18/11/2011

(VIDEO) The Once and Future Way to Run

The Once and Future Way to Run
Jorg Badura for The New York Times
The Lost Secret of Running: Christopher McDougall demonstrates a lost running technique from the 1800s called the 100-Up.
    When you’re stalking barefoot runners, camouflage helps. “Some of them get kind of prancy when they notice you filming,” Peter Larson says. “They put on this notion of what they think barefoot running should be. It looks weird.” Larson, an evolutionary biologist at Saint Anselm College in New Hampshire who has been on the barefoot beat for two years now, is also a stickler about his timing. “You don’t want to catch them too early in a run, when they’re cold, or too late, when they’re tired.”
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    If everything comes together just right, you’ll be exactly where Larson was one Sunday morning in September: peeking out from behind a tree on Governors Island in New York Harbor, his digital video camera nearly invisible on an ankle-high tripod, as the Second Annual New York City Barefoot Run got under way about a quarter-mile up the road. Hundreds of runners — men and women, young and old, athletic and not so much so, natives from 11 different countries — came pattering down the asphalt straight toward his viewfinder.
    About half of them were actually barefoot. The rest wore Vibram FiveFingers — a rubber foot glove with no heel cushion or arch support — or Spartacus-style sandals, or other superlight “minimalist” running shoes. Larson surreptitiously recorded them all, wondering how many (if any) had what he was looking for: the lost secret of perfect running.
    It’s what Alberto Salazar, for a while the world’s dominant marathoner and now the coach of some of America’s top distance runners, describes in mythical-questing terms as the “one best way” — not the fastest, necessarily, but the best: an injury-proof, evolution-tested way to place one foot on the ground and pick it up before the other comes down. Left, right, repeat; that’s all running really is, a movement so natural that babies learn it the first time they rise to their feet. Yet sometime between childhood and adulthood — and between the dawn of our species and today — most of us lose the knack.
    We were once the greatest endurance runners on earth. We didn’t have fangs, claws, strength or speed, but the springiness of our legs and our unrivaled ability to cool our bodies by sweating rather than panting enabled humans to chase prey until it dropped from heat exhaustion. Some speculate that collaboration on such hunts led to language, then shared technology. Running arguably made us the masters of the world.
    So how did one of our greatest strengths become such a liability? “The data suggests up to 79 percent of all runners are injured every year,” says Stephen Messier, the director of the J. B. Snow Biomechanics Laboratory at Wake Forest University. “What’s more, those figures have been consistent since the 1970s.” Messier is currently 11 months into a study for the U.S. Army and estimates that 40 percent of his 200 subjects will be hurt within a year. “It’s become a serious public health crisis.”
    Nothing seems able to check it: not cross-training, not stretching, not $400 custom-molded orthotics, not even softer surfaces. And those special running shoes everyone thinks he needs? In 40 years, no study has ever shown that they do anything to reduce injuries. On the contrary, the U.S. Army’s Public Health Command concluded in a report in 2010, drawing on three large-scale studies of thousands of military personnel, that using shoes tailored to individual foot shapes had “little influence on injuries.”
    Two years ago, in my book, “Born to Run,” I suggested we don’t need smarter shoes; we need smarter feet. I’d gone into Mexico’s Copper Canyon to learn from the Tarahumara Indians, who tackle 100-mile races well into their geriatric years. I was a broken-down, middle-aged, ex-runner when I arrived. Nine months later, I was transformed. After getting rid of my cushioned shoes and adopting the Tarahumaras’ whisper-soft stride, I was able to join them for a 50-mile race through the canyons. I haven’t lost a day of running to injury since.
    “Barefoot-style” shoes are now a $1.7 billion industry. But simply putting something different on your feet doesn’t make you a gliding Tarahumara. The “one best way” isn’t about footwear. It’s about form. Learn to run gently, and you can wear anything. Fail to do so, and no shoe — or lack of shoe — will make a difference.

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