Weight control and exercise. Cardinal features of successful preventive gerontology.
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OBJECTIVE: Young women in the United States and Western Europe are notoriously concerned about weight but less is known about attitudes to weight in other regions of the world. This study explores the associations between body mass index (BMI), weight perceptions, and attempts to lose weight in male and female university students from 22 countries. METHODS: Data were collected from 18,512 university students, using standardised methods, as part of the International Health Behaviour Survey. Measures included weight, height, perception of overweight, and weight loss status. BMI was calculated from weight and height, but was categorised into gender and country-standardised deciles rather than the conventional weight categories in response to the inaccuracy of self-reports. Perceived overweight and weight loss status were plotted against country-standardised BMI deciles. The 22 countries were grouped into five geopolitical/economic areas for regional analyses: North-Western Europe and the USA, Central and Eastern Europe, the Mediterranean, Pacific Asia, South America. Perceived overweight compared across the five regions. RESULTS: Perceived overweight increased systematically across BMI deciles in all countries. More women than men felt overweight at any decile. Women had low levels of perceived overweight in the lowest decile but rates rapidly increased to 50% by the 5th decile. Men, even in the highest deciles, were less aware that they are overweight and few of them were trying to lose weight. Women had a faster rise of weight loss attempts over the BMI deciles but nevertheless the proportion trying to lose in the highest decile did not exceed 75%. Perceived overweight profiles across BMI deciles were similar across all regions, suggesting that perceptions of overweight derive from local comparisons. The patterning for trying to lose weight was more diverse, with men and women from Asian countries showing higher levels of trying to lose weight at all deciles. CONCLUSIONS: This study shows the international consistency in perceptions of overweight in educated young men and women across diverse regions of the world. It confirms the patterning of women's overestimation of weight at lower BMI deciles and men's underestimation of weight at the higher deciles. Perceptions of overweight and attempts to lose weight were highest in the group of Asian countries where body weights are generally low, suggesting that local culture and norms could moderate attitudes to weight.
An infusion of Campomanesia xanthocarpa Berg. (Myrtaceae) leaves (Guabiroba) and the herb Cuphea carthagenensis (Jacq.) J.F. Macbr. (Lythraceae) (Sete-sangrias) is traditionally used in the South of Brazil to treat high levels of cholesterol and triglycerides. The effects of the aqueous extracts of these herbs were investigated in rats fed on a high calorie diet. Chronic treatment with the Guabiroba aqueous extract induced a significant reduction in weight gain in the rats, compared to the control group. Also, biochemical analysis showed that this treatment reduced the glycemia, while no effects on lipidic levels were observed. The biochemical analysis of the animals treated with Sete-sangrias aqueous extract showed no effect on glucose and triglyceride levels, while chronic treatment with the Sete-sangrias aqueous extract induced a significant reduction in plasma cholesterol in rats.
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Morbid obesity has become a health crisis in the United States. Medical programs developed at nonoperative attempts to lose (and maintain) an adequate weight loss are largely unsuccessful. Bariatric surgery has been proven to be effective at inducing and maintaining a satisfactory weight loss to decrease weight-related comorbidity. Bariatric operations include procedures that decrease mechanically the volume capacitance of the proximal stomach (vertical banded gastroplasty, laparoscopic gastric banding) or decrease the proximal gastric capacitance and establish a partial selective malabsorption (gastric bypass and its modifications, partial biliopancreatic bypass, and duodenal switch with partial biliopancreatic bypass). These operations should induce a loss of at least 50% (or more) of excess body weight. Not all patients are candidates for these procedures, and the best results are obtained by a multidisciplinary team (including nutritionist, physician, dietitian, psychologist or psychiatrist interested in eating disorders, and surgeon).
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