Mastering the mind games

Karen Chen, Figure skating, United States

American figure skater Karen Chen says athletes aren't always open about all of the challenges they overcome to compete in front of the world at the Olympics.

"I didn't ever talk about it, but before the team event I actually fell down stairs and I hurt my ankle," says Chen, who finished 16th overall in the women's single freestyle skating event.

"But you know, I was resilient and I was like, 'I'm going to compete'," she said. "I know that I went through this challenge, and I fought through with every single strength that I have."