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The authors' aim in this cross-sectional study was to characterize levels of objectively measured physical activity and sedentary time in adolescents from 9 European countries. The study comprised 2,200 European adolescents (1,184 girls) participating in the HELENA cross-sectional study (2006-2008). Physical activity was measured by accelerometry and was(More)
INTRODUCTION AND OBJECTIVES To investigate the association between objective measures of sedentary behavior and cardiovascular risk factors (CRFs) in adolescents. A secondary aim was to evaluate the degree of association between overall and abdominal adiposity and CRFs. METHODS This cross-sectional study involved 210 adolescents aged 13-17 years.(More)
BACKGROUND The aim of this article is to examine the association between adolescents' physical activity (PA) levels and their relatives' (father, mother, brothers, sisters and best friend) PA engagement and encouragement. METHODS Adolescents (52.3% girls) aged 12.5-17.5 years were gathered from the HELENA study. Adolescents' PA levels were assessed by the(More)
BACKGROUND Prior studies addressing the impacts of regular physical activity or sedentary habits on the immune system have been conducted in adults and laboratory settings. Thus, it is practically unknown how a healthy active lifestyle could affect low-grade inflammation processes, infections or allergies in young persons. The AFINOS Study was designed to(More)
OBJECTIVES The purpose of this study was to determine the sex-specific physical activity (PA) intensity thresholds that best discriminate between unhealthy/healthy cardiorespiratory fitness (CRF). METHODS Participants included 1,808 adolescents (964 girls), aged 12.5-17.5 years, from the HELENA study. We measured PA by accelerometer and calculated the(More)
INTRODUCTION New paradigms based on the multifactorial etiology of chronic diseases and behavioral outcomes suggest that a combination of health behaviors may have more impact on the outcome of interest than any single factor. OBJECTIVE To examine the independent and combined influence of four health behaviors on school performance in Spanish adolescents.(More)
OBJECTIVE To examine the independent and combined associations of the components of physical fitness with academic performance among youths. STUDY DESIGN This cross-sectional study included a total of 2038 youths (989 girls) aged 6-18 years. Cardiorespiratory capacity was measured using the 20-m shuttle run test. Motor ability was assessed with the 4×10-m(More)
BACKGROUND Data on the combined effect of lifestyles on mortality in older people have generally been collected from highly selected populations and have been limited to traditional health behaviors. In this study, we examined the combined impact of three traditional (smoking, physical activity and diet) and three non-traditional health behaviors (sleep(More)
BACKGROUND Excessive television (TV) viewing might play an important role in the development of cardiovascular disease (CVD). The aim of this study was to examine the independent associations between TV viewing and CVD risk factors in adolescents. METHODS A sample of 425 adolescents, aged 13- to 18.5-year-old, was included in this study. Body mass index(More)