The 2019 Trans Am bike race ended two months ago for everyone except one 78-year-old competitor

After I lost 20 pounds and my red-blood-cell count dropped to dangerous levels, doctors finally knew what the problem was. But no one knew how to fix it.

An expert's guide to sticking it out through pain and suffering

Unsurprisingly, the implications of this debate ripple far beyond the sport

Two years after his disputed back-to-back summit of the world's tallest mountain, alpinist and ultrarunner Kilian Jornet has received a permit to climb Everest again this fall. If he plans to go for another record, he's not telling people.

When Baltimore Jack died near Franklin, North Carolina, the news shook the Appalachian Trail community. Jack had left behind the real world to live on the AT, thru-hiking it seven times and helping countless others to reach their goals. To some, his choice to live off the grid was irresponsible. Others celebrated that he'd managed to break the shackles of convention. A look back on the life of an AT antihero.

John Joesph's diet is key to his longevity—both on the stage and in races

A historical analysis of world-record pacing suggests that beating your own best time can be complicated

By offering minimal prize money, the sport’s most prestigious race might be excluding the best runners

In April, alpinists David Lama, Jess Roskelley, and Hansjörg Auer went silent during a harrowing expedition in Canada. The climbing community mobilized, first for a search and then for a memorial. In the wake of the tragedy, writer Nick Heil examines the motives of cutting-edge climbers and wonders: How close should we stand to our own mortality to feel alive?

A year after groundbreaking inclusion, the on-screen slopes are back to a bro fest with 'Return to Send’er'

Yes, raw speed helps. But it isn’t everything.

This weekend, the world’s best mountain runner sets his sights on Pikes Peak

Adding World Tour events just for women is a huge step forward for professional cycling. But real change has to come from the UCI.

Alyx Walkinshaw from Railyard Fitness in Santa Fe shows us how to do seven of the best oblique exercises

The explorer’s crossing of Antarctica put him in the spotlight. His skill in presenting himself to audiences hungry for vulnerable heroes will keep him there.

Scientists debate the physiological benefits of ramping up your training intensity or your training volume

Coaches told him he was lazy, unconventional, and his DNF records were something to marvel at, yet he repeatedly found the top of the podium

When it's too hot to cook, opt for refreshing salads, noodle bowls, and smoothies

It pays off to be smart about your recovery time

Start-line nerves, finish-line beers, and lots of fast, hard miles in between aren't easy on the gut. Here's what I've learned over a decade of racing.

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

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

With big names out injured and the super-team depleted, we were treated to some top-tier bike racing

Cycling’s most infamous legend talks us through the twists and turns of the Tour with his daily podcast and exclusive updates on 'Outside'

In his long-awaited memoir, 'One-Way Ticket,' a cheater turned reformer tells all about performance-enhancing drugs, the Tour de France, and a rider he used to know named Lance

Following months of uncertainty, the most exciting marathon on U.S. soil has been upgraded to “Gold Label” status. Here’s what that means. 

For decades professional bike racing has marginalized women riders and lagged behind nearly every major sport in promoting gender equality. Retired star Iris Slappendel is changing that.

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

Here's what it takes to get yourself on top of Denali, from Salt Lake City, without a single motor

The disqualified former Tour de France winner speaks openly about doping in cycling, moving forward, and his burgeoning CBD business

The city's riding scene is unique and diverse, and the best way to dodge the infamous traffic is on two wheels

After years in the doghouse, the country’s most talented running team seems to be looking to reinvent itself

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

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

If he cheated, he deserved to be disqualified, but the bullying crossed a line

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

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

After spending days in the Arctic wilderness, running 100 miles on trail is a piece of cake

The climber fell 80 feet from a climb in North Carolina

Walmsley just bested his own time by an impressive 20 minutes

How I rediscovered the joy of trails and muddy shoes following a skin-cancer scare

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

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

The elite marathoner wants you to know that trail runners deserve our respect

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.

Five years in, the virtual cycling and running game has acquired massive investment capital, thousands of daily players, and a professional bike-racing league. The platform has changed the way we run and ride.

Cutting down on booze? Try these mocktail recipes instead.

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

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.

Don't let an overnight flight stop you from arriving at your destination well rested and ready for adventure

From plantar fasciitis to blisters, these are the top causes of foot pain for runners

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

After a crash, skier Roy Tuscany created the foundation to support other athletes who'd suffered life-changing injuries

She's the youngest person in history to climb the iconic 3,000-foot route

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

An inspiration for many, Grunewald showed that it was okay to struggle

A broken femur and other injuries forecast a long and uncertain recovery

The two brands continue their heated public spat about who uses superior ingredients, among other things

Whether you're on burly mountain ridges or buffed singletrack, these kicks have you covered

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

The history of the oldest women’s-only race is the story of progress, but also of missed opportunities

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

In 'Running to the Edge,' a new book by New York Times sports editor Matthew Futterman, we learn the fascinating backstory of Bob Larsen, the man who coached Meb to glory

A helicopter search spotted five bodies in avalanche debris

Switzerland’s supreme court has suspended the IAAF’s testosterone regulations

When you’re in your fourth decade, you’re still young enough to run a personal best. But it’s also the beginning of the end.

HBO’s ‘Real Sports with Bryant Gumbel’ gives a rare behind-the-scenes look into the professional lives of Jimmy Chin, Larry Haynes, and James Boole

Last July, then 28-year-old Alexandera Houchin won the women's Tour Divide, a 2,745-mile race from Canada to Mexico over the Continental Divide. Next on her list? The new Dirty Kanza XL, a 350-mile unsupported race across Kansas.

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.

You might not like his style, but Sir Mo gives his sport some much-needed attitude

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

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

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

Everything we're keeping an eye on at the Colorado festival and beyond