103-year-old Mieko Nagaoka is seen training in Yanai Swimming School, Yanai City, Yamaguchi prefecture, Japan, August 4, 2017. Mieko Nagaoka, born in 1914, took up swimming at the age of 82 to recover from a knee injury. She became the world’s first centenarian to complete a 1,500-meter freestyle swim in 2015, in one hour and 15 minutes. (Photo/SipaChina)
