We asked a range of experts how they see things shaking out during a very challenging time

A leading company redefines what it's actually measuring, and explains why that's what we really wanted all along

A new study explores the links between exercise and pain perception, and how easily they can be manipulated

More often than not, our biggest adventures are nothing like we expect them to be—in the best of ways

After half a century of confusion, researchers have a new perspective on the transition from "aerobic" to "anaerobic" exercise

When you stop breathing, oxygen flowing to your brain actually increases—at least for a while

When it comes to big purchases like skis and bikes, many of us are punching above or below our weight. Psychology helps explain why.

A basic principle of training says you get better at the things you do most. So why does cross-training work?

Wilderness pros are trained to deal with physical injuries, but what about the psychological trauma that can result while on an expedition, from fear and stress, or from watching someone die in a fall, an avalanche, or whitewater? Australian psychologist and mountaineer Kate Baecher created a training program to equip guides and athletes with a tool kit to handle the worst mental distress we encounter when we're far from help.

To pick their two-hour marathon team, researchers tested some of the greatest runners on the planet. Now they're revealing what they found.

Fatigue, writes our columnist, comes in two very different flavors, and fixing each requires a completely different approach

The marine biologist has become a leading voice in the movement by deftly communicating what few people understand: that cleaning up the planet requires a commitment to social justice

It was a roller coaster of a summer for Alaska's most controversial extraction project. In July, it looked all but certain that the salmon-threatening proposal would get its first federal permit. But then things took a surprising turn.

You don’t need an elaborate workout plan to get the most out of your resistance workout; you just need to tune into how you feel

Carbon offsets are confusing, and many people wonder how—or if—they even work. Hoping to find a more guilt-free way to travel, frequent flier Tim Neville heads to the ranchlands of Montana to see what an offset looks like on the ground. Hint: it involves cows.

A new review sifts through the evidence for and against hiking with poles

A new study suggests that slow-twitch runners can handle higher mileage than fast-twitch runners before showing signs of overtraining

According to Chris Watson, the man behind your favorite wildlife soundtracks, we're just becoming better listeners

These maps are packed with information about current conditions. All you need to know is how to interpret them.

Biology suggests that decades of running should invariably blow out your knees. Scientists are trying to understand why that doesn’t happen.

Wim Hof's teachings about breath work and the health benefits of cold plunges have attracted millions of followers who swear it has cured everything from depression to diabetes and makes them happier and stronger. Our writer traveled to Iceland (naturally) for a deep dive with the man and his methods.

Even compared to athletes from other sports, endurance athletes have a unique relationship with discomfort

The craft beer revolution turned the tall cousin of cannabis into a breakout ingredient, infusing your brew with flavors and aromas that range from stone fruit to barrel oak. Christopher Solomon hits the road to understand why hop madness isn’t over yet—and why brewers and plant breeders are always on the prowl for the next big thing.

In a new era of menacing blazes, there are lessons to be learned from the people who stay and defend their properties

Journalist James Nestor explains how humans started breathing wrong—and why relearning this lost art is so transformative

A new study asked coaches to rank the most economical runners after watching video footage. It didn't go well.

Experienced runners tend to match their breath and stride patterns, but trying to do it deliberately may backfire

The disruptions of 2020 mean that there’s an unusually large crop of endurance-related books hitting shelves this fall

A serious exploration of a topic that a lot of people don't take seriously

A new analysis casts doubt on the idea that people are born as "responders" or "non-responders" for training in thin air

With stormchasing tours more popular than ever, our writer set out to discover why this risky pastime is once again taking off

Our Sweat Science columnist takes efficiency very seriously in the backcountry. Here are his secrets for a flawless canoe trip.

A new study suggests that strength training is more important than electrolytes for preventing cramps

The ins and outs of staying clean (and safe) at camp

Should all your training be hard? Do you need to stretch? We've got answers.

