Environmental Influences on Food Intake and Obesity

环境对食物摄入和肥胖的影响

• 批准号: 8316300
• 负责人: BARBARA Jean ROLLS
• 金额: $ 56.4万
• 依托单位: PENNSYLVANIA STATE UNIVERSITY, THE
• 依托单位国家: 美国
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8316300
• 关键词: Adherence; Biological Markers; Blood; Body Weight; Body Weight decreased; Characteristics; Computer software; Consumption; Data; Development; Diet; Dietary intake; Dietitian; Eating; Energy Intake; Environment; Exposure to; Food; Freezing; Funding; Group Meetings; Guidelines; Hunger; Individual; Inflammation; Instruction; Intervention; Knowledge; Lead; Learning; Liquid substance; Maintenance; Measures; Methods; Nutritional; Obesity; Outcome; Overweight; Participant; Phase; Programmed Instruction; Public Health; Randomized; Randomized Controlled Trials; Reporting; Research; Research Project Grants; Satiation; Solid; Structure; Testing; Training; Translating; Vegetables; Water; Weight; Weight maintenance regimen; Woman; Yogurt; base; behavior change; disorder risk; efficacy testing; energy density; evidence base; food consumption; fruits and vegetables; health organization; improved; innovation; instrument; insulin sensitivity; intervention program; meetings; men; portion control; programs; psychosocial; randomized trial; response; skills; tool; weight maintenance

DESCRIPTION (provided by applicant): This proposal is a continuation of previously funded research on portion size, which clearly established that large portions have a powerful effect on food consumption, and showed more recently that changes in portion size can be used to reduce energy intake in the short term. It is now essential to translate these findings to the management of body weight. The primary aim of this research is to determine the efficacy of two promising portion-control strategies to achieve sustainable dietary and behavior changes and to promote weight loss and maintenance. We propose a randomized controlled trial to test two different approaches to managing portion sizes: one that gives individuals skills and tools to help them make appropriate portion choices, and another that focuses on consumption of pre-portioned foods in order to limit exposure to large portions in the personal food environment. During a 6-month intervention phase, 300 overweight and obese women and men will meet weekly with dietitians for individual instruction; this will be followed by 12 months of monthly group meetings to promote the maintenance of behavior changes and weight loss. Participants will be randomly assigned to one of three equally intensive intervention programs. The portion-size instruction group will be given training in selecting portions and in the use of portion-control tools such as measuring implements, photographs, and charts. The instruction will include an innovative approach based on previous research from this grant, which shows that consuming larger portions of foods that are low in energy density (such as vegetables and water- rich foods) enhances satiety and reduces energy intake. A second group of participants will be provided with pre-portioned foods (such as frozen entries, fruit and vegetables, and yogurt) for two meals and one snack daily during the intervention phase, in addition to receiving basic nutritional instruction for weight loss. The third group will receive only the basic nutritional program. It is hypothesized that the two portion-control interventions will result in increased weight loss during the intervention phase, but that the maintenance of weight loss will depend on sustained changes in the acquisition and application of portion size knowledge. An innovative aspect of this research is that it will not only evaluate the usual outcomes associated with weight loss, but will also use state-of-the-art methods to assess the impact of the interventions on the understanding and implementation of portion-control strategies. Thus, the second aim of the research is to determine the effects of the programs on knowledge and consumption of appropriate portions, as assessed by innovative software and multiple-pass dietary recalls. The third aim is to conduct exploratory analyses of individual factors that may influence the response to the portion-control interventions, such as psychosocial indicators, blood biomarkers, and measures of adherence to the interventions. The expected outcome of the project is that it will lead to the development of specific, evidence-based strategies to help control portion sizes in order to manage weight.

描述（由申请人提供）：该提案是先前资助的关于份量的研究的延续，该研究清楚地表明，大份量对食物消费有强大的影响，最近表明，份量的变化可用于在短期内减少能量摄入。现在必须将这些发现转化为体重管理。本研究的主要目的是确定两种有前途的部分控制策略的有效性，以实现可持续的饮食和行为改变，并促进体重减轻和维持。我们提出了一个随机对照试验，以测试两种不同的方法来管理部分大小：一个是给个人的技能和工具，以帮助他们做出适当的部分选择，另一个是专注于消费的预先分配的食物，以限制暴露于大部分的个人食品环境。在为期6个月的干预阶段，300名超重和肥胖的妇女和男子将每周与营养师会面，进行个人指导;随后12个月每月举行小组会议，以促进行为改变和减肥的维持。参与者将被随机分配到三个同等强度的干预计划之一。将对分量指导组进行选择分量和使用分量控制工具（如测量工具、照片和图表）的培训。该指令将包括一种基于该资助先前研究的创新方法，该方法表明，食用更大部分能量密度低的食物（如蔬菜和富水食物）可增强饱腹感并减少能量摄入。第二组参与者将在干预阶段每天提供两餐和一餐零食的预分配食物（如冷冻条目，水果和蔬菜以及酸奶），此外还将接受减肥的基本营养指导。第三组只接受基本的营养方案。据推测，这两个部分控制干预措施将导致在干预阶段增加体重减轻，但体重减轻的维持将取决于持续的变化，在获取和应用部分大小的知识。这项研究的一个创新方面是，它不仅将评估与减肥相关的通常结果，而且还将使用最先进的方法来评估干预措施对理解和实施部分控制策略的影响。因此，研究的第二个目的是确定该计划对知识和适当部分的消费的影响，通过创新软件和多通道饮食回忆进行评估。第三个目的是对可能影响对部分控制干预措施的反应的个体因素进行探索性分析，例如心理社会指标，血液生物标志物和对干预措施的依从性措施。该项目的预期成果是，它将导致制定具体的、基于证据的战略，以帮助控制份量，从而控制体重。