A female Duke Law School professor who competed in track and field internationally in the 1980s discusses the International Association of Athletics Federations’ new rules limiting entry into women’s events to athletes who have testosterone levels that are capable of being produced solely by ovaries:
Understanding the rules and why they make sense is hard. They are based in biology people don’t know or don’t like to talk about and, let’s be honest, at least in some circles, they’re politically incorrect. They force us to talk about women’s bodies when it is increasingly taboo to do so, and they run counter to the movement that seeks to include transgender and intersex people in social institutions based on their gender identity rather than their biology.
She’s writing in the New York Times, in case you couldn’t tell:
Advocates for intersex athletes like to say that sex doesn’t divide neatly. This may be true in gender studies departments, but at least for competitive sports purposes, they are simply wrong. Sex in this context is easy to define and the lines are cleanly drawn: You either have testes and testosterone in the male range or you don’t. As the I.A.A.F.’s rules provide, a simple testosterone test establishes this fact one way or the other.
Testosterone throughout the life cycle, including puberty, is the reason the best elite females are not competitive in competition against elite males. This 10- to 12-percent sex-based performance gap is well documented by sports and exercise scientists alike. But it isn’t the most important performance gap. Rather, that’s the mundane fact that many nonelite males routinely outperform the best elite females.
Each year, the world’s best time in the women’s marathon is surpassed by hundreds of men. The women’s world records in all of the races on the track from 100 meters to 10,000 meters are also surpassed by many men each year, including by many high school boys. For example, in 2017, 36 boys ran faster than Florence Griffith Joyner’s seemingly unassailable 100-meter record of 10.49.
There is no characteristic that matters more than testes and testosterone. Pick your body part, your geography, and your socioeconomic status and do your comparative homework. Starting in puberty there will always be boys who can beat the best girls and men who can beat the best women.
Because of this, without a women’s category based on sex, or at least these sex-linked traits, girls and women would not have the chance they have now to develop their athletic talents and reap the many benefits of participating and winning in sports and competition. Eric Vilain, a geneticist who specializes in differences of sex development, has been blunt about it: removing sex from the eligibility rules would “be a disaster for women’s sport … a sad end to what feminists have wanted for so long.”
This may sound like hyperbole but it isn’t. In competitive sport, winning and room at the top are what ultimately matter, so relative numbers are irrelevant. It doesn’t matter that there are 100 females and three males in a girls’ race if the three males win spots in the final or on the podium because they are males. The unusually high incidence of intersex athletes in the women’s middle distances and their reported 100 percent win share in the women’s 800 meters at the Olympic Games in Rio show their disproportionate power.
