"It's understandably chilly in the Oakland Ice Center. Alysa Liu is gliding around in a knee-length navy puffer jacket. She marks some jumps and practices a spin, pulling her leg up within inches of her face. A large poster of Liu holding a gold medal looms over the rink, the text congratulating her on her 2018 junior national championship title. But it's out of date: She is now the 2019 senior national champion."