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As sensor technology improves and becomes more practical, so does the ability of coaches and athletes to collect—and react to—more nuanced data.

Performance wear that makes you the canvas

Want to undo the damage of your desk job in 10 minutes? Crawl like a kid and start spinning like a Sufi monk.

Take the guesswork out of head injuries

I just had surgery after a skiing accident, and my wrist is in a cast for several weeks. What can I do to avoid losing strength while I can't move it?

Traveling for race day? A well-stocked dopp kit is your secret weapon.

Yoga just entered the digital age.

Sitting is the new smoking—but the cure isn’t just more standing

Make those nebulous resolutions last by turning them into habits. The key? The right reward.

Fact-checking trusted training maxims

The Swedish car company has partnered with outdoor gear maker POC to make helmets that communicate with cars. The goal: to end collisions between bikes and drivers.

Sign up for a midnight fun run on New Year's Eve—and kick ass. Here's how.

How a man wrongly convicted for murder spent nearly a decade in prison—and emerged as a fitness guru.

What's around your wrist can affect how much is in your wallet

Ill-chosen goals put you at risk of injury and burnout. Here's how to avoid that fate in seven easy steps.

Examining the perpetual youth and singular talent of surfing's king

My heart feels like it skips a beat every once in a while, especially during exercise. Is this something I should get checked out?

Yes, they're great for reducing soreness, but they could also be masking more serious muscular imbalances.

Advanced screening can reduce the likelihood of sudden cardiac arrest, the most common cause of death among athletes. So why is it so controversial?

5 must-have tools to rebound from marathon season

I know that proper form while I'm working out is important, but what about my posture the rest of the day—does that really impact my fitness level?

This ergonomist has a mission: to design an office that's scientifically proven to boost your fitness, mental health, and productivity.

Or is another mysterious condition to blame for deaths during the swim leg? A new report unveils a long-misunderstood killer.

We don't know if the biohacking craze is full of snake-oil salesmen or prophets. Probably a little of both.

Renowned physical therapist Kelly Starrett lays out movement standards for runners. Meet them, and you'll stay out of his office. Don't meet them, and you shouldn't be running.

Convince the computer you're clean and you get the Clean Protocol program's seal of approval. Any takers?

Face it, most of us aren't complete athletes. We lack the strength to make us fit, and we follow cultlike exercise programs. But there is a cure: Listen to renegade coach Mark Rippetoe, grab a barbell, and get back to basics.

For when an evening hike turns into a 20-mile epic

Health-and-fitness publications often takes liberties (gasp!) with scientific studies. Here's why you shouldn't believe everything you read—and how to separate the facts from the slough.

A handful of years ago Rachel Brathen was a cigarette-smoking, rebellious teen in Sweden. Then she moved to Costa Rica, found yoga, booted up Instagram, and became a yoga celebrity—if there is such a thing.

Or is the test they give me at the shoe store good enough?

The marathoner runs on routine—and strawberry cheesecake.

Throw away your ice packs and ibuprofen if you want to recover right.

Long flights and car trips wreak havoc on my body. How can I reduce the stress of travel and keep up with my current exercise routine?

Introducing the first helmet on the market that measures your heart rate.

These stripes could keep you from becoming shark bait

As patients jettison insurance plans for concierge care, some are looking to optimize their fitness level along with their health.

The 33-year-old triathlete is American's best hope to reclaim Ironman Kona.

Challenge your friends to a grueling drill-based challenge, then whoop their butts.

Sure, running five minutes a day will help you live longer, but it's not going to get you in shape—or even scrape the surface of your potential.

I'd love to haul my kids up the railings to Half Dome, but don't want to risk accidents—or turning them off of hiking forever. How can we have fun while staying safe in the national park?

Anxiety, depression, obesity—kids are increasingly becoming unhappy and unhealthy. But there is a pill-free solution: outdoor play.

With a series of impressive 100-mile wins under his belt and perhaps the most fitting name ever bestowed upon a shoe-salesman-slash-ultrarunner, Mike Foote seems to be doing everything right.

Think you're ready for the world's longest stand-up paddleboard race? We'll be the judge.

