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To figure out how your body will respond in hot conditions, consider your “physiological equivalent temperature”

Kiplin Pastor had been training eight months for a rim-to-rim-to-rim​ run of the Grand Canyon​​​​​​, but COVID-19 stripped away that chance

In the midst of protests against police brutality and a global pandemic, four-time U.S. Olympian Meb Keflezighi weighs in on racism and running

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Five kicks that transition seamlessly from trail to town

These four are my favorites for messy yard activities

I went out for a hike and forgot to put on you-know-what. When we crossed paths, was it really necessary to hit me with your self-righteous wrath?

When the Olympian accused her former team of skirting anti-doping rules, she became an outcast. But she kept talking.

Running is simple, but the basics are important

Kicks to sustain your toughest blacktop efforts

All-weather gear for every kind of summer running

Gear so light and comfortable, you’ll PR on your morning jog

Jessica Rogers and her team make some of our favorite trail-running gear

Just say no to chalky bars and gritty shakes

Every year, �����ԹϺ��� dedicates two whole magazines to gear. Here's what goes on behind the scenes.

Grip and support on any dirt, at any distance

Physiologists from around the world share their pet theories and crazy ideas on what it will take to break records

A new study of female athletes sees big strength gains from twice-a-week lifting

The company is upending the traditional athlete contract model, by hiring Mary Cain and Nick Willis as full-time employees

'Run for the Arctic' follows Pau Capell as he runs 155 miles in Norway to replicate polar bear migration

Our team of six testers covered over 1,000 miles to determine the best hydration packs

On trail running, trespassing, and what your neighbors do or don't owe you

Researchers put the four main running power devices through a series of tests and picked a clear winner

The joy of being a masochistic oddball

The response to Arbery’s murder highlighted what I already knew: the running world is deeply divided by race, and we must address it

The new men's Saxx Kinetic HD Briefs got a serious upgrade from the previous model—and they're way better for high-output activities

Runners used to just be obnoxious. Now we pose an active threat. 

As race directors of postponed events look toward the fall, the only certainty is that nothing is certain

One day, Michael Shattuck started to run. He liked it, so he ran longer, sometimes for as many as 65 hours each week. He never wanted to stop. What was he running from?

New research explores why you go slower and feel worse, even though you’re pushing as hard as usual

It's an upgrade on my previous favorite, the Iota, and my new go-to for backpacking and trail running

Coogan's was in business for 35 years but fell victim to the coronavirus pandemic

These men's jackets offer versatile protection for a variety of weather

Last week a paper suggested that runners and cyclists need much more than six feet. The report went viral, and backlash ensued. But there was some legitimate science behind the claims.

From tech gadgets to apparel upgrades, some of our best-reviewed gear make great presents.

But you still need to avoid others as best as you can

Stop worrying about weight gain. The pandemic gives you enough to think about.

'Dave Goes West' follows Dave Cook as he runs 260 miles from Dingle to Croagh Patrick on the west coast of Ireland

It’s an isolated struggle against an invisible adversary for an indefinite amount of time. Sound familiar?

Ben Rosario, coach of the Northern Arizona Elite, has some advice for runners in limbo

Four recent books explore other moments in the past 100 years when global events intersected with the Games

In an effort to slow the spread of the coronavirus, many governments have cracked down on the world's most elemental sport

'This Land' profiles runner Faith Briggs as she traverses 150 miles through three national monuments

Even with major races postponed, the sport remains upside down, with the focus still on shoes instead of who's wearing them

You can still get outside and go for a long, isolated jog. Here's how to layer right.

For endurance athletes, new research suggests that different pre-race rituals, or even no warm-up at all, give pretty much the same results

Spoiler alert! Those incessant emails offering the secret sauce or supplement for 100% strength immunity are 100% false. Time to rely upon science-based, expert-approved foods and supplements that actually work to support your immune system.

You know things are bad when the athletes and USATF are on the same page

Dad knees and an aging body changed my mind about Hokas

Our writer tests out a novel “natural performance enhancer”: breathing through your nose. It's harder than it sounds.

With every race canceled, runners face logistical and ethical dilemmas. Some have turned to unusual solutions. 

As the pandemic continues to surge and major races are canceled, we can return to running for its own sake

The outlandish-looking trail model is designed to enhance stability. Here's how it stacks up.

In 'Spirit Run,' Noé Álvarez recounts the journey that transformed his view of the world

New lab data from a record-setting 59-year-old offers insights on how we age—and, potentially, how to avoid it

No one can stop you from skiing in jeans. And really, doing lots of other things in jeans.

Technological advances and a growing line of research have paved the way for a new class of support systems that are comfortable, look good, and fit a wide(r) variety of bodies.

A record number of participants took part in the most thrilling marathon on American soil

Advances in technologies have ushered in a new era for the world’s most important piece of sports equipment

In a new column, Dr. Brian Cole answers readers' questions about over-the-counter meds and weak ankles

New technology is striving to make it happen

At the U.S. Olympic Trials, amateur runners have nothing to lose

What the Dave Scott-Thomas and Alberto Salazar scandals have in common 

Argeo Cruz ran the standard. But he had a much tougher obstacle to contend with. 

After tireless testing, these were our favorites under $150

From wind-resistant undies to traction devices, build a kit to brave the cold this season

Asia's most prestigious marathon is the latest victim of the coronavirus

We could all take ourselves a little less seriously

Last week, the shoe company announced that it will sponsor runners Alysia Montaño and Tina Muir

If the qualifying standard gets harder, will it dissuade runners from aiming high?

Gear that will get you out the door

Harold Bennally wanted to run the Boston Marathon in moccasins. So he planned a fundraiser on the Navajo Nation to get there.

The simple story of an unfair shoe with “springs” doesn’t capture the true complexity of the ongoing debate about technology in footwear

The legendary ultrarunner's top trails, both near and far

Iain Mickle's secret to tackling sub-three-hour marathons late into his fifties? Running buddies.

Play hard, but go easy on your wallet

Helpful advice, like "break your fall with your elbows, tailbone, kneecaps, or face"