When CEO Greg Glassman retired after making inflammatory comments about George Floyd, many in the fitness community weren't surprised. But where the popular fitness business goes from here is anyone's guess.

A decade after 'Born to Run' made them famous, anthropologists take another look

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

'Working Woman's Trans BC Enduro' follows two cyclists as they prepare for a six-day mountain-bike race in the Kootenay Range

A professional climber dishes her secret sauce to mastering this dicey move

With the right approach, you can come out of summer running stronger and fitter 

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

You can do more with this simple training tool than you think

The cycling world has turned its eye toward an obscure challenge called Everesting

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

How Colorado-based mountaineer Erin Parisi is preparing to bag all seven peaks

To perform the ultimate lower-body move, you need to follow this progression

Miss your go-to barre studio or lifting weights at the gym? Bring some structure into your living-room workouts with these videos that are Outside tested and approved.

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

Most endurance events are canceled for the summer, but Spartan Race will hold its first event since the pandemic from June 13 to 14 in Florida

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

Inversions might seem intimidating at first, but the handstand pose is an attainable goal for any active person with the right mindset

How Sarah Herron found herself in the mountains, then helped others do the same

The Leadville 100 is an iconic mountain-bike event that puts racers through a course covering 100 miles and 12,000 feet of elevation change

Beth Rodden opens up about her decades-long struggle with her body and climbing

Anna Levesque uses yoga to slow down and fight self-doubt

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

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.

Build strength, train cardio, and break a sweat at home with minimal equipment

New research suggests that the lactate produced by hard interval workouts alters the hormones that determine your appetite

So-called "flush drownings" lack an obvious cause like getting trapped underwater. Researchers now believe water temperature is a key factor.

Sean MacCormac says the keys to his success are ballet and breathing through the panic

Simple steps every runner can take to keep things fresh, build momentum, and reach goals.

Tricks to making your home workout as easy—and productive—as possible

8 minimalist strength exercises from alpinist Anna Pfaff, for when you're waiting out the weather—or a pandemic

Build explosive power with this simple routine from professional athlete Braydon Bringhurst

Train like a pro with these safe and simple hang-board workouts

Develop explosive power and speed by training muscles to produce maximum force in the shortest possible time with these plyometric exercises

Some sports scientists believe that a measure called the "acute-to-chronic workload ratio" can predict your risk of injury. But critics aren't so sure.

Jeremiah Bishop is still riding strong and staying healthy without a spring race schedule

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

'Session with the Best' showcases two top climbers, Sean Bailey and Nathaniel Coleman, as they practice at the USA Climbing Training Center

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

This world champion says you can get into surf shape without ever catching a wave

Build your balance with this essential workout—no beam necessary

Nobody gets a free pass to sit all day, but new research on how sitting affects your arteries offers some encouraging news for cyclists

If you're cooped up indoors and looking to move your body, try one of these routines

Russian women got slower after the Athlete Biological Passport was introduced in 2012. Anti-doping officials think they know why.

Tinker Juarez continues to compete against—and beat—athletes half his age

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

The ice climber, kayaker, and paraglider continues to explore uncharted territories into his fifties

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

Angela Madsen, a three-time Paralympic rower, has a new goal: becoming the oldest woman to row from Los Angeles to Hawaii

Humans were born to dive, according to some scientists, and that fact helps us thrive at high altitudes

Follow this routine to keep your hips happy, reduce pain, improve athletic performance, and prevent further injury

A wilderness medicine expert and former AT thru-hiker shares her tips for tackling a long-distance backpacking trip

Pretty much every elite endurance athlete trains in mountain air or the altitude-tent equivalent. But a few scientists think they're wasting their time and money.

For starters, there's hesitancy about the confluence of drug testing and unregulated products

There are more ways to mess up the common move than you think. This guide will help you progress into a flawless lunge.

Patricia Baker established multiple track-cycling records in her age group after taking a 20-year break from racing

This exercise routine from legend Robert Killian focuses on functional strength and mobility, you can do it almost anywhere, and little to no equipment is required

Or why you don't have to get up at 4 A.M. to perform a two-hour ritual of self-care

There's at least a theoretical basis for believing in the power of CBD topicals

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

A new study finds unexpected benefits from super-short intervals with even shorter recoveries

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

Scientists are increasingly skeptical of the benefits of flexibility, but the fitness world doesn’t want to hear it

The controversial author and personal trainer shares his lessons from the outer limits of self-experimentation

Follow this yoga routine, in addition to your time on the slope, to improve and maintain your strength and flexibility all season long

Expert advice to help you recover fast, stay injury-free, and have fun in the mountains

When Rebecca Mehra tried to unplug a broken oven, she almost ended her track season—or worse

New research hands down verdicts on what to lift, how much, and how hard

Heat training has been hyped as a powerful workout enhancer, but new research sounds a note of caution

With multiple intensity zones and a unique three-sided design, the new TRX Rocker recovery tool takes foam rolling to the next level

Anyone who disagrees is an "obvious idiot"

Klaus Obermeyer shares some tips on work, exercise, and (of course) skiing

Researchers deploy machine learning to match running styles to the risk of different types of injury

A holistic guide to strong, healthy shoulders

To better push your limits, try swearing off some of your most familiar crutches now and then

Improving your max aerobic power may come at the cost of worse efficiency, a study finds