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Wipe that mustache off your face. With milk blamed for a growing list of health issues, we put the leading alternatives to the test.

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Finally, all the performance enhancing nutrition items you need, delivered

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Recent endurance milestones in open-water swimming and trail running suggest that women may one day be faster than men

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The Olympic decathlete on how to eat, train, and perform better

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Roomy, great for heavy loads, and has a super-customizable hipbelt.

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Ellie Greenwood, winner of the 2012 ­Western States 100-mile Endurance Run, on balancing big miles with a day job.

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A team of African-American climbers heads to Denali this June with a lofty goal—to inspire more diversity outside

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Keep ticks (and Lyme Disease) away this summer with a few simple guidelines

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Athletes brave avalanche conditions

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Why fitness training via webcam is more popular than ever

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Even endurance athletes can score performance gains with high-intensity interval training. Here's how to do it.

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A brief guide to the biggest environmental issue of the 2012 election

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The best blenders for whipping up recovery smoothies.

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Three surefire recipes to supercharge your workout

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Like many fanatical sports, ultrarunning comes with its own set of vocabulary. Though it's nothing compared to baseball, here are a few words and phrases from the ultrarunner's lexicon.

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When it comes to the Ultra Trail du Mont Blanc, one of the world's most grueling footraces, they say you should always expect the unexpected. And, this year, that couldn't have been more true.

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Meaghen Brown, on the ground in Chamonix, France, for one of the world's most grueling footraces, looks at some of this year's top contenders

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Meaghen Brown is in France, reporting from one of the world's most grueling footraces

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Short conversations with the world's most interesting people

Irmiger talks about the gender divide in mountain biking and the challenges of making it big

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The following report in the case against Mortenson for allegedly fabricating stories told in his best-selling books, Three Cups of Tea and Stones Into Schools, was released on April 30, 2012

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The top of the world is getting more crowded—last spring, 94 teams visited base camp, and 535 climbers reached the summit. Rescue operations are getting more sophisticated, too, with high-altitude helicopters and, starting this year, a team of Sherpa rangers. Here's a look at where things go wrong and the support systems in place when they do.

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Weather's role at the Boston Marathon

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BASE stands for “buildings, antennae, spans, and earth,” and jumpers parachute from these and other fixed ­objects—an incredibly risky pursuit that has claimed at least 180 lives since 1981. The world’s deadliest sport has no governing body, but the online magazine Blinc maintains the official BASE jumping fatality list (BFL), which assigns each dead jumper a B

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Nobody doubts that Garrett McNamara surfed a massive wave last fall. But was it really the biggest ever ridden?

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Everything you need to know about locking up your bike

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A primer on the three toughest types of locks

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