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
United States Olympic Trials (track and field) United States Olympic Trials (track and field) The United States Olympic Trials for the sport of track and field is the quadrennial meet to select the United States representatives at the Olympic Games. Since 1992, the meet has also served as the year's USA Outdoor Track and Field Championships. Because of the depth of competition in some events, this has been considered by many to be the best track meet in the world. The event is regularly shown on domestic U.S. Television and covered by a thousand members of the worldwide media. As with all Olympic sports, the meet is