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?

A deep dive into the sports science literature shows why you should be wary of results that seem too good to be true

Try these strengthening stretches for stronger limbs

A small Minnesota company believes it has developed the future of fitness tech. Now it has to teach the rest of us how to use it.

After becoming the youngest adult to run 100 marathons, she’s chasing even bigger running goals and helping fellow Dreamers and young women realize their own potential

With the UA Flow Synchronicity, Under Armour delivers a running shoe designed to fit and support the natural shape of a woman’s foot so women can run even faster

Here’s what the science says about making it to the top as quickly and efficiently as possible

A new study assesses how childbirth altered the career trajectories of the fastest marathoners in history, with encouraging results

New research explores whether the performance-boosting effects of positive self-talk can be attributed to more than just the absence of negativity

Ten great reads for the beach (between workouts) or the airport (between flight delays)

In an excerpt from his new book, ‘Do Hard Things,’ Steve Magness explains a clever tactic to combat anxiety and free yourself to perform

A team of Canadian Olympic sports psychologists tries to nail down the intangible “it”

A new study compares active and passive interval recoveries, but physiology isn’t the only factor to consider

Between the charming small town and countless wineries, there is great trail running to be found in Walla Walla, Washington

The algorithms used to estimate your training load have some fundamental flaws, scientists say

These shoes may not be traditional, but they’ll fit your lifestyle like a glove

Most people run the same pace regardless of how far they’re running, according to new research

Pro trail runner Abby Hall shares lessons that can help other runners achieve their goals, whether they’re just starting out or training for an ultra

Like the two-hour marathon chase, next month’s assault on the seven- and eight-hour Ironman barriers will require some rule-bending

Scientists studying mice found that their competitive efforts depended on their social ranking rather than their strength or speed

An analysis of power data from pro cyclists quantifies the effects of hot and cold air temperatures on performance

You can’t run fast without using your arms—or can you?

Stairs aren’t just for stepping—this creative workout will have your whole body feeling the burn

Despite years of research, the athletic potential of Montmorency cherries isn’t as sweet as it sounds

Can two and a half minutes of instruction turn you into a better athlete? Givego thinks so.

Australian gearmaker 2XU is beloved by everyone from new moms to Olympic athletes. Now they are looking to create a fitter, healthier world.

An analysis of pro cycling data finds that altitude-born South American riders race better at high altitudes than their lowland-born rivals

The oral health risks associated with heavy sports-drink use seem clear, but the evidence remains murky

New findings suggest that results from large training studies can’t be generalized to individuals

As demand for the fitness brand’s famous bikes and treadmills peters out, its dedicated user base might be its saving grace