She's the first person to finish the Leadville Race Series and the Grand Slam of Ultrarunning in a single season

Kelly Starrett has spent more than a decade training Olympians and professional athletes

Alt meat isn't going to stay alt for long, and cattle are looking more and more like stranded assets

The theory makes sense, but actually showing that “hyperoxic training” makes you faster remains a challenge

Journalist Rowan Jacobsen discusses his controversial feature suggesting we need to reconsider our relationship with the sun and sunscreen

We have a lot of opinions about how to make the most of your pit stop, whether you're headed to or from an adventure

The global meal-replacement market is growing at nearly 7 percent annually and expected to reach $20.6 billion by 2021. But as we hack nutrition for hyperefficiency, have we evolved past the need for deliciousness?

A new study finds that your “critical speed” threshold drops in the last third of a marathon, which may explain why the distance produces so many blow-ups

The Wave Tool is a durable, pocket-size way to mobilize and keep your muscles tension-free

New research suggests that the emotion has a singular ability to lower stress and improve our overall well-being. So how do we get more of it?

No, we’re not talking about nailing the perfect Instagram story or crafting a funny Facebook post

In this episode of Moves, Santa Fe–based Railyard Fitness instructor Doug Lawder walks us through moves for stronger legs

It takes skill to have no idea what you're doing outdoors

A simple self-test zeroes in on the most efficient stride rate for your running style

Calorie counting can be a huge burden. Plus, you're probably terrible at it.

A new study looks at the effect of subtle wording changes on the performance-boosting power of motivational self-talk

Thanks to apps like Strava, dialing in a precise training plan has never been easier

The world-champion obstacle course racer has had a 20-year history with anorexia. But now she's in the process of recovering, and she has some important lessons to share.

Nine athletes share the phrases they tell themselves to reach peak performance

Experts from the Wilderness Medical Society have combed through the evidence to assess what works and what doesn’t

From summiting a mountain to going fake camping, here’s how to make the most of our favorite day of the week

Staying healthy is crucial to athletic performance, and a new analysis from the 2018 Olympics suggests some surprising defensive tactics.

Late-night calories can boost recovery and set you up for an active day. Here, a nutritionist weighs in on athletes' favorite snacks.

The cliff diver competes against athletes half his age

Can a grassroots movement of physicians convince big health care that free medicine is the way of the future?

After years of empty promises, hydration-tracking wearables are finally close to hitting the market

Kayaker Eric Jackson is still developing new tricks—and beating his kids in competitions

A lactate-munching microbe found in the poop of Boston marathoners is interesting, but that doesn’t mean you should (ahem) swallow it just yet

David Sabgir, founder of Walk with a Doc, on why exercise is 100 times better than medicine

Resistance bands offer the best bang for your buck, challenging little-used muscle groups that make a big difference

A mysterious syndrome is leaving elite athletes lethargic, depressed, and unable to get out of bed

Falls happen. From skiing to bouldering, learn how to do it safely.

Analyzing your training distribution can reveal the right balance between hard and easy workouts

The elite competitor and full-time lawyer talks to Tim Ferriss about training and nutrition

The company is growing fast, adding roughly a million users a month, and it has lofty goals to expand far beyond its old identity as a platform for logging rides and runs. Can it succeed?

The weight room doesn't have to be overwhelming. Here's everything you need for a successful lifting practice, plus a foundational total-body workout to get you started.

The mental side of soreness, the downside of ice baths, and the genetics of tendon injuries were hot topics at this year’s ACSM conference

Ecologist Chris Morgan sensed that nature had healing powers. But it wasn’t until he tried forest bathing that he understood them.

You can't force your way to healthy habits

Your head is pounding, your muscles are cramping, and your heart is racing. Then you get dizzy and the vomiting starts. Heatstroke kills thousands of people every year. This is what it feels like—and how to know when you’re in danger.

Exertional heatstroke can cause devastating damage, but it can also be treated quickly

Alyx from Railyard Fitness in Santa Fe shows us how to do three versions of the famous burpee

The days of veggie burgers that taste like cardboard are over

The tastiest nutrient-dense options for backpackers on a budget

The 44-year-old Ironman competitor wakes up early—and we mean early—and only takes one rest day a month

The breakfast staple has had a rough go of it in the last few decades. So are they good for you or not?

Now you can pay to take a midday snooze. Here's what you get for your money.

How one nonprofit is working to get more people outside through urban adventures

Often it's more important to recognize how you channel your energy than to be "on" all the time

More and more evidence suggests that nature does something essential for our mental health

Hydrogels, electrolytes, and drink frequency top the list at this year’s ACSM conference

Insights from this year’s ACSM conference on how to lift, what to eat, and how that affects endurance athletes

Alyx Walkinshaw walks us through how to do a perfect squat

The pro mountain biker recently completed a 1,000-mile trip around Arkansas in eight days

Don't be a kook. Here's a crash course in surf etiquette.

A new study of transcontinental racers pegs the digestive tract as the limiting factor in extreme feats of sustained endurance

Cal Newport, author of 'Digital Minimalism,' explains how we need to reimagine our relationship with technology

A new startup called Vast Terrain taps U.S. suppliers to make top-shelf goods

I thought most of the food I ate came from nearby—until I put that presumption to the test

How this ex-combat surgeon, ship’s doctor, fourteener hiker, and aspiring ninja stays strong

Losing 100 pounds was only the beginning. Here’s how Brianna Bernard, a personal trainer, nutrition coach, and mother, stays healthy every day. 

Rowing is a great workout but can be somewhat boring. The RW900 fixes that.

We won’t tell you what to think; we’re just here to share the latest data.

Connective tissue is notoriously slow to heal. New research suggests gelatin might help.

Energy that tastes more like a meal than a dessert

Ötillö Swimrun is a grueling race series alternating long passages of open-water swimming with rugged runs of up to 40 miles. But unlike a triathlon, there’s no biking. That’s great news for W. Hodding Carter, a former collegiate swimmer who plans to qualify for the world championship. At age 56.

Despite shadowy origins and increasingly diluted claims, the beverage has officially entered the wellness scene

Pico started running and climbing mountains ten years ago, after losing her foot to cancer

A workout to help you develop a strong and trustworthy core

Getting old doesn't have to hurt so much

Data from the last world championships suggests you shouldn’t be concerned about your foot strike, no matter how you land

Getting outside on your period can be daunting, but it doesn't have to be

For Blair Braverman, physical activity was a given—until it wasn't

We wanted to know: in the face of climate change and innovation, how will food fare? Top food experts weigh in.

Although he retired from the World Tour in 2004, Shane Dorian isn't slowing down

The thresholds that define low iron can be different for athletes compared to non-athletes

Healthy and convenient or too good to be true? Our writer sampled a dozen of the most popular brands to find out.

Silicon Valley’s latest foray into fitness tech offers a new way to measure up

This technique might just revolutionize physical therapy

Nine poses that will help mitigate and prevent persistent lower-back pain