C.N. Terrassa · ESP
Isak is a swimmer from Spain, a butterfly specialist and a sprinter, whose official competitive record spans 12 seasons, 11 countries and 134 meets.
His recorded career begins in 2015 in Calella, where he raced the 25 freestyle in 21.97. He started out alongside C.N. CALELLA.
His signature event is the 100 butterfly, the event he has raced the most, followed by the 200 butterfly and 50 butterfly. Butterfly is the backbone of the whole record: 103 meets and 316 recorded swims.
His fastest 100 butterfly stands at 52.28, set in long course (50 m) at Paris (fra).
His record includes continental championships, between 2025 and 2026 (LEN European Junior Championships, Samorin, SVK and European Aquatics Championships (25m), Lublin, POL). A representative mark at that level is 1:58.39 in the 200 butterfly, recorded in long course (50 m). He also appears in national championships and international meets.
The record runs unbroken from 2015 to 2026: 12 consecutive seasons without a single missing year. 2025 is the busiest season on record, with 87 verified individual swims.
He is a genuinely international swimmer: the official record spans 11 countries (Spain, France, the United Kingdom, Poland, Slovakia, Lithuania, Monaco, the Netherlands, SLO, Switzerland and UNK), including 15 of 134 meets outside Spain.
Those meets span 28 different venues (Calella, Barcelona, Sabadell and Granollers…). He has raced for Spanish Swimming Federation, C.N. Terrassa and C.N. CALELLA.
Still active: the directory includes official activity in the 2026 season. Latest competition: Paris (fra), on August 14, 2026. He holds 38 current event personal bests and 329 all-time PB improvements across 521 verified official swims in competitions governed by RFEN.