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Many believe intermittent fasting negatively affects women’s hormones and fertility. The science suggests otherwise.

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

Apples no one has ever tasted are still out in the wild. Dave Benscoter, a retired FBI agent, has spent a decade searching for these 100-year-old heirlooms.

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

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”

A crazy-sounding idea—build a tube from the Pacific to bring water to Utah’s Great Salt Lake—raises a larger question: Are we willing to do absolutely anything to fight climate change?

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

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

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

Chances are you can catch the nighttime spectacle from your backyard

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.

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

New studies confirm that spending time outside can ease physical symptoms

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.

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

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

After the ocean took away her partner, the marine biologist found a way to live with loss

Schools invested in outdoor ed during the pandemic, but the growth was disproportionate to high-income communities

Experts weigh in on whether your period ought to have a say in your workouts

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

There's a lot of outdoor misinformation out there, and we're on a quest to quash it

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?

Research makes a strong case for taking your practice into the wild as the weather warms—or at least your backyard

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

Exploring how the simple act of spending time outside can solve so many of life’s problems

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

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

Whether you’re determined to embrace a healthier diet or finally ride that mountain bike you bought during the pandemic, wellness-focused getaways can help bring those good intentions to fruition. Here are awesome travel-focused ideas designed to do just that.

Running and composing music require a similar problem-solving area of the brain, so it might not be a coincidence that there’s crossover

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

Healthy habits are hard to maintain. We sent five writers on long-overdue quests for self-improvement.

After years of infinite scrolling, it was time for a drastic intervention

Believe it or not, talking to new people won’t kill you

Figuring out how to get better sleep and more excise and is hard—which is why we tried out some new programs for you

And what does Damar Hamlin’s cardiac arrest tell us about the risks sports pose to an athlete’s heart?

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

From the whimsical to the epic, these are our favorite stories of the year

Cautionary tales from the official journal of the Wilderness Medical Society

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

A selection of recent titles to keep you warm by the fire 

The shredders, climbers, policy-makers, barrier breakers, and scientists who forever changed the way we view the world

The group of scientists and adventurers gained valuable knowledge about climate change’s impact on ice in the Weddell Sea, and did additional research on weather, navigation, and marine engineering

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

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

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

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

The acclaimed science writer answered audience questions about reporting on the race to understand the SARS-CoV-2 and how the COVID-19 pandemic began

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

The acclaimed nonfiction writer talked to nearly 100 scientists to tell the story of how the virus that caused COVID-19 spilled over into humans and spread across the globe

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

Join us for a live Zoom Q and A with the acclaimed science writer and longtime Outside contributing editor, who will discuss his new book about the SARS-CoV-2 virus on Thursday, October 13

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

Spoiler alert: It’s not because you’re a wuss.

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

If you want workers to come back to the office, here's a thought: let them wear shorts

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

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

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.

‘Fire of Love’ uses the archival footage from Katia and Maurice Krafft to tell the story of how they fell in love and pushed the boundaries of science and adventure

People develop sensitivities to just about everything these days, but can you really be allergic to frigid temperatures? Our writer takes us on a wild—and potentially life threatening—journey to find out.

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

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

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

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