This trial is active, not recruiting.

Condition obesity prevention
Treatment hop'n after-school program
Phase phase 4
Sponsor Kansas State University
Collaborator Iowa State University
Start date August 2005
End date May 2008
Trial size 273 participants
Trial identifier NCT01015599, USDA no. 2005-35215-15418


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.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification efficacy study
Intervention model parallel assignment
Masking open label
Primary purpose prevention
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.
hop'n after-school program
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.

Primary Outcomes

Body Mass Index Z-Score
time frame: Fall 2005, Spring 2006, Fall 2006, Spring 2007, Fall 2007, Spring 2008

Secondary Outcomes

physical activity
time frame: Six times yearly

Eligibility Criteria

Male or female participants of any age.

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

Additional Information

Official title Healthy Opportunities for Physical Activity and Nutrition (HOP'N) After-School Project
Principal investigator David A Dzewaltowski, Ph.D.
Description 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.
Trial information was received from ClinicalTrials.gov and was last updated in April 2010.
Information provided to ClinicalTrials.gov by Kansas State University.