• Summer McIntosh set a new world record in the women's 400m freestyle.
• Her time of 3:54.18 surpasses the previous record held by Ariarne Titmus.
• This achievement follows her Olympic success in Paris, where she won multiple medals.
• McIntosh expressed confidence from her training leading up to the event.

At the Canadian Swimming Trials in Victoria, British Columbia, 18-year-old Summer McIntosh shattered the women's 400 metres freestyle world record with a time of 3:54.18, surpassing the previous record of 3:55.38 held by Australia's Ariarne Titmus. McIntosh emphasized her rigorous training in the lead-up to the event, stating, "Going into tonight, I knew that my training has been really good these past few months, and I knew that I could do something special," according to Channel News Asia and South China Morning Post.

McIntosh's recent performance at the trials is a significant milestone in her blossoming career, having previously won three gold medals at the recent Paris Olympics. Her time in the 400 freestyle demonstrates her consistent improvement, as she reflected, "I just felt so strong throughout, and that's never been the case in the 400 freestyle for me," according to Reuters.

Aside from her historic freestyle achievement, McIntosh has also broken Katinka Hosszu's long-standing record in the 200m individual medley at these trials shortly after her freestyle record. This underlines her dominance, as she expressed excitement about the upcoming world championships, noting that setting records boosts her confidence, according to Reuters.