https://www.letsrun.com/news/2019/05/what-no-one-is-telling-you-an-athlete-who-ran-ncaa-track-as-a-man-for-3-years-just-won-an-ncaa-womens-title/

Prior to joining the women’s team this season, Telfer was a mediocre DII athlete who never came close to making it to nationals in the men’s category. In 2016 and 2017, Telfer ranked 200th and 390th, respectively, among DII men in the 400 hurdles (Telfer didn’t run outdoor track in 2018 as either a man or woman). Now she’s the national champion in the event simply because she switched her gender (Telfer’s coach told us that even though she competed on the men’s team her first three years, her gender fluidity was present from her freshman year).

The fact that Telfer can change her gender and immediately become a national champion is proof positive as to why women’s sports needs protection. Telfer ran slightly faster in the 400 hurdles competing as a man (57.34) than as a woman (57.53), even though the men’s hurdles are six inches taller than the women’s hurdles. Yet when Telfer ran 57.34 as a man, she didn’t even score at her conference meet — she was just 10th at the Northeast-10 Outdoor Track and Field Championships in 2016. Now she’s the national champion.