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After a record-breaking year, the 28-year-old American ski racer sits down to talk success, failure, family, and the future with her mom, Eileen Shiffrin

The most versatile runner on the planet gave us a marathon debut for the ages

The guidelines for returning to training after giving birth are “vague and inconsistent.” That’s no surprise.

This summer Courtney Dauwalter made history, becoming the first athlete to win the three biggest races in ultrarunning in the same year: the Hardrock 100, the Ultra-Trail du Mont Blanc, and the Western States Endurance Run. What’s her secret?

After a devastating near miss in 2019, Jenny Hoffman shattered the coast-to-coast fastest known time

Following significant athlete pushback, USA Track & Field moved the race’s start time earlier. But the governing body also needs to offer Trials host cities a better deal to prevent similar issues in the future. 

When you’re one of the greatest skiers of all time, there are some things you only say to the person you trust most in the world

Doyle set a speed record on the AT 50 years ago, long before YouTubers and partying twentysomethings had flooded the iconic trail. Through his Appalachian Trail Institute, which he's run since 1989, he’s still trying to convert a new generation of thru-hikers to his personal philosophy of what the trail should be.

Those who pursue the craziest endurance races on the planet do it for reasons that make perfect sense

The French steep skiing icon died while descending Puntiagado Volcano in Chile with Chilean IFMGA Guide Juan Señoret

But Sifan Hassan just might be

After two new marathon world records, it’s time to reevaluate why marathoners are getting faster and what comes next

‘Limits’ makes fun of the challenge of landing a professional contract in a way that will delight fans and non-fans alike

A rigorous new study finds small changes in heart rate and subjective feelings of recovery. Do they matter?

A new study of athletic career trajectories finds that early success is less meaningful than you’d think

Due to stack height regulations, pros can’t race in the new Adizero Prime X. But it’s fair game for amateur runners—we asked a few of them how they’d feel about competing in it.

�����ԹϺ���’s ethics columnist weighs in

We caught up with Lindsey Vonn to chat about recovery, sleep, and who she’s watching this winter

Researchers assess the potential benefits—and downsides—of the hundreds of bioactive compounds in your morning brew

The most prolific athlete at this year’s World Championships was also the most fun to watch

You say yes, of course. But what about those other wild opportunities that you’re not so sure about?

The dissolution of the Pac-12 is a reminder that Olympic sports like running need to find a new business model. And that’s not such a bad thing.   

When illness or injury forces you to take a complete break, researchers have some ideas on how to limit the fall-out

Sports scientists weigh in on the trends that will keep the PRs coming

Legalizing some performance-enhancing drugs might result in less cheating, but at what cost?

Here's why you need to monitor your water intake

Special Counsel Jack Smith loves endurance sports, and we have the skinny on his multisport passion

McKayla Bower’s biggest concern: the way she’ll be welcomed—or not—in countries openly hostile to LGBTQ+ people

Houlihan has been throwing down impressive times this summer, despite being suspended from her sport

DiGiulian just wrote her memoir while running her own business, making movies, and chasing tough climbs. Here's how she balances it all.

The cyclist has become a focal point for the debate about trans women in sport

To optimize your health or supercharge your training, you sometimes need to look beyond the lab

A paltry few Americans race the Tour de France these days—despite the fact that junior bike racing is booming on this side of the Atlantic. A new plan aims to shift America’s Tour participation into high gear.

The surfer’s agoraphobia was preventing him from living the life he wanted, so he reached out to his wave-riding community for help

Records are falling and times are dropping. Is it the shoes, or something else?

The American ultrarunning phenom took home the women’s title, while British runner Tom Evans won the men’s event

She knew she was going to be the best triathlete in the world one day. But first she had to learn to swim.

Refugee Dominic Lobalu has proven that he can beat the best runners in the world. But will that be enough to get him to the World Championships? 

Austin Howell soloed harder and more often than almost anyone else in the country, documenting his exploits on Instagram and a podcast. But behind the scenes his mental health was faltering.

