 By defending her title at 2012 London Olympics, Hwang Kyung-Seon became the first woman ever to win three Olympic taekwondo medals.Hadi Saei and Steven López, along with Huang Chih-hsiung of Chinese Taipei, are the only three athletes to have won medals in multiple weight classes.Taiwanese Chi Shu-ju is the youngest athlete to win a medal (17 years, 10 months, 1 day) and Hadi Saei is the oldest (32 years, 2 months, 13 days).