Kejelcha Runs 56:51 in Buenos Aires to Snatch the Half Marathon World Record Back From Kiplimo
Yomif Kejelcha ran 56:51 at the 2026 Buenos Aires Half Marathon to break Jacob Kiplimo's 57:20 world record. How the record finally fell in South America.

Discover how temperature, humidity, wind, and other weather conditions affect running performance. Learn essential strategies for adapting your running to different weather conditions and optimizing your training year-round.