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Obese
children are 53 times more likely to have insulin resistance,
a syndrome that often precedes development of Type II diabetes and can
cause other problems as well, according to a study by the University of
North Carolina at Chapel Hill.
Researchers studied 688 children (11-14 years) and
looked at the following heart disease risk factors that together are considered
hallmarks of insulin resistance:
- Elevated triglycerides or low levels of HDL ("good")
cholesterol
Researchers found the following:
- Children with only one of the
above risk factors were 2 to 6 times more likely to be obese.
- Children with
two risk factors were 8 to 14 times as likely to be obese.
- Children who were obese were
53 times more likely to have insulin resistance (including all three
risk factors)
JoAnne Harrell, a professor of nursing at the university
who headed the trial, says she is shocked at the results, claiming that
the increased risk of insulin
resistance among obese children was 7 times the rate she was expecting
to find.
"It didn't matter how the children got obese,
whether it was through overeating or inactivity. The key correlation was
just being obese," Dr. Harrell said.
Considering the fact that insulin
resistance is typically present but unknown for about a decade
before Type II diabetes is diagnosed, Dr. Harrell predicts
that a wave of obese American children could be confronting the dangerous
disease. "Overall, less than 1 percent of American children now have
diabetes. But that could change if we continue to produce obese children,"
said Dr. Harrell, who estimated that obesity rates have doubled in the
past decade.
Researchers found disturbing dietary traits among
the obese children. "Sweets and fats are supposed to be at the peak
of the [USDA food] pyramid, only to be used sparingly. But in the children
I studied, they were the base of the pyramid, with an average of nine
servings a day," Dr. Harrell said.
In addition, she theorized many children were also
growing fat because of sedentary activities like watching TV and playing
on the compute, as well as a trend towards elimination of physical education
classes in school.
Annual Scientific Sessions
of the American Heart Association, November, 2000, New Orleans, Louisiana
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