Los Angeles (AFP) - US track queen Allyson Felix she has set her sights on the 2020 Olympics after winning a record sixth gold medal at last year's Rio Games.

Last year in Brazil, the 31-year-old 400m and 200m star became the only female track and field athlete in history to win six Olympic gold medals last year when she won the 4x100m and 4x400m relay races.

"I am still excited about the sport. The biggest thing I have learned is that now I have all this experience, I know that I can train smarter and need to compete less," said Felix.