Jeff Dengate
Runner-in-Chief
Jeff is Runner-in-Chief for Runner’s World and the director of product testing. He has tested and reviewed running shoes, GPS watches, headphones, apparel, and more for nearly two decades. He regularly tests more than 100 pairs of shoes each year, and once had a 257-day streak running in different models. Jeff can usually be found on the roads, racing anything from the mile to a marathon, but he also enjoys racing up mountains and on snowshoes. When he’s not running, you’ll probably find him hanging from a ladder making repairs and renovations to his house (he’s also director of product testing for Popular Mechanics).
The Adidas Adizero Evo SL is my favourite running shoe of 2025 (so far)
It's soft enough for long runs, responsive enough for speedwork, and costs just £130
Tracksmith has a new trail running shoe. Can it handle the trails you run?
We put the Eliot Range to the test over everything from rocks and roots to asphalt to see how it performs
The New Balance Fresh Foam X 880 v15 gets softer, but stays affordably priced
With more foam underfoot, you’ll find the 880 pushes into max-cushioned territory
Shokz OpenRun vs OpenRun Pro: Which of these bone-conduction headphones is right for your run?
Both leave your ears open so you can hear cars and other hazards, but over thousands of miles, I’ve sussed out the key differences
An inside look at Faith Kipyegon’s shoes and gear for her sub-4 mile attempt
Titanium, carbon-fibre, 3D printing and wind tunnels all contributed to making the lightest and fastest race day kit
Faith Kipyegon’s 4-minute mile attempt has the potential to transform running
I visited the champion at her training camp in Kenya. Here’s what I learned and what it will take for her to succeed.
The fastest shoes at the 2025 Boston Marathon
This year's race featured blisteringly fast times and a wide range of brands on the feet of the top finishers
Nike x Hyperice Hyperboot review: High-tech trainers that soothe your battered feet
With inflatable chambers and heating elements, the Hyperboot can loosen up sore ankles and Achilles tendons before runs and workouts
NordicTrack Commercial 1750 treadmill review: Feature-rich and runner-friendly
The 1750 isn't cheap, but it brings the right features
Nike Vaporfly 4 review: The original marathon super shoe gets a big makeover
Thinner and lighter than ever, this new Vaporfly is better suited for shorter road races
The best folding treadmills for home gyms and small spaces
When floor space is limited, these quality machines collapse and roll out of the way
The fastest shoes of the 2024 New York City Marathon
Adidas and Nike claimed more than half of the top 10 shoes, but six other brands made it in among the speediest runners
How to run twice a day – and why doubles could work for you
Interested in following a twice-daily running routine? Here are some tips on how to get started
Normatec Premier takes the hassle — and hose — out of recovery
The new compression boots have air pumps integrated into each leg for a more portable, easier-to-use recovery system
These were the fastest shoes at the 2024 US Olympic Marathon Trials
Asics, Puma and Nike had a big day
The Saucony Endorphin Speed is a true do-it-all shoe
Whether on the track or during a marathon, the Speed is comfortable and fast.
How to transfer runs off your Garmin watch
Lost a run during the Garmin outage? Here's how to manually upload it.
The New Balance FuelCell TC delivers a soft, protective ride for long training runs
A carbon-fiber plate and thick midsole make it suited for marathons.
The Nike Free RN 5.0 returns to its roots as a foot-strengthening tool
Highly flexible and firm, it’s best used for speedwork and drills.