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In the Olympics, Kalla frequently participated in the 4x5 km relay, a cross-country skiing event involving teams of four skiers, each completing a 5-kilometer leg. This relay format demands endurance, teamwork, and strategic pacing to achieve the fastest cumulative time. Kalla's participation in this event highlights her exceptional stamina, technique, and collaborative spirit, contributing to her success and acclaim in the world of cross-country skiing.