A comprehensive research review finds that "neuromuscular" gains boost your speed and efficiency

The tools and tricks the pros use to stay injury-free

Steer clear of takeout, snack foods, and grab-and-go sandwiches

Until recently, the Nike track star seemed destined for burnout. But last year in Boston, after a wave of disappointing races and a personal tragedy, she ran a record-shattering debut marathon. Will the new distance of 26.2 miles save her career?

Our columnist literally wrote the book on peak performance, but he had to reconsider everything after an unexpected battle with mental illness

Sure, eating less is the main driver of weight loss, but nailing the right amount of shut-eye each night helps too

The world’s first four-minute miler has died, but his approach to the sport should live on

With the arrival of a long-rumored drink, endurance athletes want to know

In an era of specialization, a new study argues for diversifying your interests.

The (surprisingly affordable) tools they use to build strength, power, and stability

For long-term health in endurance athletes, when you eat is nearly as important as how much you eat

Whenever we hit the road for a daylong sufferfest or weekend adventure, we stock up on these bars and gels

The author and human guinea pig asked elite performers for advice on getting better sleep. Here’s what they said.

Octogenarian Dr. Arthur De Vany, renowned for his theory of evolutionary fitness, shares his diet with Tim Ferriss

Sports psychologists weigh in on the challenges of being among the best in the world

This performance enhancer can up your game if you use it correctly

Eight life lessons from one of America's best marathoners

The surefire way to make sure you're getting the treatment you need

Don't knock 'em until you've tried 'em

Athletes have been shattering "expert" forecasts for the ultimate limits of our species for more than a century

It may be the key to happiness and sustainable performance

Gary Erickson built Clif Bar into a beloved brand the old-fashioned way—by staying true to his values

Oats, eggs, and coffee reign supreme

There were a lot of mistakes in that recent story. Let’s set the record straight.

Erin Jackson is the latest Olympic athlete to join the two-decade tradition 

Don’t overlook this crucial piece of your wardrobe

Testing the idea that you can improve your ability to eat on the run

Good fitness is about more than just powerful legs and core

Yes, curling makes the list. And no, we're not biased at all.

Evolution has made humans instinctually crave sugary, fatty, and salty foods. Here's how you can fight back.

In an exclusive excerpt from his book 'Endure,' Outside's Sweat Science columnist explores the brain's role in setting our physical limits.

All season athlete Dane Tudor knows that the key to performing out in the mountains is to train hard inside. This is his most recent film about that pursuit, No Shortcuts.

Can a controversial new form of statistical profiling weed out cheaters?

Make 2018 the year you actually follow through

And yes, avocado is a mainstay

New research finds that performance varies drastically based on the time of day

Plus, the training you can do to cure it for good

The hype around a new breed of running tech is raising the ire of biomechanists. Here's why.

In gyms around New York City, the Women's Strength Coalition is working to make the lifting community more inclusive

The pro climber on her go-to, high-tech methods for staying healthy and injury-free

These real foods deliver all the complete proteins you need to build strength and reduce the risk of injury

Build up your back muscles to gain power and prevent annoying aches

Take your workouts and results to the next level with the help of these expert-recommended (free) apps

Take 66-year-old UCI Track Masters World Championships rider Gary Hoffman, who is almost as fast as he was at age 20—when he competed to race in the Olympics

Maybe smashing objects is therapeutic. But there's only one way to find out.

It isn't the answer to all your muscle-building woes, but it is a smart nutrition option for outdoor athletes. Fact is, you likely can't get enough protein without it.

As ultra-endurance athlete and self-improvement guru Rich Roll says, "Mood follows action." In other words: Don't think. Do.

Expensive stem-cell therapies are on the rise among recreational athletes, but don’t pull out your wallet just yet

The microbes in our digestive systems can affect everything from our mental health to our weight and vulnerability to disease. So why not athletic performance? New science is set to revolutionize the way we eat, train, and live.​

In the name of citizen science, we peered inside the bellies of Outside staff—and seven elite athletes

Wondering how to ensure that your gut is healthy? We're here to answer your most pressing questions.

The ideal healthy-gut diet for performance

The high-protein, calorie- and nutrient-dense snack is a staple in our Santa Fe office. But there's more than one spread to power an adventure.

Forget training load and biomechanics. A surprising new study suggests that avoiding injury might come down to something far simpler.

*With some important caveats

The most important rules to grow your body and mind

We're not talking pills. It's all about picking foods that are naturally packed with supplements.

For years, these key players have set records and pushed boundaries

Get the formula right and you'll never have to resort to the treadmill again

The sports-nutrition market is confusing, so we created a helpful guide to show you exactly what and when to eat

Create a training plan to fit your goals, learn to shop smart, and steer clear of sneaky nutritional pitfalls with these five expert-picked apps.

Six athletes on how they elevate this dish from plain noodles to delicious, healthy bowls of endurance fuel

We published a lot of them this year. Here are the ones we loved the most.

This summer, Columbia sent Zac Efron and Dylan Efron to Glacier National Park as part of their Tested Tough series, and the guys filmed each other all the way to the top of the Continental Divide Trail.

With a few adjustments, you can minimize the “interference effect” between high mileage and your ability to build muscle

How do we know them already? Because we asked some of the brightest minds in the business.

Science is a slow-moving process. Don't fixate on bright-shiny objects at the expense of a few fundamental truths.

After several years of conflicting results, new evidence shows that endurance is at least partly in your head

You could call it a spider-man meal plan

A close look at the food and tech that has allowed humankind to climb higher, faster

Cool down, then follow this step-by-step guide to reduce your risk of injury and maximize performance

Follow the lead of elite athletes and use the science of motivation to perform at your best

One of the most neglected parts of an endurance athlete's body is also arguably the most important

At the University of Vermont, an unusual initiative wants to help students discover the benefits of well-rounded healthy living. Is it working?

Americans are spending more money than ever trying to be happy, but all signs say that we're still pretty miserable

You can tweak your workout to minimize the downsides of sucking on a tailpipe

The cofounders of the wildly popular program explain why the easiest way to get in better shape is to make healthy living a game

To get a clear picture of where research is headed, you have to look beyond the easy headlines

Plus, a case for changing the way you think about calories

A new startup wants to take sports medicine digital. Is it a good idea?