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History and controversy is expected to be made at the Tokyo Olympics this summer after the transgender weightlifter Laurel Hubbard was effectively guaranteed a place in the women’s super heavyweight category.
However, a number of scientific papers have recently shown people who have undergone male puberty retain significant advantages in power and strength even after taking medication to suppress their testosterone levels. Hubbard lived as a male for 35 years, and did not compete in international weightlifting. But since transitioning in 2012 she has won several elite titles.
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In describing the Connecticut case in the Wall Street Journal, opinion writer Abigail Shrier expressed a representative argument: when transgender girls compete on girls’ sports teams, she wrote, “[cisgender] girls can’t win.”
The opinion piece left out the fact that two days after the Connecticut lawsuit was filed by the cisgender girls’ families, one of those girls beat one of the transgender girls named in the lawsuit in a Connecticut state championship. It turns out that when transgender girls play on girls’ sports teams, cisgender girls can win.
The Olympics have had trans-inclusive policies since 2004, but a single openly transgender athlete has yet to even qualify.
The notion of transgender girls having an unfair advantage comes from the idea that testosterone causes physical changes such as an increase in muscle mass. But transgender girls are not the only girls with high testosterone levels. An estimated 10 percent of women have polycystic ovarian syndrome, which results in elevated testosterone levels. They are not banned from female sports. Transgender girls on puberty blockers, on the other hand, have negligible testosterone levels.
Plus, the athletic advantage conferred by testosterone is equivocal. As Katrina Karkazis, a senior visiting fellow and expert on testosterone and bioethics at Yale University explains, “Studies of testosterone levels in athletes do not show any clear, consistent relationship between testosterone and athletic performance. Sometimes testosterone is associated with better performance, but other studies show weak links or no links. And yet others show testosterone is associated with worse performance.” The bills’ premises lack scientific validity.
Often missing from the culture-war aspect of the debate is a focus on the type of questions that Dr. Eric Vilain has spent much of his career researching. Vilain, a pediatrician and geneticist who studies sex differences in athletes, says there are no good faith reasons to limit transgender women's participation in sports, especially at the high school level. Vilain has advised both the International Olympic Committee and the NCAA, and says these laws generally aren't based in scientific evidence, but rather "target women who have either a different biology or ... simply look different."
Vilain joined NPR's Michel Martin earlier this week for a discussion about the science surrounding trans athletes. Below are excerpts from that conversation, edited in parts for clarity and length.
While more studies may be needed to determine what these solutions should be, leading sports organizations like the NCAA have issued guidance based on their understanding of the current research. In 2011, the college sports organization’s Office of Inclusion released guidance stipulating that trans women should undergo a year of testosterone suppression before joining a team.
Hecox met that requirement by taking a year of hormone replacement therapy, which helps a transgender person’s body match their gender identity more closely. Hecox said the therapy changed her athletic abilities. Along with losing muscle mass, Hecox said her stamina decreased as well.
“I could feel myself getting slower, and I was all right with that,” she said.
Hecox said she believes the hormone replacement therapy brought her athletic abilities more within the range of other female athletes. In fact, despite a rigorous training schedule provided by the school, she was not fast enough to make Boise State’s track team in 2020.
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