Elfsborg swimmer lowered her personal record by over half a second.
Everything just clicked, or... It felt really bad for the first 50, I didn't have the rhythm I had this morning. But it was probably because I had a higher frequency with my legs and breathing rhythm and an extra kick. I did something differently, she says.
The time 54,46 was only 21 hundredths above the World Championship qualification limit.
Only Marrit Steenbergen, the Netherlands, reigning World Champion on the distance, was faster with 53,44, the second fastest time in the world this year.
"Want to qualify on all three"
Sofia Åstedt set her third personal record in Swim Open in Stockholm on as many events.
On the double distance, she went under two minutes (1.59,74) for the first time and on 50 meters freestyle, 25,20 was a improvement by 21 hundredths.
Right now, she is closest to an individual World Championship ticket on 100 meters freestyle. But the season is young.
I'm closest on 100, but I want to qualify on all three, she says.
Annoying to be so close to the World Championship qualification limit or a nice receipt?
It's a nice receipt. I've lowered my times on all three distances quite a lot and it's early in the season.
Only one World Championship ticket
Sara Junevik, 50 meters butterfly, is the only one who has taken an individual World Championship ticket to the championship in Singapore in July during Swim Open.
Louise Hansson and Victor Johansson are pre-nominated along with two women's relays, 4x100 meters freestyle and 4x100 meters medley.
There are many fine receipts for our part with Sofia Åstedt, Sara Junevik, and Victor Johansson.
Of course, I had expected a few more to take the chance, but Daniel Kertes (50 meters breaststroke) is only 19 hundredths away and Åstedt two tenths, says national team captain Martina Aronsson.
The World Championship window is open until the Swedish Championship in Norrköping on June 25-29.
With Sarah Sjöström out this year due to childbirth and Michelle Coleman having quit, it's a new and tougher reality for the national swim team.
Victor Johansson finished fifth on 800 meters freestyle with 7.49,72 – over 2.5 seconds above his own Swedish record.
German Lukas Märtens, who set a world record on half the distance on Saturday, won with 7.39,10.
Nice to go under 7.50 and finish really well, I lost some confidence after being so far behind Märtens on 400 meters, says Johansson.