Healthy Opportunities for Physical Activity and Nutrition (HOP'N) After-School Project

Study Overview
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Brief Summary
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This study presents evaluates the effectiveness of the Healthy Opportunities for Physical Activity(HOP'N) After-School Program on preventing obesity in children. The investigators hypothesized that normal and overweight/obese children attending after-school sites randomized to the control condition will increase in weight status to a greater extent compared to children at sites randomized to receive the HOP'N program. The investigators also hypothesized that after-school intervention HOP'N sites will increase in physical activity and healthful eating opportunities compared to control sites.

Detailed Description
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The dramatic increase in the prevalence of overweight among children and adolescents has led to obesity prevention becoming a major national health priority. Although schools offer a logical choice for a setting to reach a great number of youth, these disappointing findings may be due in part to the difficulties of implementing interventions in school settings where competing demands for time have made it difficult to add anything other than academics to the school day. After-school programs may provide promise for preventing child obesity because there are fewer bureaucratic obstacles and curricular inflexibilities. A three-year group-randomized controlled trial will be conducted with random assignment at the school level . The study will use a nested cross section design with a baseline year, and two subsequent intervention years.

Official Title
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Healthy Opportunities for Physical Activity and Nutrition (HOP'N) After-School Project

Conditions
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Obesity Prevention

Intervention / Treatment
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* Behavioral: HOP'N After-school Program


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: after-school program participant in fourth grade group informed parental consent assent to participate in Body Mass Index assessment Exclusion Criteria: third or fourth grade student participant in study in previous year
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: HOP'N After-School Program<br>After-school program with daily physical activity following CATCH guidelines, daily fruit/vegetable snack, and weekly nutrition and physical activity education based on social cognitive theory. | Behavioral: HOP'N After-school Program<br>* Daily 30 minutes of physical activity following CATCH guidelines, Daily healthful snack with fruit/vegetables, Weekly nutrition and physical activity education based on social cognitive theory.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Body Mass Index Z-Score |  | Fall 2005, Spring 2006, Fall 2006, Spring 2007, Fall 2007, Spring 2008 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| physical activity |  | Six times yearly | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Obesity prevention, after-school, physical activity, fruit, vegetable, children