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- Baldursdottir, Birna, et al.
(författare)
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Age-related differences in physical activity and depressive symptoms among 10-19-year-old adolescents : A population based study
- 2017
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Ingår i: Psychology of Sport And Exercise. - : Elsevier. - 1469-0292 .- 1878-5476. ; 28, s. 91-99
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: The aim of this study was to examine age- and gender-related patterns of PA and depressive symptoms among students through their adolescent years. Design: Data from three population-based surveys were analysed to determine levels of moderate- to vigorous-intensity PA (MVPA), participation in organized sports and depressive symptoms among 10-19-year-old adolescents. Method: Questionnaires assessing PA and depressive symptoms were administered to 32 860 students in compulsory and upper-secondary schools in Iceland. Results: As age increased, depressive symptoms increased and PA decreased with over half of the adolescents in upper-secondary schools not achieving recommended daily PA. There were gender differences in PA and depressive symptoms with girls being less active and reporting higher levels of depressive symptoms than boys. MVPA was associated with lower levels of depressive symptoms among both genders while organized sports had more impact on depressive symptoms among girls. Conclusions: To our knowledge, this study is the first to simultaneously examine patterns of PA and depressive symptoms among students through their adolescent years. Our findings show that the decrease in PA and increase in depressive symptoms is most pronounced around the transition from compulsory to upper-secondary school, or around the age of 15-16. Thus the findings provide important information about when to tailor public health efforts to reduce the burden of depressive symptoms among adolescents, for example by employing PA interventions. (C) 2016 Elsevier Ltd. All rights reserved.
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| 2. |
- Baldursdottir, Birna, et al.
(författare)
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Impact of a physical activity intervention on adolescents' subjective sleep quality : a pilot study
- 2017
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Ingår i: Global Health Promotion. - : Sage Publications. - 1757-9759 .- 1757-9767. ; 24:4, s. 14-22
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The aim of this pilot study was to examine the impact of a brief physical activity intervention on adolescents' subjective sleep quality. Cross-sectional studies indicate that physically active adolescents have better subjective sleep quality than those with more sedentary habits. However, less is known about the effectiveness of physical activity interventions in improving adolescents' subjective sleep quality.METHODS: In a three-week physical activity intervention, four Icelandic upper secondary schools were randomized to either an intervention group with pedometers and step diaries or a control group without pedometers and diaries. Out of 84, a total of 53 students, aged 15-16 years, provided complete data or a minimum of two days step data (out of three possible) as well as sleep quality measures at baseline and follow-up. Subjective sleep quality, the primary outcome in this study, was assessed with four individual items: sleep onset latency, nightly awakenings, general sleep quality, and sleep sufficiency. Daily steps were assessed with Yamax CW-701 pedometers.RESULTS: The intervention group (n = 26) had significantly higher average step-count (p = 0.03, partial η(2) = 0.093) compared to the control group (n = 27) at follow-up. Subjective sleep quality improved (p = 0.02, partial η(2) = 0.203) over time in the intervention group but not in the control group.CONCLUSIONS: Brief physical activity interventions based on pedometers and step diaries may be effective in improving adolescents' subjective sleep quality. This has important public health relevance as the intervention can easily be disseminated and incorporated into school curricula.
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