it produced laws in more than two dozen states that are broader than many of their own supporters would have chosen in a calmer debate.

The kids in the middle

Behind the legal briefs are particular students. A trans girl in a small town who joined the track team because her friends were on it. A cisgender girl who trained for years and felt something was taken from her when she finished behind a competitor she believed had an unfair edge. Parents on both sides who are frightened for their children. Coaches who just want to run practice.

It is possible to take all of them seriously at once. That requires leaders willing to say that fairness for girls and dignity for trans kids are both real goods, and that the job of policy is to protect as much of each as possible rather than pretending one of them does not exist. The worst outcome is the one we have drifted toward: a national culture war fought through children, where adults score points and teenagers absorb the damage.

What you can do

Sports eligibility is set by legislatures, athletic associations and school boards more than by Washington. That puts much of it within reach.

• Find out who writes the rules in your state. State legislators pass most sports eligibility laws. The representatives page lists your state legislators as well as your members of Congress, with contact details, so you can tell them what kind of policy you want and why.
• Show up at the school board. District and state athletic association policies often decide how rules are applied. Board meetings are public, and short, specific comments from parents and students carry weight. Our education page follows school policy fights around the country.
• Support groups that help families. Families of trans kids and families worried about fairness both need accurate information and, sometimes, legal help. The organizations directory lists LGBTQ+, legal aid and civil rights nonprofits by state.
• Follow the cases still moving. The B.P.J. decision settled one question; the fights over federal funding conditions and state inclusion policies are continuing. Our LGBTQ+ rights page gathers the coverage.

A one-sentence law from 1972 opened the door to millions of girls. The question now is whether the adults can write rules that keep that door open for girls without slamming it on the few kids who are different. That is a hard problem. It is not an impossible one.