We asked four pros how they fuel for race day. We learned not to fear the beer and that sweet potato popsicles are the bomb.

Their go-to exercises to build muscle, athleticism, and strength

At the cover shoot for the May issue of Outside, we asked 10 of the most influential women in the outdoor world a handful of questions about life, success, and happiness.

At the cover shoot for the May issue of Outside, we asked 10 of the most influential women in the outdoor world a handful of questions about life, success, and happiness.

At the cover shoot for the May issue of Outside, we asked 10 of the most influential women in the outdoor world about the moments the shaped them.

At the cover shoot for the May issue of Outside, we asked 10 of the most influential women in the outdoor world a handful of questions about life, success, and happiness.

Researchers say that when Paula Radcliffe ran a world record 2:15:25 marathon in 2003, she broke the female equivalent of the two-hour marathon

The record attempt will depend as much on the runners' food and hydration strategies as their speed and stamina

It doesn't have to be all kale salads and quinoa

Six athletically inclined people—regular folks with regular jobs, just like you—divulge how much money they spend on their fitness routines

An injury forced me to begrudgingly acknowledge that sometimes the best thing you can do for your training is stop it altogether

Once Joe Stone learned to use his paralyzed body, he decided he’d race an Ironman. Then he went even bigger.

Rather than gobbling up protein from anywhere, pay close attention to how you're eating this nutrient

Ultrarunning is as tough on the mind as it is on the body, so the sport's best have developed mental strategies to reframe their darkest moments. Their techniques can help us all get more from our training.

Whether you're climbing, running, skiing, hiking, or biking, you won't excel unless you're well rested

When used correctly, it plays a crucial part in an athlete’s diet. Follow these guidelines to stay on track.

How to put in the work now to ensure that you will go for it later

What do you do when you’re addicted to adrenaline but confined to a wheelchair? So much more than people expect.

Just a few quick moves will set up your body to perform at its best in any sport and keep you injury-free while you work

There's something crucial missing from your race-day training, and it has nothing to do with mileage, time, or intervals

It goes without saying that Meagan Martin is an astonishingly talented athlete. This video from Kyle Berkompas, Meagan Martin - Motivation, displays how in order to achieve greatness, she's training harder than ever before.

These workouts will help you decide

The gear and advice you need to maximize your pre-work time

Don't sabotage your nutrition efforts with shady supermarket products masquerading as health food. Here's how to avoid the worst offenders.

It's not just about our bodies. It's also about our minds.

Your next recovery meal comes in a bowl of power ramen

You don't have to summit mountains bare-chested or meditate on a snowbank to train your body to reap the benefits of one of the world's most extreme approaches to health

A new building standard has your health and fitness in mind

Two-time gold medalist and decathlon word record holder, Ashton Eaton, is arguably the world’s greatest athlete, and we can all learn a thing or two from his routine, even if we aren’t training for the Olympics.

And you probably have it. But with a lot of work—and maybe a few therapy sessions—you can overcome it.

You’re addicted to your phone. You’re loaded down by useless stuff. And you eat like a teenager. No wonder you can’t find the time to play outside, see the world, and get in shape. Fortunately, streamlining your life—and having more fun—is easy: just do less. Here’s how.

From turtle blood to contact highs, our favorite PED "explanations," ranked

Frosting! Cookies! Peanut butter! It's all fair game during long days of racing.

This May, the world's first cannabis-infused gym will open in San Francisco, where members will be encouraged to integrate the plant into their pre- and post-workout regimen

More than a century ago, strongman Adrian Peter Schmidt published a book claiming he could get you fit with just 15 minutes of work per day. We put that claim to the test.

Our devices are increasingly taking us out of reality, even when we're in nature. Here's how to get back into it.

Last November, Conrad Anker suffered a heart attack at 20,000 feet. Did the altitude have something to do with it?

Your gels and powders and loaded with sugar, which doesn't have to be a bad thing. Here are the sugars to avoid and the ones that are OK.

In 2010, entrepreneur Jesse Itzler invited Navy SEAL David Goggins to live with him for a month, completely upending his life and fitness routine. We wondered: what habits have stuck with him?

The days may be getting longer, but weekends are few, and there are many adventures to cram in. So follow the lead of ambitious mountain towners across the West and put it all together into a multisport sufferfest.

