World Athletics Relays
The World Athletics Relays, known as the IAAF World Relays until 2019, is an international biennial track and field sporting event where teams from around the world compete in relay races, some of which are not part of the standard Olympic programme. The first three editions were set to take place in Nassau, Bahamas at the Thomas Robinson Stadium in 2014, 2015 and 2017. Originally intended as an annual event, it was later decided to happen every odd year, the same as the IAAF World Championships in Athletics for which it serves as a qualification stage.
The competition format for the first edition included the 4 × 100 metres relay, the 4 × 200 metres relay, the 4 × 400 metres relay, the 4 × 800 metres relay and the 4 × 1500 metres relay. The first edition had a $1.4 million prize fund.
From the second edition, the 4 × 1500 metres relay was replaced by the distance medley relay. However, this was short-lived and was itself replaced by a mixed-gender 4 × 400 metres relay for the third edition. In 2019 the 2 × 2 × 400 m relay and the shuttle hurdles relay were added to the mixed-gender category.
The 2019 IAAF World Relays were held in Yokohama, Japan at the Yokohama International Stadium.
Championships
Championships records
Men
Women
| Event | Record | Athlete | Nationality | Date | Meet | Place | Ref |
| 4 × 100 m relay | 41.88 | Tianna Bartoletta Alexandria Anderson Jeneba Tarmoh LaKeisha Lawson | United States | 24 May 2014 | 2014 IAAF World Relays | Nassau, Bahamas | |
| 4 × 200 m relay | 1:29.04 | Jura Levy Shericka Jackson Sashalee Forbes Elaine Thompson | Jamaica | 22 April 2017 | 2017 IAAF World Relays | Nassau, Bahamas | |
| 4 × 400 m relay | 3:19.39 | Phyllis Francis Natasha Hastings Sanya Richards-Ross Francena McCorory | United States | 3 May 2015 | 2015 IAAF World Relays | Nassau, Bahamas | |
| 4 × 800 m relay | 8:00.62 | Chanelle Price Maggie Vessey Molly Beckwith-Ludlow Alysia Johnson Montaño | United States | 3 May 2014 | 2015 IAAF World Relays | Nassau, Bahamas | |
| Distance medley relay | 10:36.50 | Treniere Moser 3:18.38 ' Sanya Richards-Ross 50.12 ' Ajee' Wilson 2:00.08 ' Shannon Rowbury 4:27.92 ' | United States | 2 May 2015 | 2015 IAAF World Relays | Nassau, Bahamas | |
| 4 × 1500 m relay | 16:33.58 | Mercy Cherono Faith Kipyegon Irene Jelagat Hellen Onsando Obiri | Kenya | 24 May 2014 | 2014 IAAF World Relays | Nassau, Bahamas |
Mixed
| Event | Record | Athlete | Nationality | Date | Meet | Place | Ref |
| 4 × 400 m relay | 3:14.42 | Steven Gardiner Shaunae Miller Anthonique Strachan Michael Mathieu | Bahamas | 23 April 2017 | 2017 IAAF World Relays | Nassau, Bahamas | |
| 2 × 2 × 400 m relay | 3:36.92 | Ce'Aira Brown Donavan Brazier | United States | 11 May 2019 | 2019 IAAF World Relays | Yokohama, Japan | |
| Shuttle hurdles relay | 54.96 | Christina Clemons Freddie Crittenden Sharika Nelvis Devon Allen | United States | 11 May 2019 | 2019 IAAF World Relays | Yokohama, Japan |