A school-based intervention improves physical fitness in Ecuadorian adolescents: a cluster-randomized controlled trial

International Journal of Behavioral Nutrition and Physical Activity

Patrick Kolsteren⁴  Greet Cardon³  Silvana Donoso¹  Rosendo Rojas¹  John Van Camp²  Diana Andrade¹  Dominique Roberfroid⁴  Lieven Huybregts²  Roosmarijn Verstraeten⁴  Angelica Ochoa-Aviles²  Carl Lachat⁴  Susana Andrade² 

[1] Food Nutrition and Health Program, Universidad de Cuenca, Avenida 12 de Abril s/n y Avenida Loja, Cuenca, EC010107, Ecuador;Department of Food Safety and Food Quality, Ghent University, Coupure links 653, Ghent, 9000, Belgium;Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, Ghent, 9000, Belgium;Institute of Tropical Medicine, Nationalestraat 155, Antwerp, 2000, Belgium

关键词: Randomized control trial;    Adolescents;    Physical activity;    Sedentary;    Fitness;   

Others  :  1146181
DOI  :  10.1186/s12966-014-0153-5

 received in 2014-02-17, accepted in 2014-11-28,  发布年份 2014

【 摘 要 】

Background

Effective lifestyle interventions are needed to prevent noncommunicable diseases in low- and middle-income countries. We analyzed the effects of a school-based health promotion intervention on physical fitness after 28 months and explored if the effect varied with important school characteristics. We also assessed effects on screen time, physical activity and BMI.

Methods and results

We performed a cluster-randomized pair matched trial in schools in urban Ecuador. The intervention included an individual and environmental component tailored to the local context and resources. Primary outcomes were physical fitness (EUROFIT battery), screen time (questionnaires) and physical activity (accelerometers). Change in BMI was a secondary outcome. A total of 1440 grade 8 and 9 adolescents (intervention: n = 700, 48.6%) and 20 schools (intervention: n = 10, 50%) participated. Data of 1083 adolescents (intervention: n = 550, 50.8%) from 20 schools were analyzed.

The intervention increased vertical jump (mean effect 2.5 cm; 95% CI 0.8-4.2; P = 0.01). Marginally insignificant, adolescents from the intervention group needed less time for speed shuttle run (intervention effect = −0.8 s, 95% CI −1.58-0.07; P = 0.05). The proportion of students achieving over 60 minutes of moderate-to-vigorous physical activity/day decreased over time with the change in proportion significantly less in the intervention schools (6 vs. 18 percentage points, P < 0.01). The intervention effect on speed shuttle run was significant in larger schools while the effect on vertical jump was larger in mixed gender school compared to small and female schools. The proportion of schools that met the recommendations for physical activity increased with 37% in intervention schools with half-day schedule compared to the controls in the pair. No significant effects were found on screen time and BMI. Measurement of physical activity in a subsample was a limitation. No adverse effects were reported.

Conclusions

A school-based intervention with an individual and environment component can improve physical fitness and can minimize the decline in physical activity levels from childhood into adolescence in urban Ecuador.

Trial registration

Clinicaltrials.gov identifier NCT01004367 webcite.

【 授权许可】

   
2014 Andrade et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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