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份量研究的延续，该研究明确表明，大份量对食物消耗有强大的影响，并且最近表明份量的变化可用于减少能量摄入短期内。现在有必要将这些发现转化为体重管理。这项研究的主要目的是确定两种有前景的份量控制策略的功效，以实现可持续的饮食和行为改变，并促进减肥和维持体重。我们提出了一项随机对照试验来测试两种不同的管理份量的方法：一种为个人提供技能和工具来帮助他们做出适当的份量选择，另一种则侧重于预先分配食物的消费，以限制接触大份量的食物在个人饮食环境中。在为期 6 个月的干预阶段，300 名超重和肥胖的女性和男性将每周与营养师会面，接受个别指导；随后将举行为期 12 个月的每月小组会议，以促进维持行为改变和减肥。参与者将被随机分配到三个同等强度的干预计划之一。份量指导小组将接受有关选择份量和使用份量控制工具（例如测量工具、照片和图表）的培训。该指导将包括一种基于本次资助的先前研究的创新方法，该方法表明，食用大量能量密度低的食物（例如蔬菜和富含水分的食物）可以增强饱腹感并减少能量摄入。在干预阶段，除了接受基本的减肥营养指导外，还将为第二组参与者提供预先分配的食物（例如冷冻食品、水果和蔬菜以及酸奶），每天两餐和一份零食。第三组将仅接受基本营养计划。假设两种份量控制干预措施将导致干预阶段体重减轻增加，但体重减轻的维持将取决于份量知识的获取和应用的持续变化。这项研究的创新之处在于，它不仅会评估与减肥相关的通常结果，还将使用最先进的方法来评估干预措施对理解和实施份量控制策略的影响。因此，该研究的第二个目的是确定该计划对知识和适当部分消费的影响，通过创新软件和多次饮食回忆进行评估。第三个目标是对可能影响部分控制干预措施反应的个体因素进行探索性分析，例如社会心理指标、血液生物标志物和干预措施依从性测量。该项目的预期成果是，它将导致制定具体的、基于证据的策略，以帮助控制份量，从而控制体重。