Nathan’s Zeal race vest packs a lot of hydration into one small, efficient must-have.

Should I be concerned about Vibrio vulnificus cases reported in Florida and Maryland?

Sometimes when I'm in the middle of a really hard workout, it tastes like I'm sucking on metal. Here's why.

Your legs are your foundation. With this quick-paced routine, you'll build the explosiveness and durability to conquer any mountain.

Some people might be built for speed and others for distance, but everyone benefits from running faster. This is how you do it.

No, don't stop using it. But you need to go beyond SPF and add more protection to your arsenal.

I thought that starchy foods aren't good for you—why do I keep reading about the health benefits of this certain type?

Some plan trips in advance; others let the current carry them. For Amy Ragsdale, traveling with risk takers like herself has helped her trust the process of exploring without a full map, rather than fight it.

You'll never get close to the ultrarunner's 90-plus podium finishes, but his rules will help you run your best race.

In The Art of Competition, Ironman-turned-author Mark Allen gives insight into the thoughts that helped him race his fastest while living to the fullest.

Ultrarunner Adam Campbell says he was zapped during the Hardrock 100 trail race this month, but still managed to finish in third place. How is that possible?

Two brothers and a sister—whose parents are endurance athletes—attempted to swim the English Channel together this month. Does the family factor add any advantage?

Cycling is known for being low-impact. But does that mean it's bad for your bones?

The most dangerous threat you'll face while working out this summer? The heat. Here's how to beat it.

Having hiked more than 10,000 miles on epic long-distance trails, Liz Thomas is a true expert when it comes to battling blisters.

1,800 CrossFit gyms already offer programs for kids. Should they?

There's more to life than chasing definition in certain muscle groups. Maintaining a healthy weight, for instance.

The "eight-percent rule" ignores the power exercise has to counter time spent on your butt.

Hardrock veteran Kirk Apt has logged 2,010 miles and 680,000 feet of vertical ascent through the San Juan Mountains since 2000. Here's how.

How should I schedule giving blood around my training schedule?

Top shoe brands are racing to enter the super-cushioned fray. We review 2014’s corpulent shoe crop.

Sometimes you have to take your own advice—or suck it up and eat crow.

Three plane fuselages in a Montana river might seem like a problem, but there’s more to the accident than meets the eye.

You’re likely to face some hot races, or at least some hot training days, this summer. So I asked five elite ultramarathoners what gear they recommend to keep cool during the hottest months of the year. Below, I’ve listed five gear hacks, tips, and products these men use to battle…

Stylish? Maybe. Functional? Not really.

The roads are dangerous. But the real hate happens on social media. And it's both disgusting and scary.

A little goes a long way.

Taking your kids to an ultramarathon can be a distraction from the aches and pains of running long distances

Bet you didn’t think this would come up in your fitness regimen, but your esophagus needs love during training, too. Intense exercise can contribute to heartburn and gastroesophageal reflux disorder (GERD), and there’s a good chance that ramping up your routine may be causing your symptoms, says…

If you never have to worry about actually performing at the top of your game in the heat, then by all means head inside to the treadmill, says Chris Jordan, creator of the 7-Minute Workout and director of exercise physiology at Johnson & Johnson’s Human Performance Institute.

What’s one thing college kids and health nuts apparently have in common? Butt chugging. And a total lack of common sense.

Think of those tough spots as badges of honor! “Callus formation is a natural response to friction and pressure,” says podiatrist Megan Leahy of the Illinois Bone and Joint Institute. “Because runners obviously take more steps than non-runners, calluses may occur more readily.” Calluses can be harmless,…

With a little help from Make-A-Wish, Yosemite’s first honorary park ranger earns his keep and proves his strength

Keep your four-legged adventure companion cool in the heat this summer.

A few weeks before my first “half distance” triathlon—which consisted of 70.3 total miles, including a half marathon at the end—I slipped into a brand new pair of sneakers, intent on breaking them in during my next few practice sessions.  They’re triathlon-specific shoes, outfitted with elastic bungee laces and a…

This may not be the answer you’re looking for, but it’s the truth: The most effective way to get back into shape (and stay that way) isn’t by just doing one magic move over and over. The good news? You may not have to work out more than or…