Yomif Kejelcha reclaimed the world half-marathon record with a time of 56:51 in Buenos Aires. This run took 29 seconds off the previous record set by Jacob Kiplimo. Kejelcha first set the record in 2024.

The 28-year-old Ethiopian made his marathon debut in April, finishing second in London. His time of 1:59:41 was only 11 seconds behind the world record. Kejelcha's track career includes youth and junior titles in 3000m and 5000m. Read more racing coverage.

Kejelcha's record-breaking run follows his impressive marathon debut. His track achievements include setting the world indoor mile record in 2019. This record was later broken by Yared Nuguse in 2025. Related: Jadyn Keeler Aims for National Record at Copenhagen Championships.

This original Runner World brief is based on reporting from Athletics Weekly. Visit the source for its complete reporting, context and any later corrections.