CNN  —  Women’s marathon world record-holder Ruth Chepngetich has been provisionally suspended after testing positive for a banned substance, the Athletics Integrity Unit (AIU) announced on Thursday. Chepngetich smashed the previous marathon record by almost two minutes when she ran a time of 2:09:56 at the Chicago Marathon in October 2024, becoming the first woman in history to break the 2:10 barrier. According to an AIU statement, the 30-year-old tested positive for Hydrochlorothiazide, a