Screen-based sedentary behaviors, mental health, and social relationships among adolescents

Danilo R Silva, André O Werneck, Crisieli M Tomeleri, Rômulo A Fernandes, Enio RV Ronque, Edilson S Cyrino
2018 Motriz: Revista de Educacao Fisica  
Beyond well recognized negative effects of physical inactivity, sedentary behavior has been related to several non-communicable diseases 1 . The potential negative effects of sedentary behavior on obesity, hypertension, type 2 diabetes, and even mortality can be independent of physical activity level 2 . However, while biomedical outcomes have been more widely studied, clear evidence on the effects of sedentary behavior on mental health are still lacking 3, 4 . As highlighted in the recent
more » ... nology consensus 5 , sedentary behaviors can present several distinct characteristics with specific impacts on health. One of the main current manifestations of sedentary behavior, especially among young people, is screen use, such as TV-viewing, smartphones, computers, or passive video-games. In a relatively short time, infant screen-based media has become an enormous international industry. Data from different parts of the world show alarming screen time use among children and adolescents, from an early age 6,7 . In Brazil, approximately 60% of the school children in the 9 th grade spend more than two hours per day in front of a TV 8 . Additionally, the general screen time level has been increasing among young people and seems to track throughout lifespan 9, 10 . Previous studies suggest that high screen time increases the likelihood of depression, anxiety, and low self-esteem among young people 3, 11, 12 . It is assumed that media use can influence cognitive aspects, impacting the feelings and social environmental perceptions of young people 13 . However, there are also indications that specific types of screen time can have positive effects on social and mental outcomes 14 . Thus, in addition to understanding the impacts of different types of screen time, other knowledge gaps persist regarding the relationship between these exposures and mental health indicators, such as the gradual relation (dose-response), differences between sexes 15 , and cultural contexts 16 . In this sense, our aim was to analyze the association between screen time (TV, computer, and video-game), mental health, and social relationships in Brazilian adolescents. Methods Sample This is a cross-sectional epidemiological school-based study of Brazilian adolescents aged between 10 and 17 years old, enrolled in public schools of Londrina/PR. Londrina has 506,701 inhabitants, a average human development index of 0.778, and a gross domestic product per capita of US$ 8,530.77 17 . Sample recruitment was performed in two stages. First, all public schools in the city were separated into regions (north, south, east, west, and center) and two schools were randomly selected from each location. Subsequently, classes in the schools
doi:10.1590/s1980-6574201700si0086 fatcat:tu4upexjaneqja4e6pgpzn7ufm