Summer McIntosh's record cross continues.
The 18-year-old set her third world record in five days during the Canadian championships in Victoria.
McIntosh lowered her own previous world record on 400 meters medley by 73 hundredths to 4.23,65.
World records are to be broken. The day I leave this sport, I want to be sure that the records are as fast as possible, said McIntosh.
It motivates me because I know that there is always a new generation on the way up that will chase the records.
Previously, Summer McIntosh has set new world records on 400 meters freestyle and 200 meters medley.
McIntosh took three Olympic Games gold medals in Paris last year.