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Monday, July 04, 2005

Consumer Health Articles: FLUORIDE, THE SILENT KILLER

Consumer Health Articles: FLUORIDE, THE SILENT KILLER:

FLUORIDE, THE SILENT KILLER
by: Yiamouyiannis, John, Ph.D.

Dr. Yiamouyiannis received his Ph.D. in biochemistry from the University of Rhode Island and served his post-doctoral fellowship at the Western Reserve University School of Medicine. He then became editor at Chemical Abstracts Service, the world's largest chemical information center, where he first became aware of the health damaging effects of fluoride. He is the former science director of the National Health Federation; he is the executive director of Health Action and president of the Safe Water Foundation. He is a world-leading authority on the biological effects of fluoride and is responsible for ending the use of fluoride in many areas of the United States and abroad.

HARMFUL EFFECTS OF FLUORIDE Fluoride is used as an insecticide and a roach killer. Even at the level they use to fluoridate your public water supply, usually at the rate of about 1 part fluoride for every million parts of water (1 ppm) by weight, it causes severe problems. As little as one-tenth of an ounce of fluoride will cause death. It is more poisonous than lead and just slightly less poisonous than arsenic. No one will die from drinking one glass of fluoridated water, but it is the long term chronic effects of drinking fluoridated water that affects health. Dental fluorosis is one of the earlier signs of fluoride poisoning, appearing in mild cases as a chalky area on the tooth, and in more advanced cases, teeth become yellow brown or black and the tips break off. Fluoride in the drinking water leads to fluoride levels in tissues and organs which damage enzymes. This results in a wide range of chronic diseases. Fluoride weakens the immune system and may cause allergic type reactions including dermatitis, eczema and hives. It causes birth defects and genetic damage. Fluoride is likely to aggravate kidney disease, diabetes and hypothyroidism. The amount consumed in drinking water has been shown to lower thyroid activity in humans. It also causes the breakdown of collagen which results in wrinkling of the skin and the weakening of ligaments, tendons and muscles. There are a number of ways that fluoride can be administered. The most insidious way is through the drinking water. Some of you have it in your mouthwashes, or in your toothpaste, or you may take a fluoride supplement which is dispensed in pills or drops.

FLUORIDE A BY-PRODUCT OF INDUSTRY Fluoride is an industrial waste product, a by-product of the aluminum industry and the phosphate fertilizer companies who have mountains of fluoride that is polluting the ground water. They have to get rid of it, and the old solution to pollution is dilution - just put it in the drinking water. People living in the vicinity of aluminum, phosphate, steel, clay, glass and enamel plants are exposed to high levels of fluoride in the air. For instance, the Hamilton area shows extremely high lung cancer rates that decrease as you get away from the downwind plume of the steel mills. If fluoride was left with the phosphate and sold to farmers, it would kill their crops. That is what originally happened when they used this high fluoride phosphate, and the farmers said they were going back to manure.

FLUORIDATED TOOTHPASTE Unless it says on the package does not contain fluoride, you are using fluoridated toothpaste. Fluoridated toothpaste contains 1,000 ppm fluoride. There is enough fluoride at 1,000 to 1,500 parts per million to kill a small child if they consume the entire tube. If a child consumes just part of it, it could result in either acute or chronic toxicity. A four to six year-old child will swallow 25 to 33% of the toothpaste they put on their toothbrush. Don't let them put it in their mouth unless when they swallow it, it is good for them. People ask me where they can get non-fluoridated toothpaste. They have many brands of non-fluoridated toothpaste in health food stores, so pick up your toothpaste there, and make sure it doesn't have fluoride, because some health food stores have a couple of brands of fluoride toothpaste. Not everything in a health food store is safe. Always read the labels. Pepsodent toothpaste also doesn't have fluoride. If you want something inexpensive, use baking soda and sea salt, but make sure you dissolve the salt crystals in water before you brush your teeth; otherwise the salt crystals will score the enamel.

GUM DAMAGE Fluoride actually causes gum damage at the concentrations used in fluoridated toothpaste at 1,000 ppm. Fluoride poisons enzyme activity and slows down the ability of the gums to repair themselves. If you brush your teeth with fluoridated toothpaste, you will suffer gum damage.

