The 22-year-old swimmer Mary-Sophie Harvey, who took a World Cup bronze in the 4x200 meters freestyle in Budapest, wrote that she woke up "completely gone".
Then her team leader and a team doctor sat by her side and she did not remember anything from the last four or six hours.
On Instagram, she writes that she has chosen to share the experience to highlight that something happens too often.
"I'm still scared when I think about what I do not know about that night.
In a way, I'm still ashamed of what happened, and I always think I will ... But I will not let this define me. ”
The International Swimming Federation, Fina, has not yet commented on the incident.