The Association Between Physical Activity And Health Risk Behaviors in Brazilian Adolescents

Abstract

Adolescence is a critical period where major physical and psychologic changes occur. It is also a period where several lifelong health related behaviors are adopted and established. Behaviors such as unhealthy eating, tobacco use, alcohol use, and physical inactivity are related to major causes of morbidity and mortality among young and adults. Physical activity (PA) is an important behavior during adolescence not only because it is associated with general health, but also because it may be associated with other health-related risk behaviors. PURPOSE: To examine the association of physical activity with health risk behaviors in adolescents from Curitiba- Brazil. METHODS: A cross-section study was carried out with a representative sample of 928 (mean age 14.06 ± 1.91 years old, 467 girls) adolescents enrolled in 14 randomly selected public schools from Curitiba, Brazil. The Brazilian version of the Youth Activity Profile survey evaluated PA levels and the YRBS survey evaluated fruit, vegetable, alcohol, and tobacco consumption in the past 30 days. The Adolescent Sedentary Questionnaire evaluated total screen time. Binary Logistic regression measured the association between PA levels and risk behaviors after controlling for gender, age, BMI status, income status, and parent educational level. RESULTS: PA was inversely associated with low fruit consumption (OR = .50, 95% IC = .38 - .66, p <.001), low vegetable consumption (OR =.55, 95% IC = .42 - .73, p < .001), and high screen Time (≥3 hours/day) (OR = .79, 95% IC = .65 - .96, p < .001). Additionally, PA was positively associated with the consumption of at least one dose of alcohol in the past 30 days (OR = 1.47, 95% IC = 1.15 – 1.88, p < .001), and with the excessive consumption of alcohol (OR = 1.73, 95% IC = 1.29 – 2.33, p <.001). PA was not associated with Tobacco consumption (OR = 1.01, 95% IC = .67 – 1.52, p = .96). CONCLUSION: The results indicated that adolescents with higher PA levels consumed more fruits and vegetables and spent less time in front of electronic screens. However, adolescents with higher levels of PA were also more likely to report alcohol consumption in the past 30 days. The social characteristics of alcohol consumption may explain its positive relationship to PA. Supported by CNPq, Brazil.