Produção Nacional
Revisado por pares
Effectiveness Of School-based Program To Reducing Sedentary Behavior And Improving Physical Activity In Brazilian Students
2020; Lippincott Williams & Wilkins; Volume: 52; Issue: 7S Linguagem: Inglês
10.1249/01.mss.0000675644.33101.51
ISSN1530-0315
AutoresSueyla Ferreira da Silva dos Santos, Drenya Bordin, Elaine Fernanda Dornelas de Souza, Thiago Ferreira de Sousa, Ismael Forte Freitas Júnior,
Tópico(s)Youth, Drugs, and Violence
ResumoRegular high intensity physical activities have been associated with healthy outcomes in adolescents. Previous studies have reported positive changes on physical activity (PA) level and sedentary time (SED) in participants of multicomponent school-based programs. The main research question was whether School in Action program is effective on promote active life style in Brazilian adolescents. PURPOSE: To examine the effects of a multicomponent school-based program on students’ PA and SED. METHODS: A cluster randomized controlled trial with 370 adolescents (aged 11.7 years, SD=0.6) from four public schools from Presidente Prudente-SP, Brazil, were randomized to either an intervention or control group. School in Action program was based on ecological and self-determination theory principles and strategies consisted of: (a) 15 minutes of PA program in physical education (PE) class, (b) PA practice during the lunch break, (c) active breaks during theoretical classes, (d) monthly participation of school’s health education project, (e) parent’s counseling during school meeting and (f) school playground adaptation and acquisition of material resources to improve moderate-to-vigorous physical acitivity (MVPA). Changes in PA and SED were measured. PA level was evaluated by wrist-worn accelerometers (Actigraph, gt3x+), and Chandler’s cut-points were considered. Generalized linear mixed models were used and pre-specified interactions were tested (i.e., group*time). All analyses were adjusted by sex, peak height velocity, baseline data and social economic level on SPSS, 25.0 version, 95% of significance. RESULTS: Total of 70.27% (n=260) of data accelerometer was valid at baseline (600 minutes per day, minimum 3 days). The proposed intervention presents decreased SED (∆ intervention group ‘baseline to post-test’= -3.8; ∆ control group ‘baseline to post-test’= 6.3; p=0.04) and minimize the reduction of vigorous PA (∆ intervention group of ‘baseline to follow-up’= -0.2; ∆ control group ‘baseline to follow-up’= -0.4; p=0.03). Time spent in MVPA did not differ between the groups over time. CONCLUSION: The multicomponent program was effective to decrease SED and can maintain students’ vigorous PA level.
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