Sunday, May 18, 2008

Nurturing a Happy Heart: Yoga

Stand up. Really, stand up. Inhale deeply and reach for the sky, as high as you can. Next, slowly blow your breath out, sweeping your arms past your sides and bending toward the floor as you empty your lungs. Draw fresh air into your lungs and slowly roll back up to a standing position, arms by your sides. Feels good, doesn’t it?
You can sit down now.

What you just did was sample the simple science of yoga -- moving your body to fend off sitting disease while clearing your mind to nurture a peaceful, happy, healthy heart.

Unlike Western medicine, which takes the Jiffy Lube approach to wellness by directing you to a fix-it specialist for each of your broken parts (Bunions? See a podiatrist. Depression? That’s a psychiatrist’s job!), traditional Eastern medicine uses holistic systems such as yoga to treat your mind and body as one.

Developed 5,000 years ago in India, yoga reached American shores with immigrants back in the 1800s. Only in recent decades, though, has our faster-moving, increasingly stressed population embraced this exercise that’s more serene than sweat, more meditative than muscle. Today in the United States, more than 15 million people include yoga in their regular fitness routines. Its advocates range from Madonna to Sandra Day O’Connor and from NFL running backs to Wall Street brokers.

Although some people focus their practice more behind -- striving for the coveted firm “yoga butt” -- than inward, scientific evidence from the past 10 years shows that this traditional-yet-trendy, mind-body medicine can relieve symptoms of chronic diseases such as cancer, arthritis, and yes, heart disease. Even hospitals are getting in on the act. At New York Presbyterian Hospital and Cedars-Sinai Medical Center in Los Angeles, cardiologists routinely steer patients into programs that offer yoga as part of their preventive and rehabilitative care.

Hooked?

Once you get a taste of yoga, you may find yourself craving a full course. Investing more time will help you reap even more benefits. If you’re interested, try a Sun Salutation workout -- a popular series of 12 yoga postures performed in a single, graceful flow. The Sun Salutation builds strength, as well as increasing flexibility and promoting a sense of calm. If that isn’t enough to quench your thirst, yoga information is easy to find. Bookstores have loads of great guides; almost all gyms and senior centers offer classes; videos are available at the library; yoga magazines are on newsstands; and, of course, the Internet has an overwhelming amount of information.

Disease Reversal

Internationally renowned heart disease researcher Dean Ornish, M.D., of the Preventive Medicine Research Institute in Sausalito, California, may have been the first Western physician to place yoga alongside diet and exercise at the foundation of a heart-healthy lifestyle. In his most cited study in 1990, Dr. Ornish tested 48 men and women with medically documented coronary heart disease. The doctor assigned 28 participants to a lifestyle regimen that included yoga, group counseling, and an extremely low-fat vegetarian diet. The rest received their usual care and continued their regular lifestyle habits.

After a year, those in Dr. Ornish’s test group actually had clearer, more supple arteries -- indicating that their heart disease was reversing -- while the arteries of those in the control group continued to clog and harden. Eight years later, he published a follow-up study showing that 80 percent of 194 men and women with heart disease were able to avoid bypass surgery by following a similar lifestyle intervention program that included yoga.

Although the lion’s share of his colleagues credited the spartan, zero-saturated-fat food plan with bulldozing built-up plaque, Dr. Ornish steadfastly argues that adherence to yoga is as strongly correlated with reductions in artery blockage as is adherence to the diet.

During a 2003 study, a research team in India tested 113 men and women, ages 35 to 70, with documented coronary artery disease. They placed 71 in a yoga lifestyle program, which included stress management, exercise, and a plant-based diet, while the remaining volunteers took heart medications and followed a more typical Western medicine prescription of diet and lifestyle tweaks. One year later, the yoga group had fared much better, averaging a 23 percent drop in cholesterol levels compared with only a 4 percent reduction among the med-taking volunteers. What’s more, 44 percent of the yoga participants showed reversals of their heart disease, and artery hardening was stopped in its tracks for 47 percent -- significantly greater improvements than those in the control group.

Fight-or-Flight Deactivated

While there’s no denying that diet is a powerful component of the “yoga lifestyle,” the ability of this flowing, serene exercise to defuse stress is probably yoga’s most potent power in battling heart disease. We’ve all heard of the fight-or-flight response, which occurs when, at the slightest whiff of threat, your body’s Fort Knoxian personal security system gushes adrenaline and cortisol into your bloodstream to mobilize fat from your body’s stores to fuel your muscles -- and your escape. The problem is, in modern society, you’re more likely to face an angry boss than a charging buffalo, so instead of fighting or fleeing, you’re left stewing in that toxic self-defense cocktail. The result: elevated blood pressure, higher cholesterol, and an increased likelihood of blood clots.

Now for some good news. Just as your body is equipped with a punch-and-run reflex during times of perceived danger, it also has a pretty good peacetime plan, known as the relaxation response, which gives your battle-weary nervous system some much-needed R&R. The catch: Like a day spent with your mind wrapped up in a novel and your toes nestled in warm sand, the relaxation response doesn’t just happen during everyday chaotic life. You have to pursue it -- and yoga is one of the best paths you can take.

As you draw in deep belly breaths and release built-up tension by extending your limbs through their full range of motion, focusing your thoughts on each pose, you flip the switch that deactivates the fight-or-flight system and engages the relaxation response. Your heartbeat slows and your blood pressure drops. Over time, if you practice regularly, you can even lower the “alert level” of your autonomic nervous system so that you’re walking around more relaxed all the time.

Like standard stretching, yoga also increases circulation and improves blood supply to the heart. With better blood flow, your heart doesn’t have to work as hard to deliver fresh nutrients and oxygen to your organs and muscles. By entering a relaxed state, you also increase your coronary blood flow by decreasing artery constriction.

As a side benefit, regular yoga stretching lengthens muscles and connective tissues, improving your flexibility and range of motion so you can enjoy heart-healthy aerobic and strengthening activities with less muscle soreness and chronic aches and pains.

Source : Readers Digest

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