4 × 100 metres relay a cinder track at the 1964 Tokyo Games. The women's world record stands at 40.82 seconds, set by the United States in 2012 at the London Olympics. According to the IAAF rules, world records in relays can only be set if all team members have the same nationality. 4 × 100 metres relay The 4 × 100 metres relay or sprint relay is an athletics track event run in lanes over one lap of the track with four runners completing 100 metres each. The first runners must begin in the same stagger as for the individual 400 m race. A
Track and field US Olympic Trials and the 1968 Summer Olympics and it began the process in which synthetic tracks became the standard for the sport. Many track and field stadiums are multi-purpose stadiums, with the running track surrounding a field built for other sports, such as the various types of football. The field of the stadium combines a number of elements for use in the jumping and throwing events. The long jump and triple jump areas comprise a straight, narrow 40-metre running track with a sandpit at one or both ends. Jumps are measured from a take off board—typically a small strip