Nastia Liukin says what Simone Biles did in Tokyo is more impressive than any of her past Olympic wins

Simone Biles is one of the first world-renowned athletes to publicly prioritize mental health over competition — but the Tokyo Olympics certainly isn't the first event where an athlete has felt a toll on their mental health. Former Team USA gymnast Nastia Liukin said what Biles did isn't just important for fellow athletes, but for everyone watching.

"It was something that I will forever be so proud of her for doing because, you know she has set such a great example, obviously for everything she has done on the competition floor, but in my opinion, even more so off of the competition floor," Liukin told CBS News. "And what she did here, putting her mental health and her safety first, was something I think a lot of people can learn from." Liukin, who competed in the Beijing Olympics in 2008, was in Tokyo as a commentator when Biles decided to drop out of several events to focus on herself.