%0 Journal Article
%T Increasing physical activity and decreasing sedentary activity in adolescent girls 每 The Incorporating More Physical Activity and Calcium in Teens (IMPACT) study
%A Desiree Jones
%A Deanna M Hoelscher
%A Steven H Kelder
%A Albert Hergenroeder
%A Shreela V Sharma
%J International Journal of Behavioral Nutrition and Physical Activity
%D 2008
%I BioMed Central
%R 10.1186/1479-5868-5-42
%X Primary data analysis using a pretest-posttest control group design was conducted utilizing mixed model analysis of covariance. Data gathered from the IMPACT cohort from 2000每2002 were analyzed to determine baseline versus follow-up differences in activity endpoints. Confounders investigated included ethnicity, body mass index, menarcheal status, participation in 7th grade PE/athletics, friend/familial support and neighborhood safety.Follow-up means were higher for participating intervention schools relative to control schools for all physical activity variables but were statistically significant only for the following variables: daily minutes of vigorous physical activity (mean difference between Intervention (I) and Control (C) = 6.00∥ minutes, 95% CI = 5.82每6.18, p = 0.05), daily after school activity minutes (mean difference between I and C = 8.95∥ minutes, 95% CI = 8.69每9.21, p = 0.04), and daily weekend activity minutes (mean difference between I and C = 19.00∥ minutes, 95% CI = 18.40每19.60, p = 0.05). The intervention significantly reduced duration of student daily TV/Video watching (mean difference between I and C = 12.11∣ minutes, 95% CI = 11.74每12.48, p = 0.05) and total daily sedentary activity minutes (mean difference between I and C = 16.99∣ minutes, 95% CI = 16.49每17.50, p = 0.04).A well designed and implemented school based health and physical activity intervention can result in a positive influence upon increasing physical activity levels and decreasing sedentary activity. Future interventions should consider a more structured intervention component to obtain significant changes in WBPA.Osteoporosis is a disorder marked by micro-architectural deterioration of the bone resulting in bone fragility and an increased susceptibility to fractures [1-4]. For diagnostic purposes, the World Health Organization has defined osteoporosis as a bone mineral density value more than 2.5 standard deviations below the mean for normal young White women [4]. Based on thi
%U http://www.ijbnpa.org/content/5/1/42