The aim of this study was to investigate the impact of sex and puberty stage on circadian changes in sodium excretion, sodium-regulating hormones, and hemodynamics. Thirty-nine healthy volunteers (9 prepuberty boys, 10 prepuberty girls, 10 puberty boys, and 10 puberty girls) were included. They all underwent a 24-h circadian in-patient study under standardized conditions regarding activity, die...

OBJECTIVES To assess the prospective associations between mother-adolescent and father-adolescent relationship quality and early sexual intercourse initiation (ie, ≤16 years) among a large sample of Dutch adolescents. METHODS Two waves of data from the Rotterdam Youth Monitor, a longitudinal study in the Netherlands, were used. The analysis sample consisted of 2931 adolescents aged 12 to 16 y...

The purpose of this study was to investigate muscle activation patterns during a landing task in boys and girls through the use of muscle synergies. Electromyographical data from six lower extremity muscles were collected from 11 boys and 16 girls while they performed single-leg drop-landings. Electromyographical data from six leg muscles were rectified, smoothed, and normalized to maximum dyna...

OBJECTIVE To assess the impact of an active school model on children's physical activity (PA). DESIGN 16-month cluster randomised controlled trial. SETTING 10 elementary schools in Greater Vancouver, BC. PARTICIPANTS 515 children aged 9-11 years. INTERVENTION Action Schools! BC (AS! BC) is an active school model that provided schools with training and resources to increase children's PA...

Stice's dual pathway model of dietary restraint and negative affect was examined in both adolescent girls and boys. Self-report measures assessing body dissatisfaction, dietary restraint, negative affect and bulimic behavior were administered to 267 girls and 199 boys aged between 12 and 16 years. The findings for the girls were consistent with Stice's model, in that they indicated that both di...

The recognition of adolescents' physical activity has become one of the serious challenges of the modern times, as a concern about the future health of societies. The major goal of the presented study was to discover the level of physical activity among Polish adolescents aged 16-18, and the factors which condition this level. The investigations were carried out in 2011, among 2,974 school adol...

This study examined the role of ADHD in the association between physical aggression and two types of executive functions. Boys received a cognitive-neuropsychological test battery over the ages of 13, 14, and 15 years. Diagnostic Interview Schedule for Children (DISC 2.25) data were collected from the boys and one parent between ages 14 and 16, and an IQ estimate was obtained at age 15. Three g...

Depressive symptoms in adolescents are an increasing public health issue in Sweden and in most Western countries. Aim: To explore how individual, psychosocial, and structural determinants are associated with depressive symptoms in Swedish adolescents. Methods: A webbased questionnaire was answered by 1193 13to 16-year-old boys (n = 566) and girls (n = 627). Stepwise logistic regressions were em...

BACKGROUND Sex hormone-binding globulin (SHBG) has been proposed as a biomarker of MetS in children and adults. We aim to determine the associations of SHBG with components of MetS in children from the Middle-East where the prevalence of MetS are on the rise. METHODS In this cross-sectional study, a total of 509 randomly selected school children (226 boys and 283 girls) aged 12-16 years were ...

Chewing movements of normal 5-, 6-, 7-, and 8-year-old children were measured and compared across age, food textures, and gender. Applesauce, graham cracker, and raisins were used. Measures were taken on 98 children: eighteen 5-year-olds (9 boys, 9 girls); thirty-five 6-year-olds (16 boys, 19 girls); twenty-six 7-year-olds (13 boys, 13 girls); and nineteen 8-year-olds (10 boys, 9 girls). Compar...