Nineteen-year-old Simone Biles has a total of 14 world championship medals, making her the most decorated American female gymnast of all time She hasn’t lost an all-around competition since 2013 Biles and her coach Aimee Boorman have been working together since she was 8 years old Her signature event is the floor routine, an unparalleled display of her strength and stamina She invented her own move, "the Biles”, which consists of two back flips followed by a half twist in a laid out, or straight, body position.