Medical College of Georgia FitKid Project

佐治亚医学院 FitKid 项目

• 批准号: 6575546
• 负责人: Bernard Gutin
• 金额: $ 61.77万
• 依托单位: AUGUSTA UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-30 至 2007-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6575546
• 关键词: behavioral /social science research tag; bioenergetics; blood pressure; body composition; cardiovascular disorder prevention; cholesterol; clinical research; diet therapy; elementary school; epidemiology; exercise; health behavior; health education; high density lipoproteins; human subject; human therapy evaluation; longitudinal human study; middle childhood (6-11); nutrition education; obesity; patient oriented research; photon absorptiometry; questionnaires

DESCRIPTION (provided by applicant): Long-term objective: To reduce the epidemic of child obesity and related disorders, which is partly due to youths being exposed to "obesogenic" environments that favor sedentary activities (TV watching, video games) and energy-dense snacks, while discouraging moderate-vigorous physical activity (MVPA). Specific aims: To test the hypotheses that (1) youths attending schools that provide a "fitogenic" after-school environment that encourages MVPA and healthy snacks will increase less in percent body fat (%BF) over a 3-yr period than youths who do not attend such schools; and (2) the fitogenic environment will lead to favorable changes in cardiovascular (CV) fitness, CV disease risk profile and psychosocial characteristics. Formative research: Two schools will be randomly assigned to control and experimental conditions for a pilot study to guide refinement of techniques to be used in the main trial; the pilot intervention will last for 3-mo. Design of main trial: 18 schools in Richmond County, Georgia, which is ca. 63% African-American, will be randomly assigned to control or experimental treatments; school (rather than individual) will be the unit of randomization and analysis. Measurements taken at the beginning and end of each of three grades (3rd-5th) will include: %BF with dual-energy x-ray absorptiometry; CV fitness with a modified Harvard Step Test; blood pressure, the total cholesterol to high density lipoprotein cholesterol ratio; anthropometry (height, weight, waist circumference); psychosocial variables related to sport and PA; and free-living PA and diet. All schools will receive information about healthy eating and PA. All 3rd graders in the control schools will be invited to participate in the testing alone, while all 3rd graders in the experimental schools will be invited to participate in both the testing and the after-school sessions, which will last 120 min each school-day afternoon. For 40 min, healthy snacks and homework assistance will be provided. The 80 min of MVPA will emphasize developmentally appropriate games and dance forms, offered in a climate conducive to development of sport competence, enjoyment and skills. The hypotheses will be tested with treatments x time analyses of variance to see if the changes in %BF and associated variables over the 3-yr period are more favorable in the experimental than in the control group. Potential public health value: If the data support the effectiveness of the intervention, then communities may be encouraged to foster fitogenic after-school environments to prevent obesity and associated health problems.

描述（由申请人提供）： 长期目标：减少儿童肥胖症和相关疾病的流行，部分原因是青少年暴露于有利于久坐活动（看电视，视频游戏）和高能量零食的“致肥胖”环境，同时不鼓励中等强度的体力活动（MVPA）。具体目标：检验以下假设：（1）与未参加此类学校的青少年相比，参加提供鼓励MVPA和健康零食的“适宜”课后环境的学校的青少年在3年内的体脂百分比（%BF）增加较少;（2）适宜的环境将导致心血管（CV）健康、CV疾病风险特征和心理社会特征的有利变化。形成性研究：两所学校将被随机分配到控制和实验条件下进行试点研究，以指导在主要试验中使用的技术的改进;试点干预将持续3个月。主要试验设计：格鲁吉亚州里士满县的18所学校，63%的非裔美国人将被随机分配到对照组或实验组;学校（而不是个人）将是随机化和分析的单位。在三个年级（3 - 5年级）的开始和结束时进行的测量将包括：采用双能X射线吸收测定法进行的BF %;采用改良哈佛台阶试验进行的CV健康;血压、总胆固醇与高密度脂蛋白胆固醇的比值;人体测量（身高、体重、腰围）;与运动和PA相关的心理社会变量;以及自由生活的PA和饮食。所有学校都将收到有关健康饮食和PA的信息。控制学校的所有三年级学生将被邀请单独参加测试，而实验学校的所有三年级学生将被邀请参加测试和课后辅导，课后辅导将持续120分钟。在40分钟内，将提供健康零食和家庭作业帮助。80分钟的MVPA将强调适合发展的游戏和舞蹈形式，在有利于发展运动能力，享受和技能的气氛中提供。将采用治疗x时间方差分析对假设进行检验，以观察3年期间%BF和相关变量的变化在实验组中是否比对照组更有利。潜在的公共卫生价值：如果数据支持干预措施的有效性，那么可以鼓励社区培养适宜的课后环境，以防止肥胖和相关的健康问题。