February 27th, 2011 by Glenn Laffel, M.D., Ph.D. in Better Health Network, Research
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Most people know that the U.S. is struggling to contain a surging epidemic of obesity, and that the problem is most acute among African-Americans. Whereas about 27 percent of all adult Americans are obese (defined as having a body mass index of 30 or more), fully 37 percent of African-American adults are obese, and that number jumps to an appalling 42 percent among African-American women.
Over the years, public health officials have provided evidence that socioeconomic and cultural factors drive this racial disparity. Now, a new study suggests there is another reason as well: Obese African-Americans receive less obesity-related counseling than their white counterparts, and it matters not whether the physicians they see are African-American or white.
To reach these conclusions, Sara Bleich and colleagues from the Johns Hopkins School of Public Health used clinical encounter data from the 2005–2007 National Ambulatory Medical Care Surveys (NAMCS). The sample included 2,231 visits involving African-American and white obese people who were at least 20 years old and who visited family practitioners and internists that were either African-American or white. Asian and Hispanic patients and physicians were excluded from the study because their numbers were too small to permit hypothesis testing.
For each encounter in the study, the scientists determined whether the patient received guidance on weight reduction, diet and nutrition, or exercise from his or her physician. Read more »
*This blog post was originally published at Pizaazz*
February 12th, 2011 by Jennifer Wider, M.D. in Better Health Network, Health Tips
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Obesity levels are at an all-time high among men, women, and children in the United States. The need for good nutrition and regular exercise is paramount for maintaining proper health and for keeping those extra pounds at bay, especially for women.
Beginning in her late 20s and 30s, a woman’s average body weight climbs steadily each year. This increase usually continues into her 60s. For many women, the weight gain is between one to two pounds per year with some women gaining more, and others less.
Aside from weight loss, women who incorporate regular exercise into their daily schedules may lower the risks of certain diseases and conditions. A recent study presented at the Ninth Annual AACR Frontiers in Cancer Prevention Research Conference revealed that women who exercised for at least 150 minutes a week significantly reduced their risk of endometrial cancer, regardless of their body size.
The Journal of the American Medical Association (JAMA) revealed that in order to prevent weight gain, an average woman who eats a normal diet needs 60 minutes of moderate exercise per day. If a woman is overweight or obese, 60 minutes of exercise is inadequate to keep off the weight, according to the study. In many cases she will have to modify her diet, including cutting down on overall daily caloric intake.
For older women, a dose of regular moderate exercise may slow the progression of age-related memory loss. A study published in the Proceedings of the National Academy of Sciences revealed that exercise may even reverse changes in the brain due to the aging process. Other recent studies prove a positive correlation between exercise and a lower risk of colon cancer. Read more »
*This blog post was originally published at Society for Women's Health Research (SWHR)*
February 11th, 2011 by John Mandrola, M.D. in Opinion, Research
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I’d like to talk about how rodents, relationships, and riding relate to overall health and wellness.
This idea comes from a nicely-written New York Times piece entitled, “Does Loneliness Reduce the Benefits of Exercise?” Here, Gretchen Reynolds reviews a few intriguing studies about how relationships may affect exercise, stress hormone levels, and intelligence. The combo caught my eye.
Anyone who pays attention to wellness knows that exercise produces more flexible arteries, more durable hearts, and leaner body shapes. These benefits are obvious, and honestly, sometimes a bit tiresome to write about.
To me, a far more interesting — and lesser known — benefit of regular exercise is that it might make us smarter. Here’s where the rodents come into the story.
As was summarized in the New York Times piece, when researchers allowed rats and mice access to running wheels they observed (a) that they all ran, and (b) those rats that did run scored better on rodent IQ tests, and actually grew more brain cells. This is a striking finding because nerve cells — unlike blood, GI and skin cells, which turnover rapidly — grow very slowly, if at all.
But that’s not the entire story. The Princeton researchers wanted to know whether the rat’s social relationships could have measurable biologic effects.
