Relay race

A relay race is a racing competition where members of a team take turns completing parts of racecourse or performing a certain action. Relay races take the form of professional races and amateur games. Relay races are common in running, orienteering, swimming, cross-country skiing, biathlon, or ice skating (usually with a baton in the fist). In the Olympic Games, there are several types of relay races that are part of track and field, each consisting of a set number of stages (legs) (usually four), each leg run by different members of a team. The runner finishing one leg is usually required to pass the next runner a stick-like object known as a "baton" while both are running in a marked exchange zone. In most relays, team members cover equal distances: Olympic events for both men and women are the 400-metre (4 × 100-metre) and 1,600-metre (4 × 400-metre) relays. Some non-Olympic relays are held at distances of 800 m, 3,200 m, and 6,000 m. In the less frequently run medley relays, however, the athletes cover different distances in a prescribed order—as in a sprint medley of 200, 200, 400, 800 metres or a distance medley of 1,200, 400, 800, 1,600 metres.

A swimming relay of four swimmers usually follows this strategy: second-fastest, third-fastest, slowest, then fastest (anchor). However, it is not uncommon to see either the slowest swimmer racing in the second slot (creating an order of second-fastest, slowest, third-fastest, and then fastest), or an order from slowest to fastest (an order of slowest, third-fastest, second-fastest, fastest).^{[citation needed]}

FINA rules require that a foot of the second, third or fourth swimmer must be contacting the platform while (and before) the incoming teammate is touching the wall; the starting swimmer may already be in motion, however, which saves 0.6–1.0 seconds compared to a regular start. Besides, many swimmers perform better in a relay than in an individual race owing to a team spirit atmosphere. As a result, relay times are typically 2–3 seconds faster than the sum of best times of individual swimmers.

In medley swimming, each swimmer uses a different stroke (in this order): backstroke, breaststroke, butterfly, and freestyle, with the added limitation that the freestyle swimmer cannot use any of the first three strokes. At competitive levels, essentially all freestyle swimmers use the front crawl. Note that this order is different from that for the individual medley, in which a single swimmer swims butterfly, backstroke, breaststroke, and freestyle in a single race, in that order.

The three standard relays raced at the Olympics are the 4 × 100 m freestyle relay, 4 × 200 m freestyle relay and 4 × 100 m medley relay.

Mixed-gendered relays were introduced at the 2014 FINA World Swimming Championships (25 m) (4 × 50 m freestyle and medley) and the 2015 World Aquatics Championships (4 × 100 m freestyle and medley). The event debuted at the 2020 Summer Olympics (4 × 100 m medley).

In open water swimming, mixed-gendered relays were introduced at the 2011 World Aquatics Championships (4 × 1250 m).

In athletics, the two standard relays are the 4 × 100 metres relay and the 4 × 400 metres relay. 4 × 200, 4 × 800, and 4 × 1500 m relays exist as well, but they are rarer. Mixed-gendered 4 × 400 metres relays were introduced at the 2017 IAAF World Relays, repeated at the 2018 Asian Games, the 2019 World Championships in Athletics and were added to the 2020 Summer Olympics. In addition, a 2 × 2 × 400 m and shuttle hurdles mixed relay races were introduced at the 2019 IAAF World Relays.