FLUORIDE GELS AND SOLUTIONS Some schools have weekly fluoride mouth-rinse programs in which the children swish fluoride solutions around in their mouths. The fluoride comes in a sugar size packet, and on the outside of the packet it says fatal if swallowed. If your child is in any of these programs at school, get them out of it. We have testimonials one after the other of children who come home with a stomach ache because they had actually accidentally swallowed part of it, and children do accidentally swallow. Fluoride treatments at the dentist's office are equally hazardous. In the typical fluoride treatment, 10,000 parts per million fluoride, which comes in a flavoured gel to make it taste good, is left on the teeth for about five minutes. Then the child spits it out, though invariable he swallows some. The child cannot rinse, eat or drink for at least half an hour afterward. Children have died after swallowing fluoride topically applied on their teeth. In one well publicized case, the dental hygienist neglected to tell the child to wash his mouth out and spit out the solution. The child began vomiting and sweating and died the same day. Over 6% of children receiving fluoride treatments at the dental office suffer gastrointestinal distress such as nausea, vomiting, diarrhea and abdominal pain either immediately or within one hour after treatment. According to scientists at the U.S. Public Health Service, topical fluoride is practically ineffective in reducing tooth decay, and damages gum tissue. According to the American Association for the Advancement of Science, "the high concentrations of some products (gels, mouthwash, tablets, toothpaste, etc.) may be neither biologically desirable nor clinically necessary".

FLUORIDE SUPPLEMENTS Tablets and drops are another means of administering fluoride. The Canadian Dental Association has admitted in the last couple of years that children under the age of three should not be given fluoride supplements. And yet dental practitioners and pediatricians who haven't kept up to date are still giving fluoride supplements to young children. I advise against fluoride supplements for anyone.

ADDITION OF FLUORIDE TO PUBLIC WATER SYSTEMS The addition of fluoride to the public water supply is the most insidious way of chronically poisoning hundreds of millions of people around the world. Dr. Dean Burk was former chief chemist of the National Cancer Institute, and has co-authored studies with many Nobel prize winners including Otto Warburton, and he is the co-author of the most cited paper in the entire field of biochemistry - the Lineweaver-Burk Enzyme Kinetics. In the 1970s, Dean Burk and I conducted a number of studies which linked fluoride and cancer. There was already scientific evidence from the 1950s that fluoride was causing cancer, and a 1963 study by Driscowitz and Norton showed that increased fluoride concentrations in the media of experimental animals increased tumour incidence from 12% at the lowest concentrations up to 100%. Taylor and Taylor published a study in 1965 at the University of Texas in all the mainline medical journals showing that 1 ppm or even 0.5 ppm increased tumour growth rate by 25%. These studies bothered me and around 1975 I found that we had enough data to compare the cancer death rate before and after fluoridation of fluoridated communities and compare them to non-fluoridated communities. Based on millions of subjects, the study showed a 5 to 10% increase in cancer death rate within three to five years after fluoridation was put into the water after correcting for various demographic factors like age, race and sex. All the variables were controlled. We followed this by a series of other studies. In 1977 we had full blown Congressional Hearings, and Congress stated: "We can no longer assure the American public that fluoride does not cause cancer". Dean Burk and other well-known scientists were there, and on the opposing side was the American Dental Association. Ten years later, Proctor and Gamble, makers of Crest toothpaste found that fluoride was causing precarcinogenic changes in cells.

HOW FLUORIDE AFFECTS THE DNA REPAIR MECHANISM Epidemiological evidence shows that fluoride causes cancer. It does this in several ways. It can actually cause the original lesion. In each one of our cells we have genetic material called DNA, and this DNA is double stranded, it has a helix shape and these two strands of DNA are held together by semi strong bonds called hydrogen bonds. Hydrogen bonds also hold proteins together. Fluoride goes in and breaks those hydrogen bonds, and consequently destabilizes DNA. It can't cause a lesion in the DNA itself, but if it is in a site of the cell that regulates cell growth, it will cause uncontrolled cell growth. A few minor modifications will give you first a tumour, and secondly an invasive tumour or cancer. So fluoride has the ability to actually cause the cancer. We have a marvelous system of repair and rejuvenation. Even if we go out in the sun, even if we have a lesion by fluoride itself, we have what is called a DNA repair enzyme system. So any lesion caused by the sun or ultra-violet light will be repaired. The DNA repair enzyme system will cut off the ends and use the complementary strand to repair itself and make intact genetic material. The unfortunate thing is that one part per million fluoride, the amount of fluoride that they use in the public water system, depresses the DNA repair system by 50%. So they have attacked us on the first defense of damage to our genetic material. Since people can get cancer from so many different causes, fluoride is just increasing our chances of getting cancer.