It turns out that rodents — like humans — are quite social. So social, in fact, that in these trials the brain-growing effect of exercise was blunted when rodents lived alone. Compared to rats and mice that lived in groups, those that were kept in isolation failed to grow new nerve cells in response to exercise. And importantly, isolated rats produced higher levels of stress hormones than those who lived in groups, even though both groups ran the same distance. Read more »
*This blog post was originally published at Dr John M*
February 2nd, 2011 by Jennifer Shine Dyer, M.D. in Health Tips, Opinion
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As a pediatric endocrinologist, I am on the frontline of the childhood obesity epidemic. In fact, I am now seeing 100-pound two year olds and 150-pound three-year-old kids in my clinic and I am concerned. The obesity epidemic is perpetuated by a processed food-culture that lacks healthier local whole foods.
Diets dominated by processed foods (refined carbohydrates with high fat- and/or high-sugar content and artificial ingredients) over whole foods (fruits, vegetables, whole grains) spur more obesity and diabetes, and have even been shown to negatively change gene expression of the offspring during pregnancy. All-processed ingredients reflect the balance of desirable factors in the modern way of life such as shelf life (long), taste (sweet), texture (fat) convenience (high), and price (low) — all profitable, all less nutritious, and all with a mass-marketed, generic, “cultureless” appeal that reduces emphasis on local cultures and flavors.
The recent rise of social networking is testament to the fact that people are hungry to connect and yearn to be culturally inspired. Culture (art, food, music) deeply connects people and transcends time, politics, and poverty because it is the language of being human — and something that never changes. Medical research as well as the positive embracing of First Lady’s “Let’s Move” campaign demonstrates an open mind to the idea of a healthier culture and readiness for change. In fact, many of the families that I meet in my clinic are interested in considering whole-food choices, but lack knowledge and guidance.
Food-culture change offers the best hope for transforming obesity and what Americans eat. Oprah’s recent vegan-whole-food-challenge show on February 1st is a step in the right direction and will help to propel the emerging whole-foods movement. Columbus, Ohio is emerging as a center for local whole-foods activism and food-culture change. Just in 2010, the Mid-Ohio Regional Planning Commission released the Central Ohio Local Food Assessment and Plan — the first plan of its kind in the nation — and received an $885 million US. Department of Housing and Urban Development (HUD) grant to create an urban foodscape in one of Columbus’ most blighted neighborhoods. Read more »
February 2nd, 2011 by PJSkerrett in Book Reviews, Health Tips
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There isn’t much new in the latest iteration of the “Dietary Guidelines for Americans.” Three years in the making, the 2010 guidelines (released a tad late, on January 31, 2011) offer the usual advice about eating less of the bad stuff (salt; saturated fat, trans fats, and cholesterol; and refined grains) and more of the good stuff (fruits and vegetables; whole grains; seafood, beans, and other lean protein; and unsaturated fats). I’ve listed the 23 main recommendations below. You can also find them on the “Dietary Guidelines” website.
The guidelines do break some new ground. They state loudly and clearly that overweight and obesity are a leading nutrition problem in the United States, and that a healthy diet can help people achieve a healthy weight. They also ratchet down sodium intake to 1,500 milligrams per day (about two-thirds of a teaspoon of salt) for African Americans and people with high blood pressure or risk factors for it, such as kidney disease or diabetes. But the guidelines also leave the recommendation for sodium at 2,300 milligrams a day for everyone else, a move that the American Heart Association and others call “a step backward.”
Vague language spoils the message
One big problem with the guidelines is that they continue to use the same nebulous language that has made previous versions poor road maps for the average person wanting to adopt a healthier diet.
Here’s an example: The new guidelines urge Americans to eat less “solid fat.” What, exactly, does that mean — stop spooning up lard or Crisco? No. Solid fat is a catchphrase for red meat, butter, cheese, ice cream, and other full-fat dairy foods. But the guidelines can’t say that, since they are partly created by the U.S. Department of Agriculture USDA), the agency charged with promoting the products of American farmers and ranchers, which includes red meat and dairy products. “Added sugars” is another circumlocution, a stand-in for sugar-sweetened sodas, many breakfast cereals, and other foods that provide huge doses of sugar and few, or no, nutrients. Read more »
*This blog post was originally published at Harvard Health Blog*
