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She won Olympic gold in a sport that chose her. Can she do the same in the one she truly loves?

The perfect summer day in this California beach town

Forget about counting reps in your head. This clever jump rope uses embedded LEDs to project that number in front of you.

American churches are building first-class gyms to get followers in shape and attract new members to the flock. Critics see lucrative businesses masked as ministries, but the programs are a spirited defense against our obesity epidemic.

How endurance athlete Patrick Sweeney puts away nearly 3,000 calories a day on the ketone diet

Two weeks of full-time, one-on-one instruction at Exos can set you back $4,800. Here’s how to get many of the same performance benefits without taking out a second mortgage.

Goodbye crazy binges, hello almond butter?

An expert look at the most feasible—and nuttiest—submissions

Inside Specialized and Stanford University’s new alliance to research cycling’s effects on kids with ADHD

The suit, filed after 28-year-old Avishek Sengupta drowned at the 2013 Tough Mudder Mid-Atlantic event, had major implications for the obstacle-course-racing industry

The secret to unlocking your athletic potential is in your genes, but scientists don’t know what they’re telling us—yet

And why they’re more susceptible to diet trends

And when they'll be smashed—because half the fun of records is watching them fall

Inside the revolution to reclaim city waterways for recreation

Sorry, that wildly popular New York Times story is not for you

A lawsuit reveals the personal spat that brought an end to the iconic endurance event

A new detergent called DeFUNKit promises to scrub stinky bacteria from synthetic workout apparel. We put the stuff to the test during a week of skiing, running, and traveling—and found we smelled as good on day seven as we did on day one.

Why Aussie athletes often turn to supplements when living high

The somewhat simple answer to a popular question

Essential race-day, gear, and training intel

Champ Amby Burfoot and streak runner Ben Beach give the DL on the world’s most storied marathon

Everything you need to know about ultrarunning's ultimate gateway drug

What you need to know to start competing in the ultimate chill winter sport

Insider tips on conquering Aspen’s hottest event

Faves tweaked to optimize performance and recovery

4 strategies to help you quit worrying and learn to love the snow

The right moves make you faster and more resilient. Here's how to get the most important part of your training routine right.

Outsmart three winter-specific risks before, during, and after your workout

The new genetic tool has the potential to increase resistance to muscular injury or stress fractures—even produce stronger, faster athletes—but it's a puzzle that could take decades to solve

The sport ends its most outrageous elements in a quest for longevity

A new study brings up two more glaring reasons to avoid hitting the wall in training

Inside the first ever Faith and Fitness Conference in New Orleans

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