Relais 4x100 m mixed
Related to the relays, the World Athletics Council approved the running order for the 4x100m mixed relay at the upcoming World Athletics Relays Guangzhou 25 as woman, woman, man, man. This running order will be reviewed after the event in Guangzhou. Records for the 4x100m mixed relay will be recognised as of 1 January 2026 (with the inaugural performance to better the recognised world best performance as of the end of 2025). As well as forming part of the race programme for the World Athletics Relays in Guangzhou, the mixed 4x100m will be contested at the inaugural World Athletics Ultimate Championship in Budapest in 2026.
300 m haies
The 300m hurdles will become an official event, forming part of the Competition Rules & Technical Rules. As such, it will serve all World Athletics statistical purposes, including world rankings towards which it will score as a similar event to the 400m hurdles. A list of world best performances will be kept, while conditions for setting an inaugural world record will be decided at a later stage, once the popularity of the event will have reached a meaningful level.