Research shows that female runners have a more even running pace than male runners. Women marathon runners are, on average, about 18% better at running even splits than men. While men run faster genetically, it seems that women run smarter!
Researchers discovered that both women and men tend to slow down during the second half of a marathon, but that female runners slow down less. On average, women run 11% slower for the second half of the race, while men run 14% slower.