Crunches and planks won't cut it. If you want to develop real, useful core strength, you need to work harder.

Two new books break down how sugar is killing us—and who is to blame

Watch to learn the Chassis Integrity Circuit, a four-part core workout that will translate from the gym to the mountain, building core strength and endurance.

Utah Skier Aaron Rice set out to break a world record for skiing uphill. In December, 2.5 million vertical feet later, he broke it. Along the way, he learned a few things about setting an ambitious goal and staying motivated.

What the greatest adventurers, artists, runners, and entrepreneurs prioritize throughout their day, and how to incorporate that into you life

The U.K. government recently recognized parkour as a legitimate sport, and is bringing parks to inner cities, schools, and even senior citizens. Why hasn't the U.S. gotten on board?

One of the leading labs in health and food science is under fire for shoddy research. The implications for the science community and journalists who report on the field are vast. But how much does the research matter for the average person?

Science shows us that working hard to achieve a goal may increase our sense of satisfaction. Plus: how to measure how happy you are.

The unexpected techniques and technologies that military service members and veterans are using to cope with stress and its related disorders

Proposed legislation wants to ban the word 'milk' for anything but dairy products, which got us thinking: what actually is milk?

In the exclusive clip from Kale Casey's 'Dog Power Movie', he visits Dr. Arleigh Reynolds to find out what kind of VO2 Max of these incredible dogs have.

It seems like once a week there's a new study pointing to the potential health properties of beer. We decided to investigate.

An overreliance on technology can make you slower. When it comes to training, it's time to rewind the clock and rely on our more primal instincts.

Only an insane person would embark on a seven-day, seven-continent stage race. Then again, there are a lot of crazy runners out there.

Think of MuscleSound as a fuel gauge for your body that helps optimize your diet and training plan

I always felt guilty for being a late riser. Then science told me to embrace my natural sleep patterns.

There's a ton of misinformation about how much to hydrate and when, but the basics are actually pretty simple. Here's what you need to know.

How our minds push our bodies to defy expectations, beliefs, and even our own biology—in short, to make miracles

Give your liver a break and you may gain a performance advantage, too

The widely used drug was added to the WADA list of banned substances on January 1, 2016 because of “evidence of its use by athletes with the intention of enhancing performance.”

How to raise an adventure companion who will keep up with you mile after mile

After more than 40 years as an athlete and coach, it pains me to see people latch onto fitness fads, and I want to clear a few things up

Studies have shown that more than half of us abandon our trackers after purchasing. The more effective, low-tech answer to your fitness goals? A friend.

Was it the time travelers, the jaguar people, or the song from Pocahontas? All I know is that, as my exploration of psychedelics grew from a few campout mushrooms to full-on ayahuasca ceremonies, I felt better than I ever had in my life.

Blood analysis! Fat burning! Centenarians and pockets full of bacon! All that, plus six more of the biggest fitness trends from this year.

We asked the experts how to diagnose, treat, and prevent running's most frustrating, most common injury

We spent a year picking the brains of the best performers alive about the secrets to their success. Here's what we learned.

Chris McDougall shows us how using a crosscut saw can build strength and endurance.

The healthiest items to order when you’re stuck with nothing but McDonalds or Wendy's

South African physician Tim Noakes, one of the world’s greatest sports scientists, has been preaching an ultra-low-carb, high-fat diet as the key to fitness and health. His ideas have made him a bestselling guru, but now his critics are pushing back—and as Bill Gifford reports, they’re putting his theories on trial.

Recent studies suggest that walking the webbing may boost balance, speed rehab, and keep your knees injury-free

Matt Stutzman was born without arms. The lessons he learned were hard and sometimes unfair, but his perseverance and drive allowed him to become one of the premier archers on the U.S. team.

A new study found that our kids are among the least fit in the world—and our unequal income distribution likely has something to do with it

Dog Power Movie explores the movement and follows Team USA captain Kale Casey's journey from beginner to pro.

A growing body of research says that giving thanks is beneficial for health and performance

This year’s Dirty Dozen will raise money for Danny Chew, the event’s longtime coordinator and guiding spirit, after a bike accident left him paralyzed

Tracking HRV has emerged as one of the best ways to quantify recovery. But it’s also one of the most misunderstood and misused fitness tools around.

'Wild Women of the Wasatch' is a series that shows women of all backgrounds finding happiness in the mountains.