In honor of Juneteenth, we’d like to shout out some of the most impressive and impactful leaders of color working to make the outdoors more inclusive for all

The latest research suggests that muscle oxygen can detect exercise thresholds, with no blood required

When she broke her neck in a crash, the mountain biker was forced to face what she’d been unwilling to admit

We know meditation and visualization exercises benefit our mental health. Could they also support our physical bodies?

We’ve been sharing running advice for over 40 years. Here are the 30 best tips, tricks, and ideas we’ve ever shared, your one-stop shop for all things running.

Wildfire seasons are getting worse. The increase in smoke is harming heart, lung, brain, and skin health.

When fitness influencer William Goodge ran across the country to raise money for charity, his feat received unprecedented scrutiny from hardcore running fans

Physicians and researchers weigh in on the benefits and disadvantages of having hypermobile joints

It’s a bit simpler than you might think

A certified personal trainer breaks down what you actually need to know about lifting and running

Plyometrics can make you a more efficient runner, and it turns out they don’t need to be complicated or risky

The American, who attained legend status for his 1963 ascent of the West Ridge, died at age 93

In an excerpt from her forthcoming book, ‘Up to Speed: The Groundbreaking Science of Women Athletes,’ longtime �����ԹϺ��� contributor Christine Yu argues that female athletes deserve their own benchmarks for athletic success.

You'll want to take note of these errors before your next workout

A dietitian explains why you can't seem to stop snacking on your days off. It's also completely normal.

Collin Chartier recorded a positive test in February

The temperature of your room may be more essential than you may think

Despite being an accomplished mountain athlete, she struggled with her body image. But by imagining how younger girls would see her story, she found the strength to accept herself.

Plus, how you can test the range of motion of this often-forgotten joint

Officials say Nobis died in a Cedar City, Utah jail cell

Training, tools, and techniques vary. What you need to know to choose a physical therapist versus a chiropractor.

More than 50 years ago, this 20-year-old became the first woman to officially run the Boston Marathon, even while organizers tried to pull her off the course. She finished—and started a movement.

These exercises will improve your posture, balance, and stability

Cyclists, snowboarders, and trail runners unite to discuss their journeys to climate action in this three-part series, which is playing on �����ԹϺ��� Watch now

There’s plenty of hype about ways of boosting your respiratory system. Some—but not all—of it is real, according to a new review.

You need flexibility and stability to train effectively. That starts in your toes.

My sport is a huge part of my identity, but I’m not as good as I hoped I’d be. What if this is my peak? 

After over a year of effort, Sharma clipped the chains on Sleeping Lion, his second 5.15c. We caught up with Sharma to hear more about his process, training, and how he’s managed to balance his family, career, and climbing goals.

Why the world's greatest marathoner still needs to win a hilly marathon to cement his legacy

Researchers use isotope tracers to accurately calculate calorie burn and other parameters during a grueling full-day ride

After suffering a brain injury in a freak crash, the bike racer learned that the best way to manage his challenges was to face them everyday

During a climbing trip in Greece, the adaptive athlete saw the possibility for shared experiences that can truly change our way of thinking

Since Linden began her career, there’s been a dramatic shift in how professional runners promote and present themselves to the world. We caught up with her about her new podcast, the expansion of running media, and how she decides whether to fire off a spicy tweet.  

Athletes of all levels have considered whether their choice of birth control might influence how they train, recover, and perform. But the answer is complicated. Here’s what you need to know.

Katie Burrell has developed a brand around teaching winter-sports experts and strivers to chill out and share a laugh. Her upcoming film, ‘Weak Layers,’ revives the old party-hard ski comedy—with women at the center of the action.

Experts weigh in on whether your period ought to have a say in your workouts

After a devastating accident, the mountain biker realized that getting back on the trail meant accepting discomfort and unpredictability

By enforcing stringent rules on the video footage creators can use from their events, USA Track and Field might be undermining its own mission

Has Maurten finally figured out how to harness the power of baking soda without paying the gastrointestinal price?

Last month the company discontinued its Guide Built program, letting go of over 20 athletes in the process. Who’s left? Influencers.

Double threshold days and lactate meters have propelled Jakob Ingebrigtsen and others to the top. Should the rest of us follow suit?