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（由申请人提供）：学龄前儿童被认为是实施预防肥胖策略的重要时期，学龄前儿童正处于形成阶段，在此期间，调节能量（卡路里）摄入的能力正在被饮食所取代。在对照研究中，我们发现食物份量（重量）和能量密度（每重量卡路里）的增加会促进学龄前儿童在几餐中摄入过多的能量。通过系统地改变食物和多天的饮料，以确定儿童对能量摄入的调节是否可以抵消大部分能量密集食物的影响，或者这些食物是否对能量摄入有持续的影响。我们还将根据当前的饮食指南测试一种调节能量摄入的策略。，以积极的方式利用份量来增加蔬菜和水果等低能量密度食物的比例，并减少高能量密度食物的比例。在这项提案中，我们将进行三项改变食物特性的研究。连续 5 天为儿童提供服务3 至 5 岁的儿童在学前班和家庭环境中，实验 1 将比较提供所有食品和饮料的较大份量与提供所有食品和饮料的较小份量，实验 2 将比较提供所有食品和饮料的高能量密度版本。实验 3 将比较具有典型比例的食物组的膳食与用较大部分的低能量密度蔬菜和水果替代能量密度较高的食物的膳食。三个具体目的是确定不同份量、能量密度以及 5 天内所有膳食中低能量密度食物的比例对能量摄入的影响。该研究的总体目标是评估 (a) 是否。学龄前儿童在多天内调整能量摄入量，以补偿食物份量和能量密度的变化，从而表现出自我调节能力，以及（b）这些强大的食物特性是否可以积极地用于在当前肥胖环境中管理能量摄入。诸如此类的严格控制的研究将导致以下方面的发展：有助于调节能量摄入和预防儿童肥胖的循证策略。