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Simulating combat will whip your own butt into shape, while helping you build power and endurance

The resistance—and softness—of the sand and water will make you more versatile

The classic strength and power move gets a makeover, giving you even better benefits

Four ways to avoid a potentially dangerous inflammatory response

The classic military move gets a makeover

To simulate the unpredictability of your sport, add elements of randomness—and downright chaos—to your exercise regimen

Dominate your favorite sports without any weight training

You don’t always need a highly structured training plan to get into fighting shape

Over the past decade, ultrarunning has gone from a fringe pursuit for distance freaks to a hypercompetitive sport attracting big-time sponsors. But a mysterious training condition is suddenly plaguing its ranks, robbing a generation of top athletes of their talents and forcing victims to wonder: Is it possible to love this sport too much?

Marco Sanchez demonstrates.

The number of hours you're supposed to shoot for: 4

Short answer: Don't worry about what's "right."

We put five common maxims to the test

Pain fades, but glory is forever. Or at least until your next competition.

A behind-the-scenes documentary look at the human drama of endurance racing and the bonds formed between Porsche drivers, teams, fans and cars. …

Jumping and "plyo" exercises boost speed and power. But they can benefit distance athletes, too.

Forget complicated workout regimens. CrossFit phenom Christmas Abbott shows simple strength exercises are all you need to start feeling fierce

Research suggests artificial muscle enhancers stick with cheating athletes for life. So will we see lifetime bans for first-time cheats?

Nobody knows exactly what Ironman will do now that the government has shuttered the Kona lottery, but we have a proposal: use those extra entry spots to grow women's racing.

The data sure isn't driving us nuts

This May, another group of climbers, parkour runners, and gymnasts will try—and most likely fail—to achieve “Total Victory” on the nation’s favorite obstacle course show.

In the grueling world of ultrarunning, she's an anomaly: a low-key athlete who thrives on unstructured training, competes by instinct, and crushes men in the sport's most prestigious race

Thought those monkey bars were tough at your last OCR? Wait ‘till you see these.

Leadville, Western States, and the New York Marathon all use some type of lottery system to determine entrants as well

The Best Workout Wear of 2015.

Salute the sun in style.

They're painful but also magical, relieving the post-workout soreness that afflicts so many athletes. But do they really aid recovery? Increasingly, the evidence says no.

Started by Ivy League athletes, the C.R.A.S.H.-B. World Indoor Rowing Championship is opening up the sport to a whole new crowd.

Expert tips to help you get the most out of your strength session—so you don't waste your time.

Their genius is unquantifiable. That's a lesson Triathlon Australia learned the hard way.

New research shows that pushing through fatigue can boost your performance

New research is helping athletes engineer their own flow state

My city gets smoggy during the summer months. Will it make me sick to train outdoors?

You can do this yoga-meets-wrestling series of movements anywhere, with results that put the weight machines to shame

A little of both, probably

Fat and fit is a myth, but a few extra pounds won't kill you—and being skinny won't necessarily save your life.

I got myself a sport watch and it came with a chest strap. I'm tempted not to use the strap because heart rate training seems difficult. Any tips for making it simple?

Spanning nearly 350 miles across some of the most beautiful and rugged country in the world, the GODZone �����ԹϺ��� race is one of the most demanding events on the planet. Only 14 of the 52 finished the 2015 course. Feel their pain.

How even the smallest intervals can make athletes mental superstars.

I know I need some help with my current workout regimen, but I don't know where to start.

I'm an endurance athlete and I feel like if I can't get in at least an hour, working out is pointless. Is there any benefit to training if I have less than 20 minutes to do it?

Two dueling trainers resurrect a forgotten but insanely effective gym machine

Basketball or soccer games with friends can take the place of cardio, but they shouldn't be your only form of exercise.

New tech company FitRankings lets you measure how effective your workouts really are—and compare them head-to-head with other athletes around the world.

How one team is leading pro cycling out of the concussion Dark Ages—and providing a potential road map for the NFL

Losing fat and boosting muscle mass can make a big difference in how you burn calories.

Boost reaction time and reduce clumsiness on the field with these expert moves.

Michael Phelps and Killian Journet are both amazing athletes, but they occupy opposite ends of the spectrum. Where do you fall?

Get more from your standing desk.

The science behind how logging lots and lots of miles fosters an unflappable demeanor—and how to get it yourself.

The pain, beauty, and nipple considerations of running for a really, really long time

Turns out you'll start to see and feel results from a new workout routine very quickly—sometimes after just one session.

You just have to tweak your training and eating habits. Here’s how.

Your pounding headache is no excuse to not get after it on the mountain.

Rattle and roll

The Court of Arbitration for Sport might be going down. And that isn't necessarily a good thing for athletes.

So conquer it with these six tips from cycling’s comeback queen, Alison Tetrick.

Some companies claim that their clothing can make you burn extra calories. Don't believe the hype.

Pro photographer Larry Rosa looks for pain, postcards, and the hidden stories within every endurance race.

It's called the Cyclic Variations in Adaptive Conditioning machine, and it looks like a sci-fi egg from outer space. In theory it one-ups standard hypobaric chambers by giving users greater aerobic gains in a fraction of the time. Is CVAC crackpot pseudoscience? Or an important new discovery that could change the way you train?

Beginners, we have a secret for you. You don't need high-end gear or a fancy training plan to get better at skiing, running, or climbing. All you have to do is embrace the embarrassment and the pain—and don't forget to laugh. Trust us: It'll be good for your brain.

Tips from legend Lee Sheftel, who sent his first 5.14 after his 59th birthday

Keri Herman only started skiing seriously in her senior year of college. Now she's an Olympian. Here's how she turned her late start into a competitive advantage.

Used to be you had to live at altitude to adapt to it. But new research suggests that by training your respiratory muscles, you can teach yourself to perform better with less oxygen.

There's nothing wrong with tuning into a show while you're on a trainer. It can actually have some surprising benefits—if done in moderation.

This super coach’s three unconventional training strategies may be the key to your next PR.

Plus the secret to Lindsey Vonn's amazing comeback.

The Tough Guy race series challenges even the fittest of athletes. Three-time champ James Appleton suffered from severe hypothermia near the end of an event in Perton, UK on February 1, and had to delay celebrating his third place finish. This clip, from Scott Keneally’s upcoming film…

The Super Bowl virgin on running hills, eating yogurt, and guarding Revis Island.

Feed your competitive appetite—sometimes without even leaving the house.

As sensor technology improves and becomes more practical, so does the ability of coaches and athletes to collect—and react to—more nuanced data.

Performance wear that makes you the canvas

You know your weight-training regimen? It's breaking you down. Build yourself up for endurance success—and prevent injury—with these five improved alternatives.

Is it possible to train your body to decrease the amount of rest it needs?

A recently declassified report shows that stressing your mind is the secret to training your body.

Want to undo the damage of your desk job in 10 minutes? Crawl like a kid and start spinning like a Sufi monk.

I just had surgery after a skiing accident, and my wrist is in a cast for several weeks. What can I do to avoid losing strength while I can't move it?

Breakthrough therapies are helping athletes recover from injuries previously thought untreatable. But many doctors remain unaware of the advancements.

Six surprising reasons to sweat that go far beyond vanity.