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- Unit
- Seconds saved vs 57:30 (3,450 seconds) · men’s half-marathon
- Period
- 27 Oct 2024–23 Aug 2026 · three selected performances
- Source
- World Athletics reporting. Yomif Kejelcha, 57:30, Valencia, 27 October 2024 (ratified); Jacob Kiplimo, 57:20, Lisbon, 8 March 2026; Yomif Kejelcha, 56:51, Buenos Aires, 23 August 2026. The two 2026 marks were pending ratification in the cited dated reports; current ratification is not asserted. Values are 3,450 minus observed race time in seconds: 0, 10 and 39. This is a selection of three performances, not an exhaustive record history or continuous measurement. The initial zero is the observed baseline. Animation is visual interpolation; no intermediate observations, cumulative values or projections are added. Original marks, event dates, athletes, venues and primary links remain in the source notes.
- License
- Data: attributed factual race marks from World Athletics dated reports; primary links and transformation explained in source notes. Background: Brillia Running Stadium track, Petewarrior / Wikimedia Commons / CC BY 4.0, resized, positioned and shown with adjusted opacity. This empty 60 m indoor training track is illustrative, not a record-race venue or a photograph of the road races. Separate series marker: stopwatch by Twemoji contributors / CC BY 4.0, resized unchanged artwork. Original photo and license links remain in source notes; no endorsement implied.