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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: It is not known if or how exercise behavior regulations (EBRs) relate to exergaming in adolescents. The study objectives were 1) to determine if EBRs differ between adolescents who do and do not exergame; and 2) among exergamers, to describe the associations between EBRs and exergame duration, intensity, and achieving physical activity (PA) guidelines. Methods: This study was a cross-sectional analysis of data collected in mailed self-report questionnaires completed by 1243 students (mean ± SDage = 16.8 ± 0.5 years; 43% boys). Results: In girls, those who exergamed scored higher than nonexergamers on introjected (mean ± SD = 1.9 ± 1.0 vs.1.6 ± 0.9; P = .001) and identified (mean ± SD = 3.1 ± .0 vs.2.9 ± 0.9; P = .049) regulation. Exergame intensity was associated with identified regulation [OR (95% CI) = 2.2 (1.0, 4.5)], minutes exergaming per week was associated with amotivation [β (95% CI) = 0.4 (-0.0, 0.8)], and achieving guidelines was associated with external [OR (95% CI) = 3.7 (1.0, 13.4)] and identified [OR (95% CI) = 5.6 (2.0, 16.0)] regulations. In boys who exergamed, intrinsic regulation was associated with exergame duration [β (95% CI) = -0.3 (-0.6, 0.0)]. Conclusions: Girls who exergame may have partially internalized exergaming as a PA behavior. Boys may prefer other types of PA such as team sports or other more traditional videogames over exergaming or they may not view exergaming as PA. [ABSTRACT FROM AUTHOR]

Objective: Physical activity levels decline from adolescence to adulthood, but participation in a variety of sports during childhood and adolescence (i.e., sampling) may increase physical activity behaviour during adulthood. We examined the association between sampling sports during adolescence and moderate-vigorous exercise behaviour in adulthood, and we assessed whether this relationship is mediated by perceived variety in exercise. Design: Study 1- prospective longitudinal; Study 2- cross-sectional. Our main outcome was exercise behaviour. Results: In study 1 (n = 775), sampling more sports during adolescence (b =.25, p <.01; 95% CI [.12,.39]) predicted increased frequency of exercise behaviour in young adulthood. In study 2 (n = 108), sampling more sports in adolescence (β =.08, p =.03; 95% CI [.03,.17]) was indirectly associated with exercise behaviour in adulthood through perceived variety in exercise. Conclusion: These findings add to the evidence that sampling sports during adolescence is positively associated with moderate-vigorous exercise during adulthood, and the experience of variety may, in part, explain this relationship. This research generates new hypotheses regarding a potential psycho-social mediator (perceived variety in exercise) of the sampling-exercise behaviour relationship. [ABSTRACT FROM AUTHOR]

There is growing interest in physical activity (PA) to prevent mental disorders in youth. However, few studies examine the association between PA and mental health. Further, how PA volume and context relate to mental health and mental disorders remains unclear, especially among youth in transition to adulthood. This study examined the cross-sectional associations among PA volume and context, mental health, and symptoms of anxiety and depression in post-secondary students. A total of 1527 post-secondary students (97.4% were age 16-24years) recruited in a CEGEP in Quebec, Canada completed a self-report questionnaire during class-time in October 2013. Multivariate linear regression was used to model the associations between PA volume and context and mental health, anxiety and depression controlling for sex, age and perceived socioeconomic status. Volume of moderate-to-vigorous leisure time PA (MVPA) was positively associated with mental health (β (95% CI)=0.072 (0.045, 0.099)) and inversely associated with symptoms of anxiety (-0.011 (-0.020, -0.001)) and depression (-0.010 (-0.017, -0.003)). Volume including all PA intensities was associated with mental health (0.052 (0.028, 0.076)). After controlling for PA volume, active youth involved in team sports had better mental health than those who engaged in PA individually. PA volume and the social context of PA are independently associated with mental health among youth. MVPA is inversely associated with anxiety and depressive symptoms. [ABSTRACT FROM AUTHOR]

Objectives: Motives for participating in a specific type of physical activity (PA) may differ across PA type in youth. We studied the relationship between PA motives and type of PA engaged in by youth.Design: Cross-sectional analysis using data from the Monitoring Activities of Teenagers to Comprehend their Habits(MATCH) study.Method: Eight hundred and two students age 10–11 years from 17 primary schools in New Brunswick, Canada completed a questionnaire that collected data on type of PA participated in (individual, group-based, organised and non-organised), PA motives (enjoyment, social affiliation, competence, fitness/health, and appearance) and attainment of PA guidelines (60 minutes of moderate-to-vigorous PA (MVPA) per day). The associations between PA motives and PA type and between PA motives and attainment of PA recommendations were assessed in multi-level logistic regression models.Results: Endorsing enjoyment motives was associated with participation in organised PA (odds ratio, 95% confidence interval (CI): 1.54, 1.24–1.91). Competence motives were associated with participation in group-based PA (1.27, 1.11–1.46) and achievement of PA recommendations (1.95, 1.37–2.78).Conclusion: Targeting enjoyment and competence motives may be associated with increased participation in organised and group-based PA as well as with an increased likelihood of meeting PA guidelines in youth. [ABSTRACT FROM AUTHOR]

Copyright of Applied Physiology, Nutrition & Metabolism is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Applied Physiology, Nutrition & Metabolism is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

OBJECTIVES: Less than 15% of children and adolescents participate regularly in physical activity (PA) and, with ever-increasing obesity, strategies to improve PA levels in youth are urgently needed. Exergaming offers a PA alternative that may be especially attractive in our increasingly technophilic society. However, there are no observational studies of exergaming in population-based samples of adolescents. The purpose of this study was to investigate potential sociodemographic, lifestyle, psychosocial, weight-related, and mental health correlates of exergaming as well as describe the type, timing, and intensity of exergaming in a population-based sample of adolescents. METHODS: Data on exergame use and potential sociodemographic, lifestyle, psychosocial, weight-related, and mental health correlates of exergaming were collected in mailed self-report questionnaires completed by 1241 grade 10 and 11 students from the Montreal area with a mean age of 16.8 years (SD = 0.05 years; 43% male) participating in the AdoQuest study. The independent correlates of exergaming were identified in multivariable logistic regression models. RESULTS: Nearly one-quarter (24%) of participants reported exergaming. Exergamers played 2 days per week on average, for ~50 minutes each bout; 73% of exergamers played at a moderate or vigorous intensity. Exergamers were more likely than nonexergamers to be girls, to play nonactive video games, to watch ≥2 hours of television per day, to be stressed about weight, and to be nonsmokers. CONCLUSIONS: Many adolescents exergame at intensity levels that could help them achieve current moderate-to-vigorous PA recommendations. Interventions that encourage exergaming may increase PA and decrease sedentary behavior in select youth subgroups, notably in girls. [ABSTRACT FROM AUTHOR]