Athletes

Our athletes represent our values with their life, spirit and achievements. As runners, they have pushed themselves against the odds. As people, they are inspirational examples of resilience.

Maria Polyzou is a legend in Greek athletics. Known as the “Marathon Woman of Greece,” Maria has pushed the boundaries of endurance running. She was the first Greek woman to complete the iconic 524km Athens – Sparta – Athens - Marathon route, paying homage to the legacy of Pheidippides. Her journey transcends athletic accomplishment, embodying resilience—a core value at ENA. Maria’s inspiring story of overcoming health challenges and adversity continues to motivate runners worldwide, proving that true strength lies in the ability to persist.

Kostas Houvardas is an accomplished long-distance runner and coach with a list of achievements both in Greece and internationally. Recently, he published EΠTA, a book detailing his impressive feat of running seven marathons in seven weeks, each under three hours. Kostas’s dedication, discipline, and passion for mentorship make him an inspiring role model for emerging athletes. His drive to push limits and guide others perfectly aligns with ENA’s vision of building a community rooted in resilience and high performance.

Constantine (Dean) Karnazes is one of the most influential figures in global endurance running. With a career that has redefined what it means to be an ultrarunner, Dean joins ena as a Global Ambassador, helping to strengthen our international presence and championing core values such as endurance, consistency, and personal growth through running.

Recognized by TIME as one of the “100 Most Influential People in the World,” Dean Karnazes has completed 50 marathons in 50 states in 50 consecutive days, raced at the South Pole, crossed the Sahara, and won the Badwater Ultramarathon — one of the world’s toughest ultra-distance events. Through his achievements, books, and speaking engagements, he has inspired a global community of runners to redefine their limits. Dean is also a passionate advocate for initiatives that encourage more children to embrace physical activity.