Does modality matter? A latent profile and transition analysis of sedentary behaviours among school-aged youth: The UP&DOWN study

ABSTRACT

The aims of this study were to identify profiles of sedentary behaviour (SB) patterns, based on leisure-time self-reported SB modalities (screen, educative, social, and relaxing) and to evaluate changes in these profiles over 2 years among Spanish youth aged 8–18 years. Latent profile analysis (LPA), a data-driven analytic approach, was used to identify groups of boys and girls (n = 1553; 48% girls; mean±SD age: 12.56 ± 2.49 y) with distinct SB profiles using the SB modalities (time/d) as input variables. Latent transition analysis, an extension of LPA that uses longitudinal data, was used to analyse 2-year changes in these profiles. At baseline, four and three SB profiles were found among boys (labelled: screen, educative, social, and relaxing) and girls (labelled: screen/social, educative, and relaxing), respectively. Overall, more girls (range: 48%-67%) had the same profile over time, than boys (40%-52%). Participants with a screen or relaxing SB profile at baseline were more likely to have an educative profile after 2 years. Youth with a social and an educative SB profile at baseline were more likely to transition to profiles characterized by higher screen and social SB, respectively. Using a novel and person-centered approach, this study identified gender-specific SB profiles that were moderately stable over time.     

Digital Module 16: Longitudinal Data Analysis

In this digital ITEMS module, Dr. Jeffrey Harring and Ms. Tessa Johnson introduce the linear mixed effects (LME) model as a flexible general framework for simultaneously modeling continuous repeated measures data with a scientifically defensible function that adequately summarizes both individual change as well as the average response. The module begins with a nontechnical overview of longitudinal data analyses drawing distinctions with cross-sectional analyses in terms of research questions to be addressed. Nuances of longitudinal designs, timing of measurements, and the real possibility of missing data are then discussed. The three interconnected components of the LME model—(1) a model for individual and mean response profiles, (2) a model to characterize the covariation among the time-specific residuals, and (3) a set of models that summarize the extent that individual coefficients vary—are discussed in the context of the set of activities comprising an analysis. Finally, they demonstrate how to estimate the linear mixed effects model within an open-source environment (R). The digital module contains sample R code, diagnostic quiz questions, hands-on activities in R, curated resources, and a glossary.     

表象训练对体操教学效果的影响

根据体操教材内容特点与学生实际情况，将学生分成两组进行实验，对照组进行了常规教学，实验组在常规教学基础上实施表象训练（思维训练）。实验证明，表象训练的教学效果优于常规教学方法。     

太极拳健身技击科学原理初探

太极拳是中华武术最具代表性的拳种之一,在世界范围内得到了广泛传播,其健身和技击的价值得到了广泛的认同,运用耗散结构理论阐述了太极拳的健身技击原理.     

公安类考生体能测试考前心理状况的调整

运用问卷、文献资料和调查访问等研究方法，对浙江省近两年来公安类考生的考前心理状态进行了分析研究，结果表明，有针对性地从意识和行为上加强应考前心理状态的调整对发挥考生潜能，取得优异成绩有重要意义，针对考生的不利心理状态，提出了消除的方法。     

体育赛事电视节目娱乐化之路——谈湖南卫视电视栏目"国球大典"

“国球大典”由民间海选、大师对抗赛、乒乓嘉年华三大主体活动组成,这种高、低端互动的体育狂欢,创造性地走出了一条体育赛事电视节目“娱乐化”之路,促进了体育与大众传媒的互动与结合,促进了国内体育的市场化发展。     

中、泰两国体育教学的比较

通过对亚洲的中国、泰国体育教学的比较研究，在指导思想、教学目标、教学大纲和教学方式等都存在着较大的差异。汲取泰国在体育与健康方面的长处对我国体育教学改革具有积极的作用。     

透视西部地区民族体育旅游业的社会经济效应

我国西部地区具有丰富的民族体育旅游资源,民族体育旅游业由于其关联与辐射作用而对西部地区社会经济发展具有明显的促进作用.剖析了其在弘扬民族文化,脱贫致富缩小区域差异;促进相关产业发展、优化产业结构;增加外汇收入与回笼货币;增加就业、维护社会稳定等诸方面的促进作用,从而引导人们关注西部民族体育旅游业的重要意义.     

近代西方体育文化的传人及其对中国体育发展的影响

运用文献调研法和理论分析法,对近代西方体育文化的传入过程及其对中国体育发展的影响进行探讨。认为近代西方体育运动文化的传入为我国近代体育运动的兴起与推广提供了新方法与手段;促进了中国体育思想的变革;为中国体育制度的初建提供了范本;为中国体育竞赛制度的形成奠定了基础。     

外来词产生及流行的修辞学理据

外来词属于词汇学的范畴。外来词通过潜词显化、显意符号化、显词重叠化三种途径产生，其中的显词重叠化造成了外来词与汉语词的同义关系，而外来词独特的修辞效果也使人们在同义手段选择活动中更青睐于外来词。