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.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Project (R01)
Project #
5R01DK063391-02
Application #
6666689
Study Section
Special Emphasis Panel (ZDK1-GRB-6 (O1))
Program Officer
Kuczmarski, Robert J
Project Start
2002-09-30
Project End
2007-05-31
Budget Start
2003-08-01
Budget End
2004-05-31
Support Year
2
Fiscal Year
2003
Total Cost
$715,587
Indirect Cost
Name
Medical College of Georgia (MCG)
Department
Pediatrics
Type
Schools of Medicine
DUNS #
966668691
City
Augusta
State
GA
Country
United States
Zip Code
30912
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Yin, Zenong; Moore, Justin B; Johnson, Maribeth H et al. (2012) Micro- and macro-level correlates of adiposity in children. J Public Health Manag Pract 18:445-52
(2009) Measuring Enjoyment of Physical Activity in Children: Validation of the Physical Activity Enjoyment Scale. J Appl Sport Psychol 21:S116-S129
Wang, Li Yan; Gutin, Bernard; Barbeau, Paule et al. (2008) Cost-effectiveness of a school-based obesity prevention program. J Sch Health 78:619-24
Moore, Justin B; Hanes Jr, John C; Barbeau, Paule et al. (2007) Validation of the Physical Activity Questionnaire for Older Children in children of different races. Pediatr Exerc Sci 19:6-19
Yin, Z; Moore, J B; Johnson, M H et al. (2005) The Medical College of Georgia Fitkid project: the relations between program attendance and changes in outcomes in year 1. Int J Obes (Lond) 29 Suppl 2:S40-5
Yin, Zenong; Gutin, Bernard; Johnson, Maribeth H et al. (2005) An environmental approach to obesity prevention in children: Medical College of Georgia FitKid Project year 1 results. Obes Res 13:2153-61