Caitlyn Jenner, a biological male who came out as transgender decades after winning a gold medal in the 1976 Olympics, opposes allowing biological men to compete in women’s sports.

During an interview on Fox News, Jenner declared, “biological boys, I’ve said from the beginning, should not be playing in women’s sports. We need to protect women’s sports.”

Transgender University of Pennsylvania swimmer Lia Thomas, a biological male, has been attracting significant attention while competing in women’s swimming. Thomas won a 1650 free last month by more than 38 seconds.