A School-Based Osteoporosis Prevention Program for Adolescent Girls

Study Overview
=================
Brief Summary
-----------------
The Incorporating More Physical Activity and Calcium in Teens (IMPACT) study was a behaviorally-based middle school nutrition and physical activity program for the prevention of osteoporosis. The goal of IMPACT was to increase calcium intake and physical activity to help build bone mass in girls.

Detailed Description
-----------------
Peak bone mass is achieved during the first twenty years of life, and dietary and activity patterns that contribute to the formation of peak bone mass are developed during childhood. The IMPACT intervention was designed to increase bone density and ultimately prevent osteoporosis during adulthood. IMPACT included physical education, food service, and classroom environmental and behavioral components and was delivered by physical education (PE) specialists, food service personnel, and classroom teachers. A group of 718 sixth grade girls (mean age 11.1) from twelve middle schools in central Texas participated in the study. The group was 72% non-Hispanic white, 12% Hispanic, 5% African American, and 11% other ethnicity. After baseline measurements were completed in the fall of 2000, the twelve middle schools were pair-matched based on school characteristics (ethnicity, % economically disadvantaged, % girls in athletics) to a control (usual health education program) or the IMPACT program. The intervention was implemented for 18 months and consisted of three major components: a PE component, which emphasized daily weight-bearing activities (WBA); a health lessons component consisting of sixteen behaviorally-based lessons which emphasized WBA, calcium-rich foods, and osteoporosis prevention; and a food service component. Outcome measures included physical properties of the students' heel bones, calcium consumption, physical activity, and psychosocial factors believed to be precursors to these behaviors. Changes at the school environmental level, such as the number of calcium rich foods offered in the cafeteria and the number of opportunities offered for weight-bearing and aerobic activity, were also assessed.

Official Title
-----------------
Incorporating More Physical Activity and Calcium in Teens (IMPACT): A School-Based Osteoporosis Prevention Program for Adolescent Girls

Conditions
-----------------
Osteoporosis

Intervention / Treatment
-----------------
* Behavioral: Incorporating More Physical Activity and Calcium in Teens (IMPACT) Program


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Girls enrolled in 6th grade of selected schools Student assent Parental consent No fractures or medications that compromise bone health or strength Enrolled in 2 semesters of physical education

Ages Eligible for Study
-----------------
Minimum Age: 10 Years
Maximum Age: 13 Years

Sexes Eligible for Study
-----------------
Female

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

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


Arms and Interventions

| Intervention/Treatment |
| --- |
|Behavioral: Incorporating More Physical Activity and Calcium in Teens (IMPACT) Program|nan|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Weight-bearing physical activity, Calcium intake, School-based health education, Adolescent girls, Child nutrition, Diet