Background: Low prevalence of physical activity (PA) and a high prevalence of mental health problems are common among youth. The aim of this study was to evaluate the association between PA during adolescence and depression and anxiety disorders in young adulthood. Methods: Data from the 1993 Pelotas (Brazil) Birth Cohort Study were analyzed. Leisure-time PA and total PA (leisure plus commuting) were evaluated at 11, 15, and 18 years using self-reported data. PA was evaluated at each age separately and during adolescence, considering the number of times participants reached PA recommendations. Depression and anxiety were assessed through Mini International Neuropsychiatric Interview at 22 years. Crude and adjusted association analyses were performed using Poisson regression with robust error variance, providing prevalence ratios and 95% confidence intervals. Results: Three thousand two hundred and forty-seven participants were included in the study. In the adjusted analyses, active participants in leisure-time PA (≥300 min/wk) and total PA at 11 years were less likely to be depressed at age 22 (prevalence ratios: 0.54; 95% confidence interval, 0.33–0.89; prevalence ratios: 0.63; 95% confidence interval, 0.41–0.97). For leisure-time PA, the more PA recommendations were met during adolescence, the lower the prevalence of depression. There was no association when PA variables were evaluated separately at 15 and 18 years and between PA and anxiety after controlling for potential confounders. Conclusions: Early adolescence appears to be a sensitive period for PA benefits on depression in early adulthood. The more timepoints reaching PA recommendations during adolescence, the lower the risk of depression. On the other hand, PA during adolescence was not associated with anxiety in young adults.
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Physical Activity During Adolescence and Mental Health in Early Adulthood: Findings From the 1993 Pelotas Birth Cohort Study
Bruna Gonçalves Cordeiro da Silva, Ana Maria Baptista Menezes, Helen Gonçalves, Charles Phillipe de Lucena Alves, Felipe Mendes Delpino, Rafaela Costa Martins, and Fernando César Wehrmeister
Independent, Stratified, and Joint Associations of Sedentary Time and Physical Activity With Cardiovascular Disease: A Systematic Review
Charles Phillipe de Lucena Alves, Otávio Amaral de Andrade Leão, Felipe Mendes Delpino, Gregore Iven Mielke, Ulf Ekelund, Eduardo Caldas Costa, and Inácio Crochemore-Silva
Background: Recent statistics highlight cardiovascular diseases (CVD) as a major global cause of death. This review examines the methodological approaches and the main results of independent, stratified, and joint association of sedentary time (ST) and physical activity (PA) on CVD outcomes. Methods: We searched PubMed, Embase, Web of Science, and Scopus for prospective cohorts that examined the independent, stratified, or joint associations of ST and PA with CVD outcomes. Independent associations were defined as analyses mutually adjusted for PA and ST. Stratified associations were considered when there was a reference group in each stratum of PA or ST, and joint associations were defined by a single reference group for all other combined categories of ST and PA levels. Results: Of 45 articles, 69% explored independent association of ST or PA on CVD outcomes, while 31% using a stratified/joint approach. Most studies used self-reports for ST and PA and focused on CVD mortality. Mutually adjusted analyses identified ST positively and PA inversely associated to CVD outcomes. Stratified studies showed higher ST’s pronounced impact on CVD for lower PA levels. High PA mitigated but did not eliminate ST’s negative impact. Joint analyses revealed highest CVD risk in those with both high ST and low PA, and elevated risk in various intermediate combinations. Conclusions: Employing independent, stratified, and joint association approaches can yield distinct and complementary public health messages aimed at promoting cardiovascular health. Recommendations should aim to not only to encourage boosting PA levels, but also, concurrently decrease ST.
