جستجوی مقالات مرتبط با کلیدواژه « dietary energy density » در نشریات گروه « پزشکی »

Dietary Energy Density (DED), defined as the energy content of foods (kJ or kcal) per unit weight of foods (g) has an important effect on the regulation of energy intake and some health-related factors, including adiposity index(AI), weight reduction and weight maintenance; however its function on the regulation of resting metabolic rate (RMR) is less understood. Therefore, the aim of this study was to investigate the association of DED with AI, RMR, respiratory quotient (RQ) and anthropometric indices in overweight and obese women. A total of 301 overweight and obese women were included in this comparative, cross-sectional study. Body composition was measured using the body composition analyzer. RMR was measured by means of indirect calorimetry. Usual food intakes of subjects over the past year were evaluated through the use of a semi-quantitative food frequency questionnaire. There was a significant difference between DED and age, CO2 production, RMR, RMR per kg of weight and the RQ (P<0.05). After adjusting the data for age, lean mass and physical activity, the relationship between DED and RMR per kilogram of body weight and RQ was still meaningful (P<0.0001). There was no significant relationship between DED and AI (P=0.55). Based on the findings of this research, one unit increase in DED causes a 0.89 unit increase in the RMR per kilogram and 0.18 unit increase in RQ, whereas no relationship was observed between AI and DED.

Diabetes is considered as a major metabolic disease with high rates of mortality. This study was performed to assess the effects of low and high energy dense vs diets on anthropometric measures، glycemic index، and lipid profiles of type 2 diabetic women. In a randomized controlled parallel design clinical trial، a total of 60 diabetic women [age: 30-60 years; body mass index (BMI) > 25 kg/m2] participated. After matching for age، BMI، and menopausal status، subjects were randomly assigned to consume either a low energy dense [charbohydrate: 65% and fat: 25% of total energy]، high energy dense (charbohydrate: 55% and fat: 35%)، or normal-energy-dense diets (charbohydrate: 60% and fat: 30%) for 8 weeks. Compliance was assessed through a 3-day dietary record during the intervention. Anthropometric measures، plasma glucose and serum insulin، and lipid profiles were evaluated on fasting state at baseline and at the end of the intervention. Difference in dietary energy density did not result in different changes in weight and BMI between groups. Mean change in weight and BMI were almost -3 kg and 1-1. 5 kg/m2 for all groups. Consumption of high energy dense diet resulted in significantly lower serum triglyceride levels compared to low and normal energy dense diets (-41. 16 vs. 2. 56 and 14. 64 mg/dL، P = 0. 01). Within-group differences revealed significant effect of low energy dense diet on serum low density lipoprotein and total cholesterol levels (-13. 25 mg/dL، P = 0. 004 and -17. 68 mg/dL، P = 0. 003 respectively). No overall significant differences in fasting plasma glucose and serum insulin levels were observed between the 3 groups. Consumption of a high energy dense diet might reduce elevated serum triglyceride levels among Iranian women with type 2 diabes. However، adherence to a diet rich in fruits and vegetables might improve serum low density lipoprotein and total-cholesterol levels of these patients.