About the series

    Human to Hero

    Twice a month, Human to Hero gets to the heart of what it takes to be a sporting star, exploring the discipline, dedication and determination involved, as well as the sources of inspiration for the world's best athletes.

    Watch on Wednesday May 6 at 1130, 1245, 1445, 2130, 2245, 2345 and Thursday May 7 at 0445 (All times GMT). Read about CNN's special reports policy

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  • Korean Yeon Jae Son performs during her hoop program in the individual all-around final of 32nd Rhythmic Gymnastics World Championship in Kiev on August 30, 2013. AFP PHOTO/SERGEI SUPINSKY (Photo credit should read SERGEI SUPINSKY/AFP/Getty Images

    Up next ... Son Yeon-jae

    The 20-year-old rhythmic gymnast is the first competitor from South Korea to qualify for the All-Round finals at an Olympic Games. She followed up that achievement at London 2012 by becoming the first from her country to win a medal at the world championships, taking bronze in the hoop event in 2014. The same year she also won a historic All-Round title at the Asian Games.