title: A Physical Activity Intervention for Brazilian Students From Low Human Development Index Areas: A Cluster-Randomized Controlled Trial.
abstract: Promoting physical activity (PA) in low- and middle-income countries is an important public health topic as well as a challenge for practice. This study aimed to assess the effect of a school-based intervention on different PA-related variables among students.
  
  
  
  This cluster-randomized-controlled trial included 548 students in the intervention group and 537 in the control group (11-18 years-old) from 6 schools in neighborhoods with low Human Development Index (0.170-0.491) in Fortaleza, Brazil. The intervention included strategies focused on training teachers, opportunities for PA in the school environment and health education. Variables measured at baseline and again at the 4-months follow-up included the weekly time in different types of moderate-to-vigorous PA (MVPA), preference for PA during leisure-time, PA behavioral change stage and active commuting to school. Generalized linear models and binary logistic regressions were used.
  
  
  
  An intervention effect was found by increasing the weekly time in MVPA (effect size = 0.17), popular games (effect size = 0.35), and the amount of PA per week (effect size = 0.27) among students (all P < .05).
  
  
  
  The intervention was effective in promoting improvements in some PA outcomes, but the changes were not sufficient to increase the proportion of those meeting PA recommendations.
authors.forename: Valter C Barbosa
authors.initials: VC
authors.lastname: Filho
authors.forename: Kelly Samara
authors.initials: KS
authors.lastname: da Silva
authors.forename: Jorge
authors.initials: J
authors.lastname: Mota
authors.forename: Carmem
authors.initials: C
authors.lastname: Beck
authors.forename: Adair
authors.initials: A
authors.lastname: da Silva Lopes
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D000067697:Adolescent Health; D002648:Child; D000067576:Child Health; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D011203:Poverty; D012572:School Health Services; D012574:Schools; D013334:Students; D016896:Treatment Outcome
keywords: Socioecological Theory; clinical trial; health behavior; motor activity; school health; social vulnerability