THE IMMUNE SYSTEM Even if the cancer cell starts dividing and invading surrounding tissues, if our immune system is strong enough, it will kill those cancer cells without any remedies, without chemotherapy, without anything and will destroy the occasional cancer that maybe all of us have had at one time or another. Once in a while cancer breaks through when the immune system is low or the DNA repair enzyme system is down, and we will get cancer. Fluoride causes the lesion; it inhibits the DNA repair enzyme, and then inhibits our immune system by 30 to 70%. And that occurs at only one part per million. How does it do that? Our immune system is composed of white blood cells including phagocyte cells that are carried in the blood system. If there is an infection or cancer or some foreign agent, these phagocytes will go to that area and start engulfing and destroying this bad agent whether it is a cancer cell or a bacterium or virus. It engulfs it in a little pocket called a lysosome which squirts enzymes and breaks down the bad agent into little pieces. They have other things called peroxisomes which burn that agent with free radicals and either destroy it or use it for building new and healthy cells. These phagocytes will actually eat up bacteria or viruses, and toxic substances are just thrown off. Studies from the University of Glasgow show that fluoride inhibits these white blood cells. Fluoride at levels below one part per million causes a chronic release of these free radicals from the white blood cell out into the blood stream where it starts slowly damaging your body by increasing free radicals. This is one of the reasons why we call fluoride the ageing factor.

NON-FLUORIDATED WATER Industrial quality reverse osmosis water brings the total dissolved solids down to less that one part per million for all the pollutants that might be in there. Distilled water will remove 99% of the fluoride all of the time. I also recommend a pre-charcoal filter on a distiller to remove volatiles so that you are not getting noxious gases in your home. These are worse when you inhale them than when you drink them, because they go right into your blood stream and into your lungs. You can buy your water at the supermarket, but quite frankly you don't know what the quality of the water is. You must take care that the fluoride concentration is less than 0.2 ppm. Some spring waters like Vichy (which contains 8 ppm) are notoriously high in fluoride. Avoid beverages such as soft drinks, beer and fruit juices from concentrate that have been bottled in fluoridated areas. Teas, even brewed in fluoride-free water will contain about 1.2 to 2.4 ppm fluoride. Some people drink 8 to 15 cups of tea a day, and these amounts are large enough to cause dental fluorosis and other harmful effects.

MINERALS IN WATER If you want to get minerals, you must get them in the proper balanced ratio. Calcium, magnesium, phosphorus and other minerals must be in a ratio that is acceptable to a living organism. Get your minerals from healthy living organisms like vegetables, grains, nuts and seeds, and if you are not a vegetarian, like meats, bones or bonemeal. Beet greens are at the top of the list as a mineral supplement. I don't recommend milk or dairy as a calcium source; cow's milk has a very different constitution than human milk.

DETOXIFICATION If you stop taking fluoride, your body will get rid of it eventually. The fluoride that gets stuck in your bones gets stuck there for life pretty much, but that is not necessarily bad. Where fluoride has adverse effects is in the soft tissues. If you take over 200 mg of vitamin C per day that is all you really need for removing fluoride. In three to six months you should have about 99% of it out which is good enough.

GOOD DIET, NOT FLUORIDE, IS NECESSARY FOR HEALTHY TEETH Many primitive societies whose drinking water contains negligible amounts of fluoride go through life without tooth decay because they eat very little sugar and other refined carbohydrates.

DOES FLUORIDE REDUCE TOOTH DECAY? Numerous attempts have been made to show that the amount of fluoride used to fluoridate public water systems reduces tooth decay under laboratory conditions. Still no laboratory study has ever shown that this amount of fluoride is effective in reducing tooth decay. Further, there are no epidemiological studies on humans showing that fluoridation reduces tooth decay that meet the minimum requirements of scientific objectivity such as the double blind design.

Exercise Grows New Brain Cells | LiveScience

Exercise Grows New Brain Cells | LiveScience:

Exercise Grows New Brain Cells

By Jeanna Bryner, LiveScience Staff Writer

posted: 28 June 2007 12:25 pm ET

Exercise stimulates the growth of new brain cells, a new study on rats finds. The new cells could be the key to why working out relieves depression.

Previous research showed physical exercise can have antidepressant effects, but until now scientists didn’t fully understand how it worked.

