Unbeaten in 13 races, Athing Mu is the future of athletics in America

    Athing Mu celebrates winning gold at the athletics world championships in Eugene, Oregon, last July.

    (CNN)Three years have passed since Athing Mu was last beaten in an 800-meter race. In that time, she's been crowned American champion, Olympic champion and world champion in the distance -- all before the age of 21.

    The extraordinary start to her professional running career has led many, with good reason, to view Mu as the most exciting athlete in track and field at the moment.
    When she held off a late challenge from Great Britain's Keely Hodgkinson to win gold at the world championships last year, Mu became the youngest woman in history to own Olympic and world titles in an individual track and field event.
      Given her meteoric rise and remarkable success since turning professional, it's perhaps unsurprising that Mu is feeling the weight of her past performances.
        "There's pressure, for sure," she tells CNN Sport from Los Angeles, California, where she has recently moved for a new training program.
        "And not only from obviously the outside world, but for myself, too, knowing that I was able to do these two things the past two years -- these really big, incredible things."
        It was January 2022 -- 13 races ago -- when Mu last failed to win an event of any distance.
          She was scheduled to run at the Millrose Games in New York this month but withdrew several days before the event, saying she wanted to focus on the outdoor season and the upcoming world championships.
          Mu takes a commanding lead in the 800-meter heats at the world championships last year.
          "I would love to keep that streak," says Mu. "I think the main thing for me is to continue to believe and know that no matter what happens, the only person going to be affected by whatever the result is, whether good or bad, is going to be myself.