24-hour movement behaviours and self-rated health in Chinese adolescents: a questionnaire-based survey in Eastern China.

Objective: Although much evidence has demonstrated the benefits of adhering to the 24-hour movement guidelines, little is known about their association with self-rated health in adolescents. The objective of this study was to explore the association between adherence to the 24-hour movement guidelines (i.e., physical activity, screen time, and sleep) and self-rated health among Chinese adolescents aged 10-17 ages. Methods: A convenient sample of 12 schools and their students were recruited for this cross-sectional study. Physical activity and screen time were assessed using a questionnaire based on the Health Behaviour in School-aged Children questionnaire, while sleep duration was used measured using the Pittsburgh Sleep Scale. Ordinal logistic regression was performed to examine the association between adherence to the 24-hour movement guidelines and self-rated health. Results: Adolescents who adhered to more guidelines contained in the 24-hour movement guidelines reported better self-rated health. A dose-response association was observed, with the odds ratio (OR) for adhering to all three = 11.26, 95% CI [4.82-26.35]; OR for meeting two = 1.62, 95% CI [1.25-2.12]; OR for meeting one = 1.16, 95% CI [0.98-1.38]) indicating a higher probability of better self-rated health with increasing adherence. Regarding adherence to specific combination of 24-hour movement guidelines, positive associations were found for adhering to all three recommendations (OR = 11.95, 95% CI [5.06-28.19]), only MVPA (OR = 4.96, 95% CI [2.82-8.72]), MVPA + screen time (OR = 5.50, 95% CI [3.02-9.99]), and MVPA + sleep (OR = 4.63, 95% CI [2.52-8.51]). Conclusion: This study provides evidence supporting the association between adherence to the 24-hour movement guidelines and better self-rated health among Chinese adolescents. Sufficient physical activity may be particularly important for promoting self-rated health in this population.

A Meta-analysis of self-determination theory for promoting physical exercises of children and adolescents / 中国学校卫生

Objective@#To explore the influence of self-determination theory (SDT) on adolescent physical activity promotion.@*Methods@#Six electronic databases including EBSCO host, Science Direct, Sports Discus, Springer Link, Pubmed, and Web of Science. The search period is from all databases to all relevant documents from the start date to May 18, 2019. An exhaustive collection of studies was selected to assess the relationship between motivation and physical activity in children and adolescents.@*Results@#A total of 41 studies met the inclusion criteria. The overall level of self-determination motivation had a weak to moderate promotion of physical activity level (ρ=0.21-0.31). Autonomous forms of motivation (internal motivation and identification regulation) had a moderate role in promoting physical activity(ρ=0.27-0.38), while controlled forms of motivation (ie, introversion regulation and external motivation) had weak inhibition(ρ=-0.17--0.03). Lack of motivation showed a weak inhibitory effect on physical activity(ρ=-0.21--0.11).@*Conclusion@#Self-determination motives are significatly correlated with continued health promotion behaviors. Therefore, it is an effective method to promote physical health among children and adolescents with self-determination motive as an objective in the intervention.