The Champion Mindset with Joanna Zeiger, MS, Ph.D. Joanna is a world-champion former professional triathlete who competed for more than a decade. She’s an Olympian. She runs marathons. She’s a multidisciplinary coach. But her fitness wisdom has been hard-won. “My athletic life is littered with setbacks, chronic conditions, injuries and disappointment,” she writes in her book The Champion Mindset: An Athlete’s Guide to Mental Toughness. Dr. Zeiger, who qualified for the U.S. Olympic Trials six times overall—in swimming, triathlon and marathon—excelled on the professional triathlon circuit from 1998-2010 and was 2008 Ironman 70.3 World Champion before she had to go on hiatus due to injury. She then became a dominant force in marathons in her 40s.