Simone Biles did not withdraw from the Olympic gymnastic team event over a physical injury, she said in an interview, but because she did not have the drive and concentration to compete, and she felt that her mental health would harm the team’s chances.

According to Sports Illustrated, Biles told her coaches she needed to withdraw from the event after recording the lowest score during the competition on the vault, a gymnastics event she’s dominated throughout her career.  While they tried to build up her confidence, Biles hesitated:  “No,” she said. “I know I’m going to be fine, but I can’t risk the medal for the team, so I need to call it.”

Biles commented during an interview that her mind wasn’t in the right frame to compete at such a high level.  During warm-ups and on the vault try, she said she became confused while she was in the midst of her run and altered the routine she had planned to do to a simpler move.

Worried that she could hurt herself and what how her mindset might hurt her team’s chances of winning, Biles withdrew.  Jordan Chiles replaced her in the rotation and the team took the silver medal.  The athletes from Russia took the gold, with the United Kingdom taking bronze.

“I just don’t trust myself as much as I used to,” Biles said in an interview. “I don’t know if it’s age, but I’m a little bit more nervous when I do gymnastics. I feel like I’m also not having as much fun, and I know that”—she began to cry—”this Olympic Games I wanted to do it for myself, and I was still doing it for other people, so that just hurts my heart badly, that doing what I love has been taken away.”

“I have to do what’s right for me and focus on my mental health,” she said afterward. “That’s why I decided to take a step back.”

“We totally understood,” said Chiles, echoing the support of her teammates. “If we were younger, we would’ve been like, No, no, no! But we’re old enough to understand, because we’ve all gone through it ourselves.”