“I cannot believe I set this record.” Despite shattering the Korean record in the women’s 400m at the AichiNagoya 2026 Asian Games after a full 23 years, the voice of Kim Seo-yun (23, Changwon City Hall) was surprisingly calm. On the 26th in Nagoya, Japan, Kim recorded 53.38 seconds in the women’s 400m final. She bettered Lee Yun-kyung’s Korean record of 53.67, set in August 2003, by 0.29 seconds. It was a mark that had stood unbroken for 23 years. Having set a personal best of 53.81 in the...