Hannum Sandra M, Carson LeaAnn, Evans Ellen M, Canene Kirstie A, Petr E Lauren, Bui Linh, Erdman John W
Food Science and Human Nutrition (FSHN)/ Nutritional Sciences Division, University of Illinois, Urbana, Illinois 61801, USA.
Obes Res. 2004 Mar;12(3):538-46. doi: 10.1038/oby.2004.61.
To determine the efficacy of a weight-loss diet using packaged portion-controlled entrees compared with a self-selected diet based on the U.S. Department of Agriculture Food Guide Pyramid (FGP) (United States Department of Agriculture, Center for Nutrition Policy and Promotion, Washington, DC; 1996).
Sixty healthy women (BMI 26 to 40 kg/m(2); 24 to 60 years old) were randomized into two intervention groups for an 8-week parallel arm study. The portion-controlled group consumed two frozen entrees daily, plus additional food servings from the FGP. The self-selected diet group consumed a recommended number of servings from the FGP. Diets were designed to be the same in composition (55% carbohydrate, 25% protein, 20% fat) and energy level (1365 kcal). Each group met weekly to monitor compliance and take measures. Outcomes included weight, body composition by DXA, hip and waist circumference, blood pressure, fasting blood lipids, glucose, insulin, and C-reactive protein. Significant differences were assessed using repeated measures ANOVA.
The portion-controlled group (n = 26) experienced greater decreases in weight (5.6 +/- 2.2 kg or 6.5% vs. 3.6 +/- 2.5 kg or 4.2%), fat mass (3.6 +/- 1.8 vs. 2.3 +/- 1.4 kg), total cholesterol (24.4 +/- 21.5 mg/dL or 12.4% vs. 13.0 +/- 13.9 mg/dL or 6.7%), and fasting insulin (-1.8 +/- 3.7 vs.+0.3 +/- 3.8 micro U/mL) than the self-selected diet group (n = 27) (p < 0.05).
Consumption of portion-controlled entrees resulted in greater losses of weight and fat, thereby reducing cardiovascular disease risk. Accurate portion control is an important factor in weight loss success, and use of packaged entrees is an effective method of achieving this.
确定食用定量分装即食主餐的减肥饮食与基于美国农业部食物指南金字塔（FGP）（美国农业部营养政策与推广中心，华盛顿特区；1996年）的自选饮食相比的效果。
60名健康女性（体重指数26至40kg/m²；年龄24至60岁）被随机分为两个干预组，进行为期8周的平行组研究。定量分装组每天食用两份冷冻即食主餐，外加FGP推荐的其他食物份量。自选饮食组食用FGP推荐的食物份量。饮食在成分（55%碳水化合物、25%蛋白质、20%脂肪）和能量水平（1365千卡）上设计相同。每组每周会面以监测依从性并进行测量。结果包括体重、通过双能X线吸收法测量的身体成分、臀围和腰围、血压、空腹血脂、血糖、胰岛素和C反应蛋白。使用重复测量方差分析评估显著差异。
定量分装组（n = 26）在体重（5.6±2.2kg或6.5%，相比3.6±2.5kg或4.2%）、脂肪量（3.6±1.8kg相比2.3±1.4kg）、总胆固醇（24.4±21.5mg/dL或12.4%，相比13.0±13.9mg/dL或6.7%）和空腹胰岛素（-1.8±3.7相比+0.3±3.8微单位/毫升）方面的下降幅度大于自选饮食组（n = 27）（p < 0.05）。
食用定量分装即食主餐导致体重和脂肪的更大幅度减少，从而降低心血管疾病风险。准确的份量控制是减肥成功的一个重要因素，使用即食主餐包装是实现这一目标的有效方法。
