McIntosh has done it again. The 18-year-old made it three world records in less than a week when she broke her own 400-meter individual medley mark.

McIntosh became the second woman and fifth swimmer overall to set three or more long course world records at one meet.

Already the world record holder in the 400-meter individual medley, Canadian teenager Summer McIntosh swam the world's fastest times in two more events over the last three days.