Astrid Bjornebekk of the Karolinska Institute in Sweden and her colleagues studied rats that had been genetically tweaked to show depressive behaviors, plus a second group of control rats. For 30 days, some of the rats had free access to running wheels and others did not.

Then, to figure out if running turned the down-and-out rats into happy campers, the scientists used a standard “swim test.” They measured the amount of time the rats spent immobile in the water and the time they spent swimming around in active mode. When depressed, rats spend most of the time not moving.

“In the depressed rats, running had an antidepressant-like effect after running for 30 days,” Bjornebekk told LiveScience. The once-slothful rodents spent much more time in active swimming compared with the non-running depressed rats.

The researchers also examined the hippocampus region of the brain, involved in learning and memory. Neurons there increased dramatically in the depressed rats after wheel-running.

Past studies have found that the human brain’s hippocampus shrinks in depressed individuals, a phenomenon thought to cause some of the mental problems often linked with depression.

“The hippocampus formation is one of the regions they have actually seen structural changes in depressed patients,” Bjornebekk said.

Running had a similar effect as common antidepressants called selective serotonin reuptake inhibitors (SSRIs) on lifting depression.

The research is published in the International Journal of Neuropsychopharmacology.

Friday, July 01, 2005

U.S. Corporations Keeping Biowarfare Work Secret

U.S. Corporations Keeping Biowarfare Work Secret:
In case you didn't know it, the White House since 9/11 has called for spending $44-billion on biological warfare research, a sum unprecedented in world history, and an obliging Congress has authorized it. Thus, some of the deadliest pathogens known to humankind are being rekindled in hundreds of labs in pharmaceutical houses, university biology departments, and on military bases. An international convention the U.S. signed forbids it to stockpile, manufacture or use biological weapons. But if the U.S. won't say what's going down in those laboratories other countries are going to assume the worst and a biowarfare arms race will be on, if it isn't already. Sunshine says failure to disclose operations also puts corporate employees involved in this work at risk. Only 8,500, or 16%, of the 52,000 workers employed at the top 20 U.S. biotech firms work at an NIH guidelines-compliant company, Sunshine says.

Francis Boyle, an international law authority at the University of Illinois, Champaign, says pursuant to national strategy directives adopted by Bush in 2002, the Pentagon "is now gearing up to fight and 'win' biological warfare without prior public knowledge and review." Boyle said the Pentagon's Chemical and Biological Defense Program was revised in 2003 to endorse "first-use" strike in war. Boyle said the program includes Red Teaming, which he described as "plotting, planning, and scheming how to use biowarfare."

Besides the big pharmaceutical houses, the biowarfare buildup is getting an enthusiastic response from academia, which sees new funds flowing from Washington's horn of plenty. "American universities have a long history of willingly permitting their research agenda, researchers, institutes and laboratories to be co-opted, corrupted, and perverted by the Pentagon and the CIA," Boyle says. What's more, the Bush administration is pouring billions in biowarfare research while some very real killers, such as influenza, are not being cured.In 2006, the NIH got $120 million to combat influenza, which kills about 36,000 Americans annually but it got $1.76 billion for biodefense, much of it spent to research anthrax. How many people has anthrax killed lately? Well, let's see, there were those five people killed in the mysterious attacks on Congress of October, 2001 --- attacks that suspiciously emanated from a government laboratory at Fort Detrick, Md.

Pollution May Cause Premature Death

Pollution May Cause Premature Death

Michelle L. Bell, PhD
Yale School of Forestry & Environmental Studies

I n a recent finding elevated ozone levels were associated with spikes in the number of deaths in 95 areas around the country. People ages 65 to 74 had a slightly higher risk of death from pollution than younger people. Self-defense: Check pollution forecasts at www.epa.gov/airnow. On days with high ozone concentrations, avoid congested streets, where car emissions cause ozone buildup, and don't exercise outside.

Friday, June 17, 2005

How to Beat Proscrastination... in a Minute or Less

How to Beat Proscrastination... in a Minute or Less

Jeff Davidson
Breathing Space Institute

Everyone procrastinates about some things, and most of us have areas in our lives where we don't procrastinate at all. But for millions of us, procrastination is a serious obstacle to performance.

Studies of employees at corporations suggest that employees may engage in actual work for less than five hours a day. The rest of the time is spent preparing to work, but not actually doing it. One study found that about 90% of participants procrastinate on occasion, and about 25% chronically put things off.

