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Barefoot Running Laced With Health Benefits

Running Barefoot Creates Less Collision Force Than Running in Cushioned Shoes, Study Says
By
WebMD Health News
Reviewed by Louise Chang, MD

Jan. 27, 2010 -- Running barefoot causes less collision force to the feet than running in cushioned shoes, a new study says.

Researchers reporting in the Jan. 28 issue of the journal Nature show that runners who run without shoes usually land on the balls of their feet, or sometimes flat-footed, compared to runners in shoes, who tend to land on their heels first.

Cushioned running shoes, which date back only to the 1970s, may seem comfortable but may actually contribute to foot injuries, say Daniel Lieberman, PhD, professor of human evolutionary biology at Harvard University, and colleagues.

The scientists, using motion and force analyses, showed that barefoot runners who strike on the fore-foot (land on the balls of their feet) generate smaller collision forces than shod rear-foot strikers.

The researchers say that although there are anecdotal reports of reduced injuries in barefoot populations, more work is needed to test their view that either barefoot runners or those with minimal footwear (such as sandals or moccasins) have reduced injury rates.

Running Barefoot Can Be Comfortable

By running on the balls of the feet or the middle of the foot, runners avoid more forceful impacts, equivalent to two to three times of body weight, that shod heel-strikers repeatedly experience.

“People who don’t wear shoes when they run have an astonishingly different strike,” Lieberman says in a news release. “By landing on the middle or front of the foot, barefoot runners have almost no impact collision, much less than most shod runners generate when they heel-strike.

“Most people today think barefoot running is dangerous and hurts, but actually you can run barefoot on the world’s hardest surfaces without the slightest discomfort and pain.”

He says a few calluses can help runners avoid injuries.

Build Up to Barefoot Running

Lieberman and colleagues analyzed the running styles, or gaits, of five groups of people -- U.S. adult athletes who had always worn shoes, Kenyan adult runners who grew up barefoot but now wear cushioned running shoes, U.S. adult runners who grew up wearing shoes but now run barefoot or with minimal footwear, Kenyan adolescents who have never worn shoes, and Kenyan adolescents who have worn shoes for most of their lives.

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