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By week three, my right knee filed a formal complaint

Last year, Sunseri broke the speed record for ascending and descending the 13,775-foot peak. The record was shortly revoked

No fancy equipment is needed—just your finger, your Notes app, and 60 seconds a day

For Suicide Prevention Month, we're re-airing a story about what grief looks like on the other side

The author of Babel, Yellowface, and the upcoming Katabasis, talks about how running and creativity have a lot in common

The Olympian and writer shares affirmations and insights on confidence, curiosity, and letting sport—and life—evolve with you

Olympian Alexi Pappas refuses to be boxed in by labels or expectations. Her secret? Trusting the universe, wearing glitter, and never asking permission to be exactly who she is.

Knowing your foot shape, arch, the way you walk, and even your toe shape makes it easier to find comfortable, supportive shoes that fit

Tracksmith, the clean-cut, preppy New England running brand, is embracing the gritty trails with its new head-to-toe Overland Collection

These trail running trips around the world turn vacations into high-altitude, heart-pumping adventures. They're also about community, discovery, and finding balance between challenge and enjoyment.

Beat the crowds and see the city’s classic landmarks and lesser-known gems on a local-guided run

A thank you letter to our beautifully simple, often painful, but always rewarding sport

This innovative harness stores a retractable, always-available leash that my dog carries for me

"Never outrun your joy of running.” —Julie Isphording. How to train and fuel well as a runner.

Thinking of taking the 13.1-mile plunge but not sure where to start? This half marathon plan will carry you from the sofa to the start line—and across the finish, too.

Training plans for those who have never run before to runners looking to improve their performances

At Nike’s Breaking4 event in Paris, the Kenyan star clocked the fastest ever mile by a woman. Here's how she did it—and why the 4-minute mark remains elusive.

Six years ago, Nike orchestrated the world’s first sub-two-hour marathon. Now, the brand—and Faith Kipyegon—are going after the women’s mile with a high-tech suite of shoes, apparel, and race-day strategies.

We tested over 50 pairs of running shorts to find the most comfortable and functional for every type of run

From expert-level kneading to mindful companionship, cats prove they’re more than just cough potatoes—they’re unsung heroes in runners’ lives

The new documentary, screening at the �����ԹϺ��� Festival, shares the pain of American Indian history—and the resilience and strength of young Paiute runner Kutoven Stevens.

Chef and restaurateur Marcus Samuelsson talks about reconnecting with his Ethiopian heritage and how his mom dared him to run his first marathon

Ten testers tried 47 running shorts over 4,500 miles. These came out on top.

We tested 75 tees and tanks on roads, trails, and in the lab to find the best running tops for staying cool and dry all summer long

Ten runners tested more than 50 t-shirts and singlets over more than 4,000 miles, then we put them through the lab. These came out on top.

Loud? Sure. In the way? Maybe. But these crews are carving out space—and making cities feel like home.

Take it from a professional trier-of-new-things: taking up a new outdoor pursuit can change your life—and the more hurdles you face in doing so, the more reasons you have to try

From cowgirl boots to running shoes to sunglasses, these are the spring gear products our editors can't get enough of.

The year’s top gear for outdoor adventures, reviewed here

Lactic acid has long been vilified, but new research shows that it doesn't impair muscle function. In fact, it might actually be good for you.

We tested more than 25 running packs over a wide range of distances, speeds, and terrains. These seven rose to the top.

The writer explains how he was foiled by Internet trickery during a monthlong running contest to win free Chipotle

When electrolyte levels drop too low, performance can suffer. Avoid that dip by dialing in your nutrient intake.

I walked 62,804 steps around Manhattan. Somewhere around mile 20, I realized that slowing down didn’t need to mean falling behind

Ditching the data and simplifying my runs for a month had some unexpected side effects. Here’s why you should try it.

New data suggests that the most efficient uphill slope is steeper than you think

From heated gloves to new shades, this winter gear is changing the game for our editors and contributors this season

Dammit, Ben Stiller, there you go making me use my brain during my relaxing TV time

What endurance athletes can learn from one runner’s close call

With a sprinter van and a passion for shoes, Aaron Olbur is inspiring others to take their first steps toward better health

Understanding when and why men outperform women, and under what circumstances that can change, is suddenly a fraught topic.

New data from 2.5 million marathon finishers finds that subtle changes in air quality can affect your race time

New data shows that the biggest difference between elite and middling runners is how much time they spend jogging

Looking for a last-minute holiday gift? Check out these pieces of gear our editors are obsessing over in December.

Everyone knows taking time off is good for you—in theory. Maybe these new results will convince you to actually do it.

Getting yourself a new pair every so often can help you perform at your best and avoid injury

If you want to up-level your running, here’s how to get a jump on the new year

A veterinarian by day and ultrarunner by night, Paris became the first woman to complete the notoriously hard race this year

A selection of (mostly) new titles for fans of science, endurance, fitness, and adventure

Because there is no such things as bad running weather when you have the right gear

It may be mud season, but that’s not stopping us from getting outside with these pieces of gear

Because having cold hands or head on a run is no fun

This remote mountain town has had its ups and downs. In recent years famous races put it on the map, but some knew of its year-round treasures all along.

YouTuber Matt Choi was disqualified by marathon officials because his cameramen obstructed other runners. The author presents a plan to allow participants and influencers to coexist.

From visibility concerns to navigating uneven terrain, running in the dark poses real challenges—but we have solutions

Scientists recently examined the physiology of the increasingly popular open-ended race format—running 4.167 miles every hour—pioneered by Gary Cantrell.

From Swedish Fish to fun-size Twix, I tested Halloween candy as fuel for long runs. Here’s how they compare to traditional sports nutrition—and ones that won’t haunt your training.

Just because you can doesn’t mean you should

Stop carrying your phone in your hand when you run—these packs, pouches, and pockets are safer and more comfortable

Critics say the first sub-2:10 marathon was impossible—and fueled by doping. Our columnist examines the science as he tries to make sense of the backlash.

Fall is in full swing, and our editors are loving every minute of it. Here are the pieces that are keeping us cozy outside this season.

I fought the resurgence of these goofy packs until I figured out that they’re convenient and comfortable—especially when worn as sling bags

Ultramarathoner Callie Vinson shares her running journey and the lessons she’s learned along the way

The husband of runner Camille Herron admitted to having altered the Wikipedia biographies of prominent ultrarunners. The revelation came after a Canadian journalist launched an investigation.

Mountain runner Michelino Sunseri appeared to have climbed the iconic peak in record time, but the arbiters of speed determined it didn’t count

Follow the lead of these light-footed adventurers, and reap the rewards

Researchers were once convinced that some people have a bigger training response than others—but the data says otherwise

The season is coming to an end—here’s the gear that is keeping our editors outside until the very last moments of summer warmth

A Swedish company’s baking soda formula was the hottest supplement at the Olympics. And now a new study finds that it really works.

Endless singletrack, postcard views, and tight-knit community make the PNW a trail runner’s paradise. New to the scene? Local experts share their tips and favorite gear for soaking up the magic.

Five questions with running coach David Roche about his improbable victory and course record at the iconic ultramarathon

Stay healthy and energized with whey protein

The gear that let us brave monsoon season in the west and heat waves in the east

New technology is distorting track records. Ethiopian running legend Kenenisa Bekele makes the case that his world records are superior to the current ones.

Everyone knows how to run. Now biomechanical analysis may teach us how to do it better.

It's Dauwalter’s third straight course-record win, while almost 49-year-old Pommeret nailed the grueling 100-mile event on the first try to take down Kilian Jornet’s course record