A former female high school track star wrote an op-ed published by USA Today explaining that competing against and being defeated by biological males shattered her confidence and convinced her that being a woman meant she wasn’t “good enough.”

“I’ve lost four women’s state championship titles, two all-New England awards, and numerous other spots on the podium to transgender runners,” Chelsea Mitchell wrote in an op-ed titled “I was the fastest girl in Connecticut. But transgender athletes made it an unfair fight.”