It's getting worse. People today are flooded with information -- news, E-mails, instant messaging, Internet databases, etc. The constant flow of information means that more matters compete for attention at any given time. It's easier than ever to put things off until a later date or, in some cases, not do them at all.

What You Are
vs. What You Do

Even though procrastinators tend to have deep-seated traits in common, such as fear of failure or the urge for perfection, the tendency to put things off is mainly due to habits -- and habits can be changed.

As a management consultant, I have spent decades helping individuals, small businesses and corporations manage their time more efficiently. My experience shows that among the hundreds of popular tricks for beating procrastination, there are only a few that really work. Most of these techniques can be put into practice in one minute or less. Among the best...

Set Specific Goals

Many people don't really make a distinction between their priorities and their goals. That's a mistake -- you need both to work efficiently.

Priorities are big-picture intentions. They are things you want to achieve at some point, such as becoming healthier or getting a promotion. Priorities tell you where you want to go, but don't provide a roadmap for getting there.

People who focus only on priorities don't get a lot done because they don't have specific action plans to follow. For that, you need goals.

Goals support priorities. They're specific ways to accomplish what's important to you.

Example: Suppose that your priority is to "be healthy." There's not much you can do to achieve that on any given day. What you can achieve are specific goals that make the priority possible. "I'll get to the gym on Wednesday for a 40-minute workout." This is a good goal because it's both specific and includes a time line for completion.

Another example: Maybe you're stuck in middle management and want to take the next step up the corporate ladder. This is the type of priority that will probably require dozens of individual goals to achieve. You might decide, for example, to take one university management class each semester... make an appointment to tell your boss that you're willing to take extra assignments... or introduce yourself to key players in other departments in the next two days.

AVOID Information Overload

Do you try to collect every available piece of information before making a decision? Since there's always more to know, you may find yourself procrastinating -- and missing opportunities.

Solution: Trust your instincts. This isn't the same as acting on a whim. It means collecting enough information to make an informed decision, while at the same time trusting the knowledge and information that you've accumulated over the years. One study looked at the use of information in making decisions. Two groups at a company were asked to buy a large piece of equipment. Participants in one group were given large amounts of data -- analysis, articles, spec sheets. Those in a second group had to decide with very little data. After the equipment had been bought and installed, both groups reviewed their decisions. Surprisingly, the group that had based its decision more on general knowledge and instinct than on data was as satisfied, if not more so, with its decision.

Don't Wait to be in the Mood

Can you imagine a pilot saying, "I'm not in the mood to land the plane," or a heavyweight contender saying, "I'm not in the mood to fight tonight"? You hear this kind of thing all the time from procrastinators.

The brutal truth: Most successful people produce on schedule, regardless of how they happen to be feeling. The reality of today's competitive world is that there isn't time (or money) to postpone projects until someone happens to feel like doing them.

Helpful: Start projects even when you aren't feeling particularly energized or creative. Force yourself to do something -- anything. Most people find that they get "in the mood" once the work is under way, even when they didn't feel that way initially.

Preview Information

Suppose it's late Friday, and you know you have to tackle a project the following Monday -- and you're dreading it.

Try this: Preview the information beforehand. Flip through files or brochures. Start a rough outline of what you're going to do and some of the issues you need to think about. Glance at a few articles. Then put it all away, and don't look at it again during the weekend.

Previewing material allows the subconscious mind to start preparing... generating ideas... and letting plans take root. When it's time to actually start the project on Monday, you'll already be familiar with the material, which results in less anxiety -- and less need to procrastinate.

TRY the Three-to-Five Method

This approach was pioneered by time management guru Alan Lakein. When you're launching a new project, identify three to five elements that you can complete quickly and easily -- and get an immediate "win."

Suppose you've been putting off a task at home -- say, raking the leaves. Identify three to five "mini-jobs" that have to be done -- getting plastic bags ready... finding the rake... getting your work gloves out of the garage, etc.

Every task has multiple entry points. Don't start with the hardest parts first. Start with something easy. Once you get going, the rest of the project will fall into place more easily.

Helpful: Set short time limits initially. Pick an entry point that will only take, say, four minutes. Short projects are mentally easier to start -- and most people just keep going without watching the clock.

Procrastinate CREATIVely

If you're not ready to launch into a big project, don't just dawdle. Fill the time by completing easier tasks not directly related to the project that will eventually need attention.

