An otherwise fit 42-year-old, I had the range of motion of a sycamore.

The entrepreneur believes that biohacking can rocket your body and mind to peak performance. His Bulletproof diet zoomed into the mainstream, his Bullet-proof coffee has everyone quaffing butter, and his Bulletproof books fly off the shelves. Now Bulletproof Labs is out to hack, well, everything.

She's one of the world's best cyclists, and she has her routine dialed

The tools that help her train for one of running's biggest marathons

When in doubt, reach for these science-backed ingredients

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

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

It's nature's perfect post-workout meal, and don't let anyone tell you otherwise

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

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

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

Eight life lessons from one of America's best marathoners

Even superstar Olympians need some help staying fresh through the competition

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

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

Matt Thomas was a world-class kayaker who got paralyzed in a mountain-bike accident. His friend Joe Jackson moved in for a demanding stint as a caregiver. Outdoor sports were off the table, of course—until Thomas heard about paragliding.

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.

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

The most important rules to grow your body and mind

Continuing the tradition of Tom Morgan's signature smooth feel, only 50 of these new rods have been made. Without even casting it, I know it's amazing.

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

Ten pro tips for reaching—and maintaining—peak performance

Artificial intelligence is making its way into fitness apps

A master list of the most worthwhile nutrition advice we've ever written

Get stronger faster with the right post-workout tools.  (Courtesy Trigger Point) Trigger Point STK Contour Roller ($30) Nine wheels give the Trigger Point STK Contour roller a range of massaging power. And the main bar is flexible, allowing you to wrap it around spent muscles for better relief and recovery.

Stuff you can add to your truck to make it better for off-road travel

The new Watch is a more sophisticated fitness tracker than its predecessor, with an updated operating system, upgraded hardware, and cellular connectivity. But will it be enough to win over athletes?

Why you can cut your mileage in half and still come out ahead

After an injury to his hand, climber Bernd Zangerl tries one of the hardest routes of his life, Into the Sun.

To start with, long steady rides are a boring waste of time, power meters are both absolutely vital and extraneous bullshit, and you can get faster without training like a lifeless automaton

Our favorite free-range, protein-packed, delicious snacks

The science on how, or even if, these powders, capsules, and goos really help remains inconclusive. But many athletes believe the placebo effect alone may be enough to nudge them to victory.

The focus-demanding sport could affect the brain more deeply than we know

Your simple guide to using the supplement the right way

Streamline your endurance-training data for less stress and better results

Your mental checklist to decide if you really need to take a rest day or if you’re better off just toughing it out

Tailor your training to the race you're going to run

New tracking chips embedded in carbon frames can help riders recover pilfered goods

Quinoa, bananas, and peanut butter are recurring characters, but add a little more flavor (and nutrition) to the plot by tossing in these surprising purchases

In a sport plagued by career-ending injuries, somehow Walmsley hasn’t been hurt once during his phenomenal stretch of success

Mastering ground movement—crawling, rolling, and standing—is a vitally important, often overlooked aspect of becoming a well-rounded, injury-free mountain athlete

This summer in Bermuda, the Australian-born sailor will lead Oracle Team USA’s bid to retain the oldest trophy in international sports. The 37-year-old’s secret to staying on top? Stepping away from the boat.

Your expert-backed plan to kick one of running’s most nagging injuries

There's nothing quite like breaking up the workday with a run, but logistics can make it tough to pull off. Here's how to execute flawlessly.

After most MCL and ACL surgeries, doctors focus on treating and rehabbing the soft-tissue, while almost completely ignoring motor patterns and biomechanics

For an athlete, being injured is often harder psychologically than it is physically. But the elites have developed a few key tools to help stay happy and sane while healing.

Four of the sport's best on what they've learned from taking time off and coming back

This three-minute routine will make you faster and stronger and help keep you injury-free

Remember to take care of yourself after your big day

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

Your next recovery meal comes in a bowl of power ramen

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.

With peak season in full swing, High Fives Foundation released this safety documentary explaining what can go wrong in the mountains.

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

Want to perform like a pro, even with the years piling up? Nick Heil got the deluxe treatment at Exos, a cutting-edge outfit that works with NFL players and soccer stars. He came out slimmer, stronger, and more focused—the perfect upgrade for anybody, at any age, who plays hard in the outdoors.

The key to peak performance: take better care of yourself

Meeting up with your friends for a post-run drink could do a lot more good than you realize

Fitness gains don’t occur during workouts, they occur after. Recovering while stressed could throw a serious wrench into your training.

After a bumpy year filled with injury, illness, and a ton of ups and downs, Canadian triathlete Kirsten Sweetland has figured out success

Gear to get you back on the horse

Stay fueled without feeling stuffed with one of these quick-and-easy options

There's more to life than drinking smoothies after every run. Here are 10 great options to help you rebuild after tough workouts.

For the price of a few cups of coffee, the Boulder company is helping offset the cost of Olympic dreams

The best way to avoid hangover pain is to drink sensibly. But if you can’t follow that rule, we tested the most recent products to take a shot at relief.

Researchers say there is indeed too much of a good thing, and it’s killing your athletic potential

Most of us will spend a third of our adult lives at a desk. Make the most of that time with these six workout essentials and transform your desk from a shackle into an efficient, flab-busting fitness tool.

Brewtein is designed to help athletes relax after a hard gym session while aiding muscle recovery

Queen of the road Megan Guarnier has developed tremendous physical fitness and psychological fortitude—now she’s after a medal at Rio. Here's how she got there.

These products claim to tone muscles and speed workout recovery. But the jury is out as to whether they’re worth the hefty price tag.

Unpacking the buzz around the latest performance food

The secrets behind the 40-year old Catalan ultrarunner’s winning streak

Keep it fresh—and save money—with homemade fuel

Here's how world-class athletes do the trickiest meal of the day