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Background: Movement behaviors (i.e., physical activity [PA], sedentary behaviors [SB], sleep) relate to mental health. Although movement behaviors are often analyzed as distinct entities, they are in fact highly inter‐dependent (e.g., if an individual increases sleep, then PA and/or SB must be reduced) and these dependencies should be accounted for in the analysis. We tested whether perceptions of time spent in movement behaviors (i.e., moderate‐to‐vigorous intensity PA [MVPA], light physical activity [LPA], SB, and sleep) related to depressive symptoms and self‐report mental health in young adults using a compositional analysis. We then estimated change in depressive symptoms with reallocation of time across movement behaviors using compositional time‐reallocation models. Methods: Data were drawn from the longitudinal NDIT dataset. Complete data were available for 770 young adults (Mage = 20.3, 55% females). Results: The proportion of time spent in MVPA relative to other movement behaviors related to depressive symptoms non‐significantly and to mental health significantly. Reallocating 15 min from MVPA to SB resulted in a significant (0.46 unit) increase in depressive symptoms, and reallocating 15 min of MVPA to LPA was associated with a (0.57) increase in depressive symptoms. Conclusion: These results indicate the importance of relative time spent in each movement behavior to mental health. Further research should examine these associations over time. [ABSTRACT FROM AUTHOR]

Background Binge drinking occurs frequently among young adults, posing risks to health and safety. Little is known, however, about which drinkers continue to binge later into adulthood. We sought to identify predictors of sustained binge drinking behaviors in young adulthood. Methods Participants from the Nicotine Dependence in Teens ( NDIT) cohort ( n = 609, 53% female) completed self-report questionnaires in 20 survey cycles ( SCs) during secondary school between 1999 and 2005, and in 2 postsecondary school SCs in 2007 to 2008 ( SC 21; Mage = 20 years) and 2011 to 2012 ( SC 22; Mage = 24 years). Participants reporting past-year binge drinking in both SCs 21 and 22 were categorized as sustainers ( n = 517). Using multivariable logistic regression, we investigated 25 potential predictors of sustained binge drinking, binge-drinking frequency, and change in frequency over time among sustainers. Results Compared with stoppers, sustainers (85% of participants) were more likely to be younger, male, and to have no college/university education. Sustainers began drinking alcohol and binge drinking earlier, drank at least monthly during more secondary school grades, binged more frequently at age 20, and scored higher on impulsivity and novelty seeking in adolescence. Among sustainers, frequent binge drinkers were more likely to be male, to be nonstudents, to score higher on novelty seeking, and to have reported more depressive symptoms in adolescence. Sustainers who decelerated their binge frequency between SCs 21 and 22 were more likely to be female, to have achieved a higher level of education, and to report more depressive symptoms in SC 21. Conclusions The determinants of sustained binge drinking are similar to predictors of binge drinking reported in the literature. Early identification of, and intervention with, youth who are impulsive, inclined toward novelty seeking, and who report higher levels of early sub clinical depressive symptoms might forestall their involvement in risky alcohol use. [ABSTRACT FROM AUTHOR]