RESUMO

This study examined the independent and combined associations of physical activity (PA) and sedentary behavior (SB) with health risk behaviors in Brazilian adolescents. Participants were 893 adolescents (454 girls) from Curitiba, Brazil. The Youth Activity Profile questionnaire evaluated PA and the Adolescent Sedentary Questionnaire evaluated SB. The Youth Risk Behavior Surveillance System ( YRBS) questionnaire evaluated fruit, vegetable, alcohol, and tobacco consumption. Binary Logistic regression measured the independent and combined associations of PA and SB with risk behaviors. PA was inversely associated with low fruit (OR = 0.30; 95%CI: 0.18-0.51) and vegetable consumption (OR = 0.43; 95%CI: 0.25-0.73), and tobacco use (OR = 0.52; 95%CI: 0.29-0.89). However, PA was positively associated with mild (OR = 1.54; 95%CI: 1.08-2.19) and excessive alcohol use (OR = 1.53; 95%CI: 1.01-2.33). Higher levels of PA were associated with reduced risks of smoking and healthier eating patterns, but higher likelihood of alcohol consumption

Este estudo examinou as associações independentes e combinadas de atividade física (AF) e do comportamento sedentário (CS) com comportamentos de risco à saúde em adolescentes brasileiros. Participaram do estudo 893 adolescentes (454 meninas) de Curitiba, Brasil. O questionário Youth Activity Profile avaliou a AF e o Questionário de atividades sedentárias dos adolescentes avaliou o CS. O questionário Youth Risk Behavior Surveillance System (YRBS) avaliou o consumo de frutas, vegetais, álcool e tabaco. A regressão logística binária avaliou as associações independentes e combinadas de AF e CS com comportamentos de risco. AF foi inversamente associado com baixo consumo de frutas (OR = 0,30; IC95%: 0,18-0,51), de vegetais (OR = 0,43; IC95%: 0,25-0,73) e uso de tabaco (OR = 0,52; IC95%: 0,29-0,89). No entanto, a AF foi positivamente associada com uso moderado (OR = 1,54; IC95%: 1,08-2,19) e uso excessivo de álcool (OR = 1,53; IC95%: 1,01-2,33). Níveis mais altos de AF foram associados com riscos reduzidos de fumar e padrões alimentares mais saudáveis e com maior probabilidade de consumo de álcool

Assuntos

RESUMO

OBJECTIVE: To assess age- and sex-specific patterns of 6 health-related fitness components in youth, baseline data from the NFL PLAY 60 FITNESSGRAM Partnership Project were analyzed. STUDY DESIGN: A total of 192,848 students from 1st through 12th grade in 725 schools completed the standard FITNESSGRAM testing in 2010-2014, including assessments of aerobic capacity (AC), body mass index (BMI), upper body strength and endurance, trunk extensor strength and flexibility, abdominal strength and endurance, and flexibility. Individual data were aggregated by grade and sex. Age- and sex-specific health-related criterion-referenced standards were used to classify fitness results into the healthy fitness zone (HFZ), needs improvement zone, or needs improvement health risk. RESULTS: The proportion of youth meeting the HFZ for AC varied considerably by grade for both boys (62.1%-37.6%) and girls (49.1%-26.1%) among 1st-12th grade. There was less variability by age and sex for achievement of the BMI HFZ (ranged from 52.7%-65.0%). The prevalence of achievement was similar for the remaining fitness components. Significantly lower achievement was found in the middle school years for BMI HFZ in both sexes and for AC HFZ achievement in boys. Continuous age-related lower HFZ achievement was evident in girls for AC. CONCLUSIONS: The results provide updated health-related fitness profiles for US youth and identify the critical ages when youth fitness levels start to decline.

Assuntos

RESUMO

OBJECTIVES: To examine the combined influence of physical activity and screen time (television and video games) on the odds of being overweight and to evaluate the utility of current public policy recommendations. STUDY DESIGN: Physical activity was assessed by a pedometer and screen time was assessed by survey in a sample of 709 children age 7 to 12 years. The percentage of subjects meeting current physical activity and screen time recommendations was calculated. Cross-tabulated physical activity-screen time groups were formed depending on whether or not the children were meeting current recommendations. Logistic regression was used to examine the influence of physical activity and screen time on the odds of being overweight. RESULTS: Children meeting physical activity and screen time recommendations were the least likely to be overweight. Approximately 10% of the boys and 20% of the girls meeting both recommendations were overweight, compared with 35% to 40% of those who did not meet either recommendation. Screen time and physical activity appeared to be equivalent risk factors for boys, even though physical activity in girls was more strongly associated with body mass index. CONCLUSIONS: Children not meeting the physical activity or screen time recommendations were 3 to 4 times more likely to be overweight than those complying with both recommendations.

Assuntos