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In page Ivar Ballangrud:

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In addition to his five official world records, Ballangrud skated 16:46.4 in a 10,000 m pack-style test race before the Olympic Games in 1932. This time was 31 seconds below the then-current world record and it would stand unbeaten as the fastest 10,000 m time for twenty years, until Hjalmar Andersen set his famous world record of 16:32.6.