Running News Daily

Another look at the new women’s marathon record set in Chicago today

30-year-old Kenyan Ruth Chepngetich destroyed the women’s marathon world record today (13 Oct. 2024) at the 46th Bank of America Chicago Marathon. Her time of 2:09:56 ripped 1:57 from the previous mark set in Berlin 2023 by Ethiopia’s Tigst Assefa (2:11:53).

At this point, the athletics record book feels like it ought to be written in No. 2 Ticonderoga pencil. That’s how fast records fall in this age of technological and nutritional advances. This is especially true at the longer distances where such advancements create greater margins.

Still, Ruth Chepngetich’s new world record stands out as history’s first women’s sub-2:10, and first sub-5:00 per mile pace average. But Tigst Assefa’s 2:11:53 mark set last year in Berlin had us all cradling our heads, as well. That performance cut 2:11 off Brigid Kosgei‘s 2:14:04 record from Chicago 2019, which shattered Paula Radcliffe‘s seemingly impregnable 2:15:25 set in London 2003.

In each case: Radcliffe’s, Kosgei’s, Assefa’s, and now Chepngetich’s record have caused mouths to gape in the immediacy of their efforts. But nothing should surprise us anymore.

Racing is often a self-fulfilling prophecy determined by one’s build-up. Ruth Chepngetich said in her TV interview she came into Chicago off a perfect three-months of training after her disappointing ninth-place finish in London in April (2:24:36). Two previous wins in the Windy City (2021 and 2022) and a runner-up in 2023 meant Ms. Chepngetich arrived well seasoned on this course, with a keen understanding of what training was required to produce such a record run.

Of course, sadly, no record in athletics can be free of skepticism considering the industrial level of PED use that is uncovered, seemingly, every other Tuesday. Though understandable, cynicism should not be one’s default reaction.

To maintain any allegiance to the game, to follow it with any interest at all, we have to celebrate each record at face value. Just as rabid fans have to acknowledge some records to be ill-gotten, cynics accept that many special runs are exactly as they appear, above reproach.

Besides, when you break down Ruth’s 5k splits, each one from 5k to 35k was slower than the previous 5k. Not until the split from 35k to 40k (15:39) did she run faster than the split before (15:43 from 30  to 35k)

5k   – 15:0010k – 30:14 (15:14)15k – 45:32 (15:18)20k – 60:51 (15:19)25k – 1:16:17 (15:26)30k – 1:31:40 (15:32)35k – 1:47:32 (15:43)40k – 2:03:11 (15:39)Fini – 2:09:56

1st half   – 64:162nd half – 65:40

So congratulations to Ruth Chepngetich and her team for a marvelous run through a beautiful city. Now, let’s see how long this mark stays on the books before the No. 2 Ticonderoga pencil gets pulled out again.

BY THE NUMBERS

There have been 26 women’s world records set in the marathon since Beth Bonner‘s 2:55:22 in New York City in 1971. Over the ensuing 53 years, the average percentage change from one record to the next has been 1:26%. See WOMEN’S WORLD RECORD PROGRESSION.

Today’s record by Ruth Chepngetich, 2:09:56 (just one second slower than Bill Rodgers‘ American men’s record in Boston 1975!), lowered Tigst Assefa’s 2:11:53 mark by a healthy 1.5%. And Assefa’s time cut Brigid Kosgei’s 2:14:04 by 1.65%.

These latest records are still taking significant chunks off their predecessors and doing so in quick order. That suggests women are far from slicing everything they can from even this new record.

Yet, when comparing the women’s marathon world record to the men’s (2:00:35, set by Kelvin Kiptum in Chicago 2023), we see a differential of 7.2%. That is by far the best women’s record vis-à-vis the men’s throughout the running spectrum. Second place on that list is Florence Griffith-Joyner‘s 10.49 100m in relation to Usain Bolt‘s 9.58, a percentage difference of 8.675%.

The traditional rule of thumb has been a 10% gap between men’s and women’s records. But there are so many factors in play, it is difficult to make any definitive statement that explains one event, much less one athlete from another. I guess that’s why we keep watching.