Competing in the 50m butterfly on Wednesday, Schoenmaker shattered her own national record in the heats, clocking 32.42 to chop 0.40 off the mark she set in the final of the 2018 Commonwealth Games on Australia’s Gold Coast.
She returned to the pool to touch the wall in 32.32 in the final, clipping another tenth of a second off her record to win the gold medal.
While the sprint race is not an Olympic event, all eyes will be on Schoenmaker this week when she turns out in the 100m and 200m breaststroke as the World Championships silver medallist continues her build-up towards the Tokyo Games in July.
Meanwhile, four-time Olympic medallist Chad le Clos also got his campaign off to a solid start at the national championships.
Le Clos dominated his first event, winning gold in the men’s 50m butterfly final in 23.72.