Strategies to Moderate Energy Intake for the Prevention of Obesity in Children

预防儿童肥胖的适度能量摄入策略

基本信息

批准号：
8960470
负责人：
BARBARA Jean ROLLS
金额：
$ 39.14万
依托单位：
PENNSYLVANIA STATE UNIVERSITY, THE
依托单位国家：
美国
项目类别：
财政年份：
2009
资助国家：
美国
起止时间：
2009-07-15 至 2020-06-30
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): The preschool years are an important time for implementing strategies to prevent obesity. Preschool children are thought to be in a formative stage during which the ability to regulate energy (calorie) intake is being replaced by eating in response to environmental cues such as the properties of foods. In controlled studies, we have found that increases in food portion size (weight) and energy density (calories per weight) promote excess energy intake in preschool children across several meals. The proposed experiments will extend this work by systematically varying the foods and beverages served over multiple days to determine whether children's regulation of energy intake counters the effects of large portions of energy-dense foods or whether such foods have persistent effects on energy intake. We also will test a strategy for moderating energy intake based on current dietary guidance, which uses portion size in a positive way to increase the proportion of low energy-dense foods such as vegetables and fruits and to decrease the proportion of high energy-dense foods. In this proposal we will conduct three studies that vary the properties of foods served over 5 consecutive days to children 3 to 5 years of age in their preschool and home environments. Experiment 1 will compare serving larger portions of all foods and beverages to serving smaller portions of all items, and Experiment 2 will compare serving higher-energy-dense versions of all foods and beverages to serving lower-energy-dense versions. Experiment 3 will compare serving meals with typical proportions of food groups to serving meals in which larger portions of low-energy-dense vegetables and fruits are substituted for foods that are higher in energy density. Thus, the three specific aims are to determine the effects on energy intake of varying the portion size, the energy density, and the proportion of lower-energy-dense foods of all meals served over 5 days. The overall goals of the research are to evaluate (a) whether preschool children adjust their energy intake over multiple days to compensate for variations in food portion size and energy density, thus showing self-regulation, and (b) whether these powerful food properties can be used positively to manage energy intake in the current obesogenic environment. Well-controlled studies such as these will lead to the development of evidence-based strategies to help moderate energy intake and prevent childhood obesity.

描述（由适用提供）：学龄前年是实施防止肥胖的策略的重要时机。学龄前儿童被认为处于一个形成阶段，在此期间，通过响应环境线索（例如食物的特性），通过进食来调节能量的能力（卡路里）摄入量。在对照研究中，我们发现，食物部分的大小（体重）和能量密度（每重体重卡路里）的增加促进了几顿饭的学龄前儿童的能量摄入量超过能量的摄入量。拟议的实验将通过系统地改变食物和卧室多天的时间来扩展这项工作，以确定儿童对能量摄入的调节是否会违反大部分能量浓缩食品的影响，或者这些食物是否对能量摄入产生持久影响。我们还将根据当前的饮食指导测试中等能量摄入的策略，该饮食指导以积极的方式使用部分大小来增加低能浓缩食品（例如蔬菜和水果）的比例，并减少高能量密集食品的比例。在此提案中，我们将进行三项研究，以改变3至5岁的儿童在其学龄前和家庭环境中连续5天提供的食物的特性。实验1将比较提供所有食物和卧室的较大部分与提供所有物品的较小部分，并且实验2将比较提供所有食物和节拍的较高能量密度的版本与提供较低能量密度的版本。实验3将将餐食与典型的食物群和餐食进行比较，其中较大的低能量密度蔬菜和水果的食物受到较高的能量密度的食物。这三个特定的目的是确定对份量变化的能量摄入的影响，能量密度以及5天内所有餐食的低能量密度食物的比例。该研究的总体目标是评估（a）学龄前儿童是否在数天内调整能量摄入以补偿食物份量大小和能量密度的变化，从而显示自我调节，以及（b）这些强大的食物特性是否可以积极地用于管理当前肥胖环境中的能量摄入量。诸如此类的良好控制的研究将导致发展基于证据的策略，以帮助现代能量摄入和预防儿童对象。