It may have just been the warmup before the big show, but St. Anthony’s junior Andrew Stange only knows one way to attack those moments.

Just keep swimming.

Some swimmers used the 25-minute warmup period between the fourth and fifth race of the CHSAA boys swimming preliminaries Saturday at the Nassau Aquatic Center to cool down. But not Stange.

He was next in the 100-yard butterfly, a race in which he was seeded No. 1. He wanted to keep that top spot so he stayed in the pool to stay loose.

The warmup session led to Stange clocking the fast time of 51.03 seconds in the event. Earlier in the meet, in the 200 freestyle, he posted a top time of 1:42.06.

“I felt pretty good. We’ve all been doing really well so far,’’ Stange said, adding that he and his teammates are looking forward to Sunday’s CHSAA championship finals beginning at noon in the same pool.

St. Anthony’s looks to continue its undefeated season and win its first CHSAA title since 2010.

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Stange wasn’t alone in turning in impressive performances yesterday. Chaminade’s Costantino Camerano topped qualifying in the 50 free with a time of 21.38.

“I saw these other kids going really fast times before me and I just got so excited for it,” he said. “I just got in there and I don’t even remember what happened in the race. It was insane. I went and I smacked the wall and I saw my time, I was just so excited.”

In Thursday’s CHSAA diving championship at Fordham University, Chaminade senior Kieran Serrata won his second varsity championship and set a school record with 504.70 points.

“It was amazing because I knew throughout the whole meet that I kind of had the school record on my mind,” Serrata said. “I just took it dive by dive, really focusing on the entries and it worked out the way I planned.”

— OWEN O’BRIEN