XX-XY Athletics founder Jennifer Sey slams Nike over its alleged funding of child transgender athletes study

XX-XY founder Jennifer Sey appears on OutKick's "Don't @ Me with Dan Dakich" to talk about Nike's alleged funding of a controversial child trans athletes study.

XX-XY Athletics founder Jennifer Sey slammed Nike over its alleged funding of a study on puberty blockers for children and how it would affect their athletic and training performance.

The research is looking to discover how much medical intervention there needs to be for a male to "fairly" compete in girls’ and women’s sports. 

The first notion that Nike was allegedly funding was in a New York Times article published over the weekend about the plight of Blaire Fleming – the San Jose State Spartans transgender female volleyball player who played a controversial role in the 2024-25 NCAA women’s volleyball season.

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A Nike swoosh logo at Nike by Eugene. (Kirby Lee-USA Today Sports)

OutKick pointed out that the piece mentions Joanna Harper, a trans woman who studies transgender athletes, is "currently helping to lead an ambitious study of trans adolescents that measures their results on a 10-step fitness test before they start hormone therapy and then, after they have begun to medically transition, every six months for five years."

The article then read, "But, she told me when we talked in February, ‘the current climate makes the study somewhat uncertain.’ I assumed she was referring to the Trump administration’s cuts to National Institutes of Health research grants, but she said money was not a problem: The study is being funded by Nike. The problem was Trump’s separate order targeting medical care for transgender youth. ‘If we can’t perform gender-affirming care,’ she explained, ‘then we can’t bring people into