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Sedentary behavior based on screen time: prevalence and associated sociodemographic factors in adolescentsComportamento sedentário baseado em tempo de tela: prevalência e fatores sociodemográficos associados em adolescentes

This study aimed to compare the quality of life perception among Boccia, Para-Athletics, and Wheelchair Tennis athletes. Methods: Eighty-six athletes with physical disabilities participated (Boccia = 41; Para Athletics = 14; Wheelchair Tennis = 31) in the study. The data were collected by applying the Brazilian Portuguese version of the WHOQOL-Bref questionnaire and a short survey for demographics. Descriptive and inferential statistics were used to analyze the relationship among the variables considering a confidence level of 95%. Results: Wheelchair Tennis athletes were older and Para-Athletics athletes were involved in this sport for a longer period. The majority of participants perceived positively their overall quality of life and health. Wheelchair Tennis athletes presented higher total quality of life perception scores in comparison to Boccia athletes. Regarding the specific domains of quality of life, Para-Athletics athletes presented higher scores in the psychological domain in comparison to Boccia and Wheelchair Tennis. Wheelchair Tennis presented higher social scores in comparison to Boccia and higher environment scores in comparison to Boccia and Para-Athletics. No differences were found in the physical domain in all groups. Conclusion: The evidence points to the influence of athletes' demographics, the specific nuances of their impairments, and the Paralympic Sports practiced in perceiving the quality of life. Suggestions are made to further explore the factors that may influence the quality of life perception among Paralympic Sports athletes.

A força muscular é necessária para realização de atividades diárias, sendo considerada marcador de saúde global. O objetivo deste estudo foi estimar a prevalência de baixos níveis de força de preensão manual (FPM) em adolescentes e verificar fatores (sociodemográficos, estilo de vida e status de peso) correlatos. A população de escolares da cidade de São José, SC, Brasil, era formada por 5.182 estudantes. Para o presente estudode base escolar e delineamento transversal, 923 adolescentes de 14 a 19 anos de idade foram avaliados. Analisou-se a FPM por meio de dinamometria manual e protocolo proposto pela Sociedade Canadense de Fisiologia do Exercício cujo ponto de corte para baixos níveis de força é ≤ 53,0 kgf para meninas e ≤ 83,0 kgf para meninos. As variáveis independentes analisadas foram idade, escolaridade paterna e materna, rendafamiliar, atividade física, tabagismo, hábitos alimentares e status de peso. Utilizou-se teste T de Student, U de Mann-Whitney e regressão logística binária para estimar as razões de chances e intervalos de confiança de 95%. A prevalência de baixos níveis de FPM foi de 59,7% nas meninas e 66,3% nos meninos. As meninas que não faziam ingestão de bebidas alcoólicas em excesso e eutróficas, e os meninos cujas mães estudaramaté oito anos e de renda baixa foram os subgrupos com maiores chances de baixos níveis de força de FPM. Esforços para aumentar os níveis de FPM devem ser focados nas meninas com status do peso normal e meninos cujas mães têm menor escolaridade e renda. Futuros inquéritos com delineamento longitudinal devem ser propostos para identificar preditores dos baixos níveis de força muscular em adolescentes.

Introduction: An increase in excess body fat and a decrease in the number of hours of sleep per day are health problems affecting the paediatric population.Objective: To estimate the combined prevalence of overweight and insufficient sleep/day in adolescents, and the association with sociodemographic characteristics, physical activity and sedentary behaviour. Methods:A cross-sectional school-based study was conducted with 1,132 participants from 14 to 19 years old in São José, Santa Catarina, Brazil. Body fat was assessed by body mass index (BMI) and classified by the Z-score, while adolescents reported the total hours of sleep/day. Sociodemographic data, physical activity and sedentary behaviour were collected by self-filled questionnaire. Results:The simultaneous prevalence of overweight and insufficient sleep/day was 17.5%. The factors associated with this condition were to meet the recommendations of the practice of physical activity per week, participate in gym class twice/week and period greater/equal to four hours/day in front of the screen. Conclusion:Guidelines in the school environment in relation to health problems posed by weight excess and the amount of insufficient hours sleep can be present when recommendations on physical activity and sedentary behaviour are given to students.Keywords: obesity, overweight, body mass index, epidemiology, adolescent health, motor activity, crosssectional studies Corresponding author: tiagopersonaltrainer@gmail.com Suggested citation: Lima TR, Sousa GR, Castro JAC, Silva DAS. Simultaneous presence of excess weight and insufficient hours of sleep in adolescents: prevalence and related factors. J Hum Growth Dev. 2017; 27(2): 148-157 Simultaneous presence of excess weight and insufficient hours of sleep in adolescents: prevalence and related factors J Hum Growth Dev. 2017; 27(2): 148-157