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Vezelrijke voeding en bewegen tegen buikvet*
Uit een studie onder ruim elfhonderd mensen die vijf jaar lang gevolg werden blijkt dat zowel dagelijkse inname van voldoende oplosbare
voedingsvezels uit groenten en fruit als een paar keer in de week flink bewegen het buikvet flink kan doen slinken. Buikvet (visceraal vet) is niet het vet direct onder de huid doch het diep liggende vet in de buik rondom de organen en is veel gevaarlijker voor de gezondheid. Na afloop van de studie bleek dat over 5 jaar dagelijks iedere 10 gram extra oplosbare
vezels zorgde voor 3,7% minder buikvet. Zij die 2-4 keer per week een half uur flink deden bewegen verloren in die 5 jaar wel 7,4% buikvet. Geen
veranderingen werden gezien in het vet direct onder de huid.
Soluble Fiber Strikes A Blow To Belly Fat
All fat is not created equal. Unsightly as it is, subcutaneous fat, the fat right under the skin, is not as dangerous to overall health as visceral fat, the fat deep in the belly surrounding vital organs.
According to a new study by researchers at Wake Forest Baptist Medical Center, the way to zero in and reduce visceral fat is simple: eat more soluble fiber from vegetables, fruit and beans, and engage in moderate
activity.
The study found that for every 10-gram increase in soluble fiber eaten per day, visceral fat was reduced by 3.7 percent over five years. In addition, increased moderate activity resulted in a 7.4 percent decrease in the rate of visceral fat accumulation over the same time
period.
"We know that a higher rate of visceral fat is associated with high blood pressure, diabetes and fatty liver disease," said Kristen Hairston, M.D., assistant professor of internal medicine at Wake Forest Baptist and lead researcher on the study. "Our study found that making a few simple changes can have a big health impact."
Ten grams of soluble fiber can be achieved by eating two small apples, one cup of green peas and one-half cup of pinto beans; moderate activity means exercising vigorously for 30 minutes, two to four times a week, Hairston
added.
In the longitudinal study, published in the journal Obesity, researchers examined whether lifestyle factors, such as diet and frequency of exercise, were associated with a five-year change in abdominal fat of African Americans and Hispanic Americans, populations at a disproportionally higher risk for developing high blood pressure and diabetes and accumulating visceral fat.
At the beginning of the study, which involved 1,114 people, the participants were given a physical exam, an extensive questionnaire on lifestyle issues, and a CT scan, the only accurate way to measure how much subcutaneous and visceral fat the participants had. Five years later, the exact same process was repeated. Researchers found that increased soluble fiber intake was associated with a decreased rate of accumulated visceral fat, but not subcutaneous fat.
"There is mounting evidence that eating more soluble fiber and increasing exercise reduces visceral or belly fat, although we still don't know how it works," Hairston said. "Although the fiber-obesity relationship has been extensively studied, the relationship between fiber and specific fat deposits has not. Our study is valuable because it provides specific information on how dietary fiber, especially soluble fiber, may affect weight accumulation through abdominal fat deposits."
Hairston's next study, expected to be in clinical trials later this summer, will examine whether increasing soluble fiber with a widely available fiber supplement will produce similar results to those obtained in this study using soluble fiber from food.
Funding for the study was provided by the National Institutes of Health.
Source:
Wake Forest Baptist Medical Center (November 2011)
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