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Older women improve health with just modest weight loss |
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Monday, 04 December 2006 |
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A new academic study from Italy shows that obese women who lose just 5% of their body weight see a significant improvement in their health, with better body fat distribution and a reduced risk of diabetes.
The study, conducted by Dr. Gloria Mazzali of the University of Verona and published in the American Journal of Clinical Nutrition, involved 35 women aged between 59 and 83 years old, and was designed to investigate the relationship between body fat and insulin resistance, an indicator of diabetes. 15 of the women followed a calorie controlled diet and lost about 5% of their body weight.
As people get older, the amount of fat around their abdominal area increases, along with the fatty tissue content of their muscles. It is the changed fat distribution in the body that is linked to developing an increased resistance to insulin, and hence diabetes.
The study team found that the more fat that was carried around the woman's waist and abdominal area, the higher the likelihood of her being resistant to insulin. However, as the obese women in the study lost weight, their fat distribution in the body became healthier, and their sensitivity to insulin increased, lowering their risk of developing diabetes. However, the women who lost weight did not suffer any decrease in muscle tissue, enabling them to exercise more easily.
Since conventional wisdom typically suggests that older people are healthier when they carry a little more weight to compensate for reduced muscle mass that accompanies ageing, this study actually contradicts this view, according to Dr. Dympna Gallagher, of the Obesity Research Center at St. Luke's Roosevelt Hospital in New York, who stated: "These data provide no evidence that age should be considered a risk factor for modest weight loss in obese older persons."
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