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

Scientists reconsider the assumption that it only helps strength and power athletes

Because of all the gear you buy for your rides, your helmet may be the most important

These joints are essential for all of your outdoor activities. These movements will keep them functional and healthy.

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

A personal trainer shares seven exercises that focus on your biceps, triceps, and shoulders

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

Researchers look back on the lessons from 25 years of “live high, train low”

This workout will help you incorporate this critical movement pattern into your strength-training regimen

First there was altitude training. Then it was heat training. Now it’s… pollution training?

More money means a greater risk for corruption, but professional running needs something to shake up the status quo

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

This unlikely combination may just improve your flexibility and performance

New data finds that endurance- or speed-oriented muscle fibers don’t determine how you respond to strength training

Collin Chartier recorded a positive test in February

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

In-race data collected during the world championships sheds new light on how top endurance athletes avoid overheating

Dogs join their humans in all kinds of outdoor pursuits. Shouldn’t they fuel the same way we do?

These exercises will improve your posture, balance, and stability

After the worst of your injury is behind you, these movements will help you return to your active life with confidence

Action plans and inspiration for you to get in better shape

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.

A new review weighs the evidence that strength and training adaptations vary across the phases of the menstrual cycle

Why your decades-old recovery regimen may no longer make the cut

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

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.

What’s the difference between overcoming hardship and succumbing to it? Grit.

It's simple—but so challenging

So-called “augmented feedback” can offer both information and motivation. A new study tries to separate the effects.

Here's how to strengthen and stretch an area of the shoulder that can be difficult to exercise but easy to injure

While trying to qualify for an English Channel crossing, swimmers swallowed ingestible thermometers. They got really cold.

Age may be just a number—but so is your weekly mileage

It's the hot new recovery tool. Here’s what to keep in mind when using one, according to physical therapists.

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

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

Researchers test the assumption that top athletes are more sensitive to internal cues, with surprising results

A new study tests the idea that, with the right building blocks, connective tissue can repair itself after all

Internationally acclaimed coach and author Brad Stulberg wants runners to love the process, seek community, laugh at themselves, and stay flexible

A big-data analysis of Strava training logs estimates the slowdown for marathoners who miss a week or more

A new model breaks down the ability to fight through adversity into its constituent parts

Army researchers assess the evidence on what makes you stronger, and speculate about new approaches that might work even better

I'm a seasoned outdoorsperson but I've never lifted weights. How hard could it be?

The recovery revolution will continue to boom, as will our collective enthusiasm for women’s sports

A head-to-head lab showdown finds that power and efficiency depend on your preferred running surface

The sports bras, leggings, and sneakers that seriously changed my life

Moving from long to short efforts during a workout maximizes the training stimulus

The downside of veggies, the upside of emptying your colon, and more

New research finds that, all else being equal, runners don’t have more gastrointestinal problems than cyclists

A simple sequence of stretches that all but ensure a proper night’s rest

New research explores the differences between active and inactive twins, and why such pairs are so rare

Replacing lost salt is a pillar of sports nutrition, but new research suggests more isn’t always better

Try this sequence to counteract physical effects of desk work and to reset your mind

Use these moves to build shoulder strength and avoid preventable injuries during day-to-day life and training

Is your lower back out of whack? Yoga can help you find relief.

Researchers in Japan try to figure out which miles matter most for long-distance runners

Try this brief sequence to relieve stress

Elite running coaches weigh in on what it means to be talented and how they predict who will run fastest

A pair of experiments find that mice choose to run less after taking antibiotics, even though their endurance is unchanged

Here’s how to identify and respect your body’s limits as you work to improve your hip mobility

New data shows that, unlike a car, you can’t perform well with a half-full fuel tank

Wellness trends often rely on catchy jargon, complex methods for optimizing health and fitness, and unsustainable practices. Our health columnist believes that simpler is usually better when it comes to developing a routine.

Hip flexors creaky and tight? We’ve got the antidote: yoga poses that stretch hip muscles and provide relief.

New data outlines how much they run, how long it takes to resume training after giving birth, and how well they return to competition

The unending search for a competitive edge in sports has a cost. It’s called the Red Queen effect.

Runners make bigger improvements following a flexible workout schedule rather than sticking with a predetermined one

A new twist in the old debate about caffeine's performance-enhancing powers suggests it helps maintain oxygen levels in the blood

The Under Armour HOVR Machina 3 is made for the high mileage runner looking to finish strong

Women are said to be 10 to 12 percent slower than men across distances, but a new analysis finds narrower gaps for sprinters

These moves will help you safely progress until you’ve got the exercise down

These exercises will help you stand tall—and boost your athleticism

A friendly reminder that there’s much more to a strong core than visible abs

When pain happens, sometimes your instinct is to not move at all. Research suggests that's not always the right answer

There’s encouraging new evidence on artery stiffening and the risks of too much exercise

This quick workout will help build strength and a range of motion in your ankles, knees, hips, and spine

A new study aims to resolve long-standing debates about how much drafting helps runners, and finds that even back-of-the-packers save meaningful time

Mounting evidence suggests that women respond differently to endurance training after menopause. Could donating blood be the solution?