Ptomey L T, Willis E A, Goetz J R, Lee J, Szabo-Reed A N, Sullivan D K, Donnelly J E
Division of Internal Medicine, Cardiovascular Research Institute, The University of Kansas Medical Center, Kansas City, KS, USA.
Department of Dietetics and Nutrition, The University of Kansas Medical Center, Kansas City, KS, USA.
J Hum Nutr Diet. 2016 Apr;29(2):209-16. doi: 10.1111/jhn.12296. Epub 2015 Feb 9.
Behavioural weight-loss interventions utilising portion-controlled meals (PCMs) produce significant decreases in weight. However, their impact on diet quality during weight maintenance is unknown. The present study aimed to assess the influence of a weight management intervention employing PCMs and increased physical activity on diet quality during weight loss and weight maintenance.
One hundred and ninety-seven overweight and obese adults [67% women; mean (SD) BMI = 34.0 (4.6) kg m(-2); age = 46.1 (8.9) years] completed an 18-month trial. The weight-loss phase (0-6 months) consisted of energy restriction, which was achieved using PCMs plus fruits and vegetables and increased physical activity. During weight maintenance (6-18 months), participants consumed a diet designed to maintain weight loss. Body weight and dietary intake were assessed at baseline, and at 6, 12 and 18 months. The Healthy Eating Index-2010 (HEI) was calculated using data obtained from 3-day food records.
Mean (SD) body weight was 14.3% (6.6%) and 8.7% (8.0%) below baseline at 6 and 18 months, respectively. The mean (SD) HEI-2010 score after weight loss [66.6 (9.4)] was significantly higher than baseline [46.4 (8.9)] and remained significantly higher than baseline at 18 months [57.7 (10.6)] (both P < 0.001).
A weight management intervention using PCMs resulted in both clinically significant weight loss and increased diet quality scores, demonstrating that the use of PCMs during weight loss allows for meaningful changes in diet quality during weight maintenance.
采用定量配餐的行为减肥干预措施可显著降低体重。然而，其对体重维持期间饮食质量的影响尚不清楚。本研究旨在评估一项采用定量配餐并增加体力活动的体重管理干预措施对减肥和体重维持期间饮食质量的影响。
197名超重和肥胖成年人[67%为女性；平均（标准差）体重指数=34.0（4.6）kg/m²；年龄=46.1（8.9）岁]完成了一项为期18个月的试验。减肥阶段（0 - 6个月）包括能量限制，通过定量配餐加水果和蔬菜以及增加体力活动来实现。在体重维持阶段（6 - 18个月），参与者食用旨在维持体重减轻的饮食。在基线以及第6、12和18个月时评估体重和饮食摄入量。使用从3天食物记录中获得的数据计算2010年健康饮食指数（HEI）。
在第6个月和第18个月时，平均（标准差）体重分别比基线低14.3%（6.6%）和8.7%（8.0%）。减肥后平均（标准差）的2010年HEI得分[66.6（9.4）]显著高于基线[46.4（8.9）]，并且在18个月时仍显著高于基线[57.7（10.6）]（两者P<0.001）。
采用定量配餐的体重管理干预措施既带来了临床上显著的体重减轻，又提高了饮食质量得分，表明在减肥期间使用定量配餐能够在体重维持期间实现饮食质量的有意义改变。
