4 × 50 m medley relay, women, 25 m pool

What to remember

The 4 × 50 m medley relay exists only in short course: World Aquatics recognizes it in 25 m pools alone. Each swimmer covers 50 m in a different stroke, in a fixed order: backstroke first (that leg starts in the water), then breaststroke, butterfly and freestyle.

In Melbourne on December 17, 2022, at the World Championships, Australia stopped the clock at 1 min 42.35 s. Mollie O'Callaghan swam backstroke in 25.49 s, Chelsea Hodges breaststroke in 29.11 s, Emma McKeon butterfly in 24.43 s, and Madison Wilson finished in freestyle in 23.32 s. The breaststroke leg was the slowest of the four.

The event joined the short course World Championships in 2014, for men, women and mixed teams. The men's and women's relays were then removed from the 2024 program, leaving only the mixed version.