4 × 100 metres relay 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 relay baton is carried by each runner. Prior to 2018, the baton had to be passed within a 20 m changeover box, preceded by a 10 metre acceleration zone. With a rule change effective November 1, 2017 that zone was modified to include the acceleration zone as part
150 metres 150 metres 150 metres is a sprint event in track and field. It is a very rarely contested non-championship and not an IAAF-recognised event. Given the proportion of standard running tracks, the event typically incorporates a bend when held in a track and field stadium, although some especially-built tracks allow the event to take place entirely on a straight. The event was given a high-profile outing in 1997 as an intermediate contest between two 1996 Olympic champions: Donovan Bailey (100 metres) and Michael Johnson (200 metres). Johnson pulled up mid-race, allowing Bailey to win the $1 million prize. This race