A leading exercise physiologist suggests developing a top speed two times faster than your marathon pace for a “speed reserve.” Here’s how to improve yours.

A training plan and general principles to guide your first foray into longer ultramarathons

The legendary naturalist-ultrarunner discusses his highs and lows over decades of training, running a 50K at age 81 after a car accident, and what comes next

Don’t be confused by the diversity of running workouts. Learn the training zones they fit into, what type of fitness each zone builds, and how each feels.

These iconic U.S. road races deliver high energy, historic courses, and guaranteed fun

We’re expanding our running coverage, and PodiumRunner is moving over to Outside Online

Starting at five hours a week, this ten-week program will help you build endurance and jump-start your training this winter

Scientists have figured out how to make simple exoskeletons that improve running efficiency. Should track and field authorities be worried?

He needed something—anything—to cure his winter COVID blues. Science led him to a mildewy steam room and a very cold shower.

The unlikely new American record holder in the marathon believes her best racing days are still ahead of her

Different workout styles can get you equally fit, but they affect your body differently—which suggests that you should mix it up

Three methods to cultivate pacing mastery and optimize your performance potential

‘Maintenance Phase’ hosts Aubrey Gordon and Michael Hobbes are tackling everything from Halo Top ice cream to the war on obesity

The 40-year-old’s stunning performance smashed two world records on Friday

Looking to sign up for your first triathlon? We share everything you need to know to help you have a successful first race.

A new way of classifying athletes aims to quantify the thresholds that distinguish recreational athletes from their trained, highly trained, and elite brethren

Our Sweat Science columnist spent two months measuring his blood sugar around the clock. Here’s what he found.

Three types of training that will improve your speed, stride, and stamina, but won't burn you out.

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The first-ever Graphene foam hiking boot delivers unprecedented energy return and cushioning.

Improve your running by integrating these strength, mobility and balance exercises into your daily routine—so you'll be sure to do them regularly.

New big-data study digs into hitting the wall in the marathon, revealing who is most likely to crash, when, and how much it will cost you.

Even those running less get faster in races when abiding by this golden ratio of training intensity.

The Olympic medalist turned coach didn’t have time to fully prepare and almost burned out mid-quest. Here’s how she adapted and finished strong.

The latest “exercise in a bottle” study finds that plasma from exercising mice makes sedentary mice smarter. But don’t throw out your workout gear just yet.

New Year's resolutions are for the birds

Rethink your approach to work, fitness, and process as you head into the new year

This year’s predictions include fewer diets and a possible return of minimalist running shoes

Athletes like Mikaela Shiffrin have started adopting the training technique to increase endurance, muscle mass, and more

Over the past decade, research into compression sportswear has exploded. Here’s what the results reveal.

The case for marking the passage of time by running your ass off

Three pro tips to restore your childlike joy of running fast and make speedwork more enjoyable and effective

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Looking for an extra boost of motivation? Find someone to share the miles with this winter.

These days I can break a record while finishing last. Some say they find me inspiring, but I often feel like a decrepit but willing old dog who gets a pat when he tries to chase his ball.

Overcomplicating sports nutrition wastes money and time. It also perpetuates privilege.

Perfect for gifting—or treating yourself in the new year

Seasonal outdoor work seems idyllic, but it isn’t an easy lifestyle. Guides are starting to open up about the challenges of constant transitions, and new research offers insight into their unique situation.

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Expert advice for lacing up and running bold in the cold

The case for an event that’s somewhere between the Boston Marathon and the Olympic Trials

After Lawlor Coe lost his brother Hunter to tragedy, he did everything he could to avoid his pain. Then he began to run.

It’s time to break out the merino base layers and the heat-exchange breathing masks

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