Example: Rather than immediately trying to decipher complicated forms at tax time, take care of unpaid bills, file medical insurance forms, answer correspondence, etc. These "warm-up" tasks have to be done -- and doing them initially is like a mental stretching exercise that creates a state of preparedness for the larger, more complicated job to come.

Plot a Course

It's easy to procrastinate when you lack either a clear starting point or a logical set of steps to take. A lack of direction produces much of the anxiety that precedes starting any project.

Helpful: Jot down the main steps that the project requires. (You'll probably add or subtract steps along the way.) Scratch out each step as you're done, so you can track your progress.

Even if you're one of those people who can map things out mentally, writing down individual steps "decongests the brain" and allows you to focus your mental energy on the individual steps, rather than worrying about the entire process. Suddenly, a daunting task looks smaller and easier.


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Bottom Line/Retirement interviewed Jeff Davidson, founder and president, Breathing Space Institute, a time- and efficiency-management consulting firm in Chapel Hill, North Carolina (www.breathingspace.com). He is author of The 60 Second Procrastinator (Adams Media) and The Complete Idiot's Guide to Managing Your Time (Alpha).

Tuesday, June 07, 2005

Practice of Medicine'

"Why It's Called the 'Practice of Medicine'

When I was growing up, people drank milk to heal their ulcers, my mother fed me a healthy breakfast of scrambled eggs, and teachers asked me to memorize the nine planets, starting with Mercury and ending with Pluto. All this was based on what we knew as science -- and the facts were the facts. Or were they? As time went on, scientists learned that ulcers were often caused by helicobacter pylori (H. pylori) bacteria and that dairy could aggravate digestive disorders. Eggs lost favor because they were a source of cholesterol, and now Pluto is not considered an official planet after all. Today, coming full circle, eggs are back on the menu, considered healthy once again.

So-called "facts" change quickly, as science is replaced by newer science. Though we are encouraged to believe that medicine is an exact science, truth be told all medical knowledge -- for that matter, all scientific knowledge -- is only the experts' best "educated guess" based on what they know today and the scientific data they currently have. As we learn more, new questions arise -- and we discover unanticipated new answers, too. Given how much information is directed at us in the area of medical knowledge and practice, how can a health-conscious consumer make the smartest choices?"

Wednesday, June 01, 2005

Clinical Trial: Yoga: Effect on Attention in Aging & Multiple Sclerosis

Interesting, Clinical Trials with Yoga to help with MS..... and where would you think they are doing this, lol... where else:
Dr. Barry S. Oken, Principal Investigator, Oregon Health and Science University Oregon Health Sciences University/Neurology, Portland, Oregon, 97201, United States



Clinical Trial: Yoga: Effect on Attention in Aging & Multiple Sclerosis: " Purpose
Changes in visual attention are common among elders and people with multiple sclerosis. The visual attention changes contribute to difficulty with day to day functioning including falls, driving and even finding one's keys on the kitchen counter as well as contributing to deficits in other cognitive domains. Yoga emphasizes the ability to focus attention and there is some evidence that the practice of yoga may improve one's cognitive abilities. Additionally, yoga practice may improve cognitive function through other non-specific means such as improved mood, decreased stress or declines in oxidative injury. We propose a randomized, controlled 6 month phase II trial of yoga in two separate cohorts: healthy elders and subjects with mild multiple sclerosis. We will determine if yoga intervention produces improvements on a broad attentional battery that especially emphasizes attentional control. To further understand the reported beneficial effect of yoga on its practitioners, we will also determine if there is a positive impact on measures directly related to yoga practice (flexibility and balance) as well as mood, quality of life and oxidative injury markers. The yoga intervention consists of a Hatha yoga class meeting twice per week. The class is taught by experienced yoga teachers who are supervised by a nationally known yoga instructor. There are two control groups. An exercise group will have a structured walking program prescribed by a certified Health and Fitness Instructor and Personal Trainer. The program will attempt to match the Hatha yoga class for metabolic demand. The second control group will be assigned to a 6 month waiting list. The outcome measures are assessed at baseline and after the 6 month period. The primary outcome measures are alertness (quantitative EEG and self-rated scale), ability to focus attention (Stroop) and ability to shift attention (extradimensional set shifting task). Secondary attention outcome measures include the ability to sustain attention (decrement in reaction time) and ability to divide attention (Useful Field of View). Other secondary outcome measures include flexibility, balance, mood, quality of life, fatigue (in MS cohort) and decreased markers of lipid, protein, and DNA oxidative injury. "