Association between patterns of sedentary time and academic performance in adolescents: the mediating role of self-concept.

Objective: To analyze the association between the pattern of sedentary time (bouts and breaks) with academic performance, with an emphasis on the mediating role of self-concept.

Methods: Participants in the cross-sectional study were 394 adolescents (208 girls), aged 10-14 years, from sixth grade from Londrina, Paraná, Brazil. The sedentary time pattern was measured through accelerometry.

Development of cardiorespiratory fitness standards for working memory using receiver operating curves in 15-year-old adolescents.

Background: Working memory performance is associated with better academic achievements in children and adolescents, and it is positively related to CRF. However, what level of cardiorespiratory fitness (CRF) discriminates higher working memory performance is not known. The purpose of this study was to identify CRF thresholds linked to working memory in adolescents.

Association Between Device-Measured Moderate-to-Vigorous Physical Activity and Academic Performance in Adolescents.

Background: Although many studies found a positive association between physical activity (PA) and academic performance (AP), most did not consider important variables of school setting and students' self-concept.

Aims: To analyze the association between moderate-to-vigorous PA (MVPA) and AP in adolescents, considering potential confounding variables of school setting and self-concept in adolescents.

Method: The final sample was composed of 394 students (186 boys) with a mean age of 11.