Gretchen Walsh broke her own world record in the short-course 50m freestyle, swimming two lengths of a 25-meter pool in 22.75 seconds.
Walsh, competing at her home pool at the Universiy of Viriginia, went eight hundredths faster than her previous record set at the 2024 World Short Course Championships.
Walsh broke 11 world records (nine individual) and won seven gold medals at those 2024 Worlds in Budapest.
Short-course swimming is separate from long course, which is held in 50-meter pools like at the Olympics.
Walsh and other top U.S. swimmers are preparing for the next World Short Course Championships from Dec. 1-6 in Beijing.
The U.S. trials for the meet are Oct. 28-31 in Westmont, Illinois.