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
Spirit of the Marathon Salazar, Grete Waitz, Paula Radcliffe, Joan Benoit-Samuelson, and Kathrine Switzer provide commentary about the sport. The focus is then on the six featured runners and their training for the 2005 Chicago Marathon. American Deena Kastor and Kenyan Daniel Njenga are both elite runners, and are determined to win the race. Kastor was the bronze medalist at the 2004 Olympic Marathon, but has yet to win a marathon. Njenga had finished second multiple times in previous Chicago Marathons. Kastor is shown training and recovering from an injury in Mammoth Lakes, California, while Njenga's life as a sponsored runner in Tokyo is