Karsten Warholm breaks the longest-standing record in men's track by beating Kevin Young's 29-year-old 400m hurdles world record in front of his home crowd in Oslo
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Norway's Karsten Warholm warmed up for the Tokyo Olympics in perfect fashion when he broke the 400 metres hurdles world record at the Wanda Diamond League meeting in Oslo.
The 25-year-old two-time world champion beat American Kevin Young's mark of 46.78 seconds, which had stood for 29 years, when he clocked 46.70secs at the Bislett Stadium on Thursday evening.
In a