Masai Russell's World Record: Why Are Women's Hurdles Becoming So Fast?

Masai Russell ran 12.09 seconds in Zurich with a wind gauge reading a flat 0.0. No tailwind, no help from the conditions, nothing to argue with.

She simply ran faster over 100 meters and ten hurdles than any woman in history.

The record she broke, Tobi Amusan's 12.12 from the 2022 World Championships, had stood for four years. Russell took three hundredths off it, and less than forty minutes earlier, in the same stadium, Alison dos Santos had broken the men's 400m hurdles world record too.

Two world records. One hour. One Diamond League meet.

This wasn't a fluke performance

Russell didn't sneak up on this record. She ran 12.71 in 2022, 12.36 in 2023, 12.25 in 2024, 12.17 in 2025, and then 12.14 back in May of this year in Xiamen, the second-fastest time ever run at that point.

Zurich was her eleventh straight 100m hurdles race this season without a loss. This was a steady, visible climb toward a number everyone in the sport could see coming.

The record itself has been falling for decades

Amusan's 12.12 broke Keni Harrison's 12.20 from 2016. Harrison's mark broke a 28-year-old record set by Bulgaria's Yordanka Donkova back in 1988.

Russell is now only the second woman since Donkova to hold the world record and an Olympic title in the event at the same time. That's not a coincidence of one fast night.

It's the tail end of a genuine, multi-decade trend of the event getting faster.

What's actually driving the sport this fast

No single factor explains a record this significant, and it would be dishonest to pretend there is one.

What's changed across the sport broadly over the past decade includes better starting-block technology, shoe designs built specifically for propulsion off the blocks and over barriers, more scientific approaches to hurdle rhythm and stride pattern, and a deeper, more competitive global field pushing every top athlete to run faster just to make finals.

Russell's own answer, when asked what made this particular race so fast, was simpler. The track was hot, the field was stacked with Amusan and reigning world champion Ditaji Kambundji, and the atmosphere made a fast time feel almost inevitable before the gun even went off.

Where this goes from here

Russell isn't shy about the next target. "If we get a 1.9 wind behind my back, that could have been a sub-12 race," she said afterward, immediately pointing at the barrier nobody has ever broken.

Amusan, for what it's worth, ran a season's best of her own in defeat. That says something about the depth in this event right now.

Nobody's fading quietly. Everyone's just getting faster together.

Russell has now taken the world record from a rival who was still running the best form of her career. If a 12.09 with zero wind wasn't even close to her ceiling, how long before sub-12 stops being a hypothetical and becomes the next headline out of this event?

And that may be the most exciting part: the barrier is no longer just a number on a stopwatch. It is a target that now looks genuinely within reach, with Russell leading a generation determined to erase it.