Marathon world record progression races were first held in 1896, but the distance was not standardized by the International Association of Athletics Federations (IAAF) until 1921. The actual distance for pre-1921 races frequently varied slightly from the present figure of 42.195 km (26 miles 385 yards). In qualifying races for the 1896 Summer Olympics, Greek runners Charilaos Vasilakos (3:18:00) and Ioannis Lavrentis (3:11:27) won the first two modern marathons. On April 10, 1896, Spiridon Louis of Greece won the first Olympic marathon in Athens, Greece in a time of 2:58:50; however, the distance for the event was reported to be only 40,000 meters. Three
Sanyo Women's Half Marathon of the podium. Yukiko Akaba is the only runner to win consecutive half marathon titles. Kenyans Chepyego and Evelyn Kimwei and Japan's Mizuki Noguchi (the 2004 Olympic marathon champion) are the only other women to win the race twice. Key: Sanyo Women's Half Marathon The Sanyo Women's Half Marathon, also known as the Sanyo Women's Road Race (), is an annual road running competition for women held in December in Okayama, Japan. It features both a 10K run and half marathon race (21.1 km/13.1 miles). Sanyo Shimbun, a daily newspaper, is the title sponsor for the event. The day's events