It’s the one training metric virtually all runners track, but running scientists think we can do better

In her new book, 'Superman's Not Coming,' the activist gives a lesson in community engagement and warns that we shouldn't expect the government to save us

There are those that help you see and those that help you be seen. Here's the difference—and how to buy the ones you need.

The marine biologist wants us all to start asking a new question: What does the future look like if we get it right?

With a little help from technology, Joshua Cheptegei took down the 5,000-meter world record in Monaco last week

For more than three decades, Paul Knapp Jr. has taken travelers out into the Caribbean Sea to hear humpback whales. Now seismic blasts threaten to silence their songs.

After a controversial Australian study's negative findings about low-carb, high-fat diets, scientists made adjustments and ran the study again

Science says the HoverGlide reduces vertical forces by more than 80 percent. But what does it actually feel like?

Updated guidelines write a prescription for exercise that may be just as important as traditional cancer treatments for maintaining—and regaining—your health

After an exhaustive search of the literature, researchers conclude that, well, it's complicated

In 'The Next Great Migration,' journalist Sonia Shah explores the hidden history of human and animal movement

The continent has entered its long, dark night, but just over the horizon is the question of how to make sure it stays free of COVID-19 once it reopens in August

When the going gets tough, which sensation actually slows you down?

From pizza to ultramarathons, what's the best way to chill out?

Beat back summer-vacation boredom with these seven games for the family

The ability to sustain a high rate of energy burn for a prolonged period of time may help ward off cancer

The pandemic is prompting activity-tracking companies to pivot from personal to public health

New research says yes. Fortunately, there's something we can do about it.

These items will keep you comfortable and protected while you tend to your flowers and veggies

The hotter it is, the closer we come to the ever elusive goal of besting the horse—which supports the evolutionary "born to run" hypothesis

Three new studies explore iron patches, injections, and dose frequency

Sweaty workouts do enhance your endurance, according to a new theory, but it may take longer and function differently than previously thought

A new aerodynamic analysis runs the numbers on exactly where to run when you’re behind someone else

Between a global pandemic, protests against police brutality, and unprecedented environmental rollbacks, a lifelong asthmatic reflects on how 2020 is the year we must come to terms with the tenuous nature of this simple act—and why ensuring our fragile future begins with protecting our air

Understanding the interface between humankind and wildlife is essential to averting infectious-disease outbreaks. We can't afford to ignore it anymore.

Trying to improve your sleep quality? Get back to nature.

A new study uses the training data you upload to sites like Strava to estimate the "critical speed" that determines your race performance

Spanish-speaking guides call the drug "levanta muertos" for the way it "brings life to a dead person"

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

When excruciating ankle pain threatened to sideline her ski season, one of our hard-charging editors tried Lazarus Naturals' CBD balm as a last resort. It worked—even though she still doesn't know how.

From a young age, the ocean provided relief from mental illness, something I've been unable to replicate with any other form of nature. It turns out, there's a science behind why some people prefer water.

Emily B. Martin's new novel, 'Sunshield,' is inspired by American landscapes and explores how individuals can impact their environment

Maybe the debilitating effects of chronic overtraining syndrome are in your muscles after all, not your head or your hormones

A group of eight researchers from China just summited the mountain with the sole mission of getting the most accurate measurement to date of the world's tallest peak

Doctors take an oath to do no harm. But in her book, 'Sex Matters,' emergency medicine physician Alyson McGregor explains how doctors are unintentionally harming women by practicing a model of medicine based on men.

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

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

They're not more tired than the rest of us, according to a new study—they're just better at sleeping

Yes, it tastes great, but it's not a drug

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

In his new book, 'The Wedge,' bestselling author Scott Carney travels the world to investigate the surprisingly effective methods humans have developed to rewire our brains and control our response to stress. And it all starts with taming fear.

Wouldn't it be great if there was a technique that would allow us to vanquish fear and beat back stress? 

New research on mental fatigue suggests that even elite runners perform worse after a 45-minute computer task

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.