Watch the Day 6 preliminaries of the Canadian swimming trials from Victoria

Click on the video above at 12:30 p.m. ET to watch live coverage of the Day 6 preliminaries of the Canadian swimming trials from Victoria.

The heats feature seven-time Olympic medallist Penny Oleksiak racing in the women's 50-metre butterfly, while two-time Olympic medallist Ilya Kharun will compete in the men's 50m butterfly. 

The final day of competition concludes on the heels of an historic meet for Canadian superstar Summer McIntosh, who broke three world records and set two more national marks.

The Toronto native authored more history on Wednesday, breaking her own world record in the women's 400-metre individual medley. It followed world marks in the 400m freestyle and 200m IM. She also set Canadian records in the 800m freestyle and 200m butterfly. 

WATCH | McIntosh breaks her own 400m IM world record, 3rd world record from 2025 trials:

Summer McIntosh breaks own world record in 400m individual medley at Canadian swimming trials

She is the first swimmer to break a world record in three different individual events at one long course meet since Michael Phelps at the 2008 Beijing Olympics. The last woman to break three individual world records at one long course meet was Inge de Bruijn of the Netherlands at the 2000 Sydney Games, according to Olympic historian Bill Mallon of the OlyMADMen.

"I think 400 IM is the race I've come close to mastering for myself," McIntosh told CBC Sports' Devin Heroux.

"Happy to go best time. I think there's still lots of room for improvement in and out of the turns. ... overall happy with the time, but I know I can go faster."

WATCH | The Ready Room recaps all of Wednesday's action in Victoria:

Summer McIntosh lowers own world record in 400M IM for her 3rd of swimming trials |