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Sunday, April 22, 2007

Harnessing Tai Chi's Quiet Strength for Health

Is your chi not flowing right?

Whether or not you subscribe to the theory that the mind and body contain this mysterious, potentially healing force, the ancient martial art known as Tai Chi can still help bring health and fitness into line, experts say.

What's more, unlike more strenuous physical activities, Tai Chi's slow, balanced movements "are very accessible to older adults or patient populations that may have some physical limitations," said Dr. Michael Irwin, a professor of psychiatry and a researcher at the Semel Institute for Neuroscience and Human Behavior, part of the University of California, Los Angeles, School of Medicine. He's conducted much research on the health benefits of the practice.

He defined Tai Chi, which originated centuries ago in China, as "a series of slow-moving movements that have a meditative quality, incorporating both physical movement as well as meditation."

Practitioners, who swear by Tai Chi's ability to calm body and soul, often talk about chi and the discipline's ability to restore a yin-yang physiological balance to this "life energy." Irwin said there's currently no way to scientifically validate these theories, "but I'm not bothered by that, because there are lots of things in the world that we do not understand because we do not yet have a way to measure them."

He and other researchers have been able to compare the health of Tai Chi devotees against that of more sedentary types, however. Using a standard "Medical Outcomes Scale," researchers have shown "that there are robust improvements in physical function -- simple things like being able to carry groceries, walk, go up stairs," Irwin said.

That's because Tai Chi, while seemingly slow, is surprisingly good exercise. "There are a number of studies on Tai Chi and its aerobic effects that show that metabolism increases, and there's physical conditioning over time," Irwin said.

Benefits extend to other areas, as well. A much-publicized study this year from Emory University in Atlanta found that Tai Chi helped elderly practitioners reduce their risk for potentially lethal falls. Irwin's own work at UCLA found that Tai Chi reduced older people's risk for the immune disorder shingles. Another UCLA study, to be published soon in the journal Gerontology, showed that it boosted the function of the sympathetic nervous system, which has long been tied to good cardiovascular health.

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Tuesday, April 10, 2007

Tai chi may help prevent shingles

Tai chi is already known as a good low-impact exercise for older people. Now a recent study suggests it offers benefits beyond improving fitness and balance: It may help prevent shingles, a painful skin condition.

Researchers found older people who performed the slow, graceful movements of tai chi had a better immune response against the virus that causes shingles than those who only got health education, according to the most rigorous test to date.

It's unclear how tai chi, an ancient Chinese martial art that has become increasingly popular in the West, affects the immune system. But health experts were encouraged by the positive results.

"The message is that older people need to maintain healthy behavior," said Andrew Monjan of the National Institute on Aging, which helped fund the research. "It's nothing that our mothers haven't told us, but we're seeing it certainly holds up to scientific inquiry."

The study appears in the April issue of the Journal of the American Geriatrics Society and was led by Dr. Michael Irwin of the University of California, Los Angeles.

Shingles is a painful skin rash that can pop up in people who have had chickenpox. The chickenpox virus can remain dormant in the body and resurface as shingles years later. It usually starts with pain and itching on the skin that later turns into an irritating rash.

An estimated 1 million Americans are afflicted with shingles every year and it commonly occurs in people 50 years old and older.

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