The study of physical activity, physical fitness, and academic performance research are reviewed from a historical perspective, by providing an overview of existing publications focused on children and adolescents. Using rigorous inclusion criteria, the studies were quantified and qualified using both meta-analytic and descriptive evaluations analyses, first by time-period and then as an overall summary, particularly focusing on secular trends and future directions. This review is timely because the body of literature is growing exponentially, resulting in the emergence of new terminology, methodologies, and identification of mediating and moderating factors. Implications and recommendations for future research are summarized.

Child sleep disorders are increasingly prevalent and understanding early predictors of sleep problems, starting in utero, may meaningfully guide future prevention efforts. Here, we investigated whether prenatal exposure to maternal psychological stress is associated with increased sleep problems in toddlers. We also examined whether fetal brain connectivity has direct or indirect influence on this putative association. Pregnant women underwent fetal resting-state functional connectivity MRI and completed questionnaires on stress, worry, and negative affect. At 3-year follow-up, 64 mothers reported on child sleep problems, and in the subset that have reached 5-year follow-up, actigraphy data (N = 25) has also been obtained. We observe that higher maternal prenatal stress is associated with increased toddler sleep concerns, with actigraphy sleep metrics, and with decreased fetal cerebellar-insular connectivity. Specific mediating effects were not identified for the fetal brain regions examined. The search for underlying mechanisms of the link between maternal prenatal stress and child sleep problems should be continued and extended to other brain areas.

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Schools are focusing more on promoting physical activity (PA) before, during, and after the school day, to combat the risk factors associated with sedentary behaviors. Since attitudes impact decisions to be physically active, identifying how PA attitudes relate to established attitudes toward physical education (PE), as well as PA intentions and behaviors are important—and thus the focus of this study. Middle school students ( N = 948; 45% female) completed PA behavior, PA intention, and PA and PE attitude surveys. Findings provided a better understanding of attitude theory with the identification of relationships between PA attitudes and PE attitudes, behavioral intention, and behavior. Multiple regression model results showed significant relationships between positive PA attitudes, negative PA attitudes, and PE attitudes with behavioral intention, and self-reported PA behavior. Differences between positive and negative PA attitudes were identified with positive PA attitudes most predicting intention. The results provide guidance for developing learning experiences aimed at promoting attitudes toward PA.