Chepngetich took 87 seconds off her personal best set in Istanbul just two months ago to win in 2:17:08; an improvement of two minutes and nine seconds on the previous course record.
Running with male pacemakers, a lead pack of six women covered the first 10 kilometres in 32:23, half of whom were left running together as they reached the half-way point in 1:08:10 – significantly quicker than the target time of 1:09:30.
But while one of that trio, Ethiopia’s Workenesh Edesa, was unable to maintain that pace for much longer, Chepngetich and 2017 Dubai-winner Ethiopia’s Worknesh Degefa kept it going, passing 30 kilometres in 1:37:16 and 35 kilometres in 1:54:00.
With the pacemakers having done their job, Chepngetich gradually opened up a gap on her one remaining rival over the closing kilometres before going on to finish in 2:17:08.
The 24-year-old became the first Kenyan woman since 2006 to win in Dubai.