ORLANDO, FLA., Nov. 17, 2009 — Some obese people misperceive that their body size is normal and think they don’t need to lose weight, according to research presented at the American Heart Association’s Scientific Sessions 2009.
In the Dallas Heart Study of 5,893 people, researchers found that 8 percent of the 2,056 who were obese said they were satisfied with their body size or felt they could gain weight.
“Almost one in 10 obese individuals are satisfied with their body size and didn’t perceive that they need to lose weight,” said Tiffany Powell, M.D., lead author of the study and a cardiology fellow at the University of Texas Southwestern Medical Center in Dallas. “That is a sizeable percentage who don’t understand they are overweight and believe they are healthy.”
In a new study, researchers analyzed data from the National Health and Nutrition Examination Survey (NHANES) from 1988–2006, representing 8,264 adult men and women, 20 to 85 years old. All had complete risk factor profiles of their blood pressure, fasting glucose, low density lipoprotein (LDL or “bad” cholesterol) and smoking status.
Researchers found that during this time period, the average body mass index (BMI) increased from 26.5 to 28.8 kg/m2, a significant change. BMI – a measure of body fatness – is calculated by dividing a person’s weight in kilograms by height in meters squared. In the same period, the number of people with optimal blood pressure decreased from 48 percent in NHANES III, 1988–94, to 43 percent in NHANES in 2005–06, and the number of people with optimal fasting glucose decreased from 67 percent to 58 percent. Both blood pressure and blood glucose are closely linked to obesity and these adverse trends track with the change in body weight.
|Share |||Randall Parker, 2009 November 22 08:12 PM Aging Weight Studies|