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A new study investigates how different types of physical performance are affected by the time of day

The Prime X is banned for professional athletes, but that might be its main selling point

We’ve sweat in them, worn them on muddy trails, and through countless miles on pavement. Now they’re discounted.

“I’ve tested over 100 pairs of athletic socks during my time working as Outside’s Gear Guy,” wrote columnist Joe Jackson. “The best socks for blister prevention over long distances are Swiftwicks.” These Swiftwick National Parks Print socks held up during Jackson’s most recent 50-mile race.

The Phd Run Light Elite sock won our test of the best running socks. “It wicked better and dried faster than most of the 58 other socks we tested, seemingly regardless of weather or trail conditions,” wrote tester Cory Smith.

There are lots of ways to find your running potential. These tips may not be helpful in that process.

Can mindful running make you faster—or at least happier?

For New Generation Track and Field, established media companies are too stuck in their ways

Stock up for fall adventures with these killer deals on gear we’ve tested in the field

These models will help you push your speed limits

Follow the founders of the Collins Cup as they organize and train for a new kind of global triathlon

Endurance-science experts explain the world record holder’s incredible marathon dominance

From light sprinkles to daylong downpours, these shells have you covered

Running nerds won’t learn anything new from ‘Kipchoge: The Last Milestone,’ but it’s still a feast for the eyes

This shoe won our Gear of the Year award in our 2020 Summer Buyer’s Guide. Its “engage-as-needed support system makes for an exceptionally comfortable ride,” wrote our testers. “It’s a great choice for neutral runners whose feet collapse inward when they’re tired and for chronic pronators who’ve…

For elite mountain athlete Hillary Allen, a near deadly fall was the start of a long, winding journey to find a new source of strength and purpose

In our long-term test of the best women’s running shorts, our testers picked the Strider Pro as the best low-rise pair. “Aside from the next-to-skin feel, the biggest benefit of the Strider Pro is that it stays out of the way. The generous leg openings and light, stretchy fabric make it feel roomy.”

Injury forces ultra legend Scott Jurek off the trail

The Tokyo Games reminded us why athletics remains the greatest show on earth

Our gear director has tried many workout drinks while exercising in the high desert of northern New Mexico. He thinks Nuun is the best. “I’ve tried countless other during-exercise solutions and found that Nuun products are the lightest and most gentle on my stomach,” he wrote.

No runner has ever won the 5,000-meter, 1,500-meter, and 10,000-meter treble at the same Olympics. But there have been other memorable distance triples and doubles.

In what might be the first step toward an unprecedented triple, the Dutch runner won two races on the same day

Exercise and digestion often don’t mix well, but scientists are on the case

Despite IOC malfeasance and the ongoing pandemic, the five-ring spectacle is too seductive to ignore

After losing his father to cancer, a mule deer researcher embarks on a healing migration of his own

After 2,652 miles, 400,000 feet in elevation gain, and more than 51 days, the ultrarunner finished his PCT thru-hike

When, how, and what to tune in for running, cycling, sport climbing, surfing, and more

As events as big as the Olympic Trials get rescheduled because of heat, we went to the science to find out how you should decide when it is too hot to run safely

Five years after the Vaporfly upended marathon running, track shoes are set to star in Tokyo

New research fine-tunes the details of heat adaptation

After two more star runners have been excluded by World Athletics’ policy, the governing body will have to reap what it has sown

Amid a national conversation about race, colonialism, and justice, Native mappers and runners are reclaiming Indigenous cartography, names, and land

A bevy of mapping apps exist to track and plan trips for different outdoor activities. Here’s the best one for running, cycling, hiking, backpacking, climbing, and skiing.

The 44-year-old is ready to take on the world’s best marathoners at the Tokyo Olympics.

It has all the comfort and features you’d expect from a high-end performance shell, but at an affordable price

Thanks to these boots, hiking went from painful to pure bliss

The physiology of events like the Ultra-Trail du Mont-Blanc is radically different from “short” events like the marathon

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