Prevalence and correlates of meeting the muscle-strengthening exercise recommendations among Chinese children and adolescents: Results from 2019 Physical Activity and Fitness in China—The Youth Study

PurposeThis study aimed to describe the national prevalence of Chinese children and adolescents who met the World Health Organization muscle-strengthening exercise (MSE) recommendations and identify correlates of meeting the MSE recommendations.MethodsCross-sectional data from the 2019 Physical Activity and Fitness in China—The Youth Study, a nationally representative sample of Chinese children and adolescents (n = 80,413; mean age = 13.7 years; 53.9% girls) and their parents, were analyzed. Children and adolescents who reported engaging ≥3 days (up to 7 days) of MSE per week were classified as meeting the MSE recommendations. MSE, demographics, lifestyle behaviors (sport participation, moderate-to-vigorous physical activity, screen time, and sleep duration), exercise intention, peer and parental support, and parental MSE participation were assessed through self-reports. Logistic regression models were used to determine the correlates of meeting the MSE recommendations. The analyses were completed in 2020.ResultsOverall, 39.3% of children and adolescents met the MSE recommendations. Girls, 10th–12th graders, minorities, those from lower income households and those from families with lower parental education were less likely to meet the MSE recommendations. Children and adolescents who were proficient in ≥2 sports were more likely to meet the MSE recommendations (adjusted odds ratio (aOR) = 1.44, 95% confidence interval (95%CI): 1.26–1.65), as were those with more moderate-to-vigorous physical activity (aOR = 1.57, 95%CI: 1.53–1.61). Additionally, children and adolescents with high exercise intention (aOR = 1.60, 95%CI: 1.51–1.69), those whose parents met the adult MSE recommendations (aOR = 1.46, 95%CI: 1.40–1.52), and those who received high peer (aOR = 1.27, 95%CI: 1.20–1.34) and parental support (aOR = 1.07, 95%CI: 1.04–1.12) were more likely to meet the MSE recommendations.ConclusionLess than two-fifths of Chinese children and adolescents met the World Health Organization MSE recommendations. The correlates identified in our study can help inform the development of school and community based strategies and policies to enhance participation in MSE and improve muscular fitness of all Chinese children and adolescents.     

中国科技安全图景：成果、问题和未来

      科技安全是新时代科技工作的重大任务之一。现有研究数量较少,又缺乏国外经验借鉴,使得维护国家科技安全成为一个“无人区”,跨过“无人区”需要方向指引。本文研读了与科技安全相关的所有文献,分析了研究的总体情况,归纳整理了研究的具体成果,结合其他信息,对研究及实践的现状及存在的问题进行了总结,展望了中国科技安全研究及实践需解决的关键问题。本研究呈现的中国科技安全研究及实践图景,可为认识中国科技安全研究的历史、研究及实践的现状和未来方向设置提供参考。     

社会转型期大学生道德敏感性的价值

道德是衡量一个社会进步和发展的重要指标,对社会发展具有重要的意义.在当代,中国已经进入到社会的转型期,各种非道德事件屡屡发生,体现了这些主体人道德认识和道德行为之间脱节,而道德敏感性作为影响个体道德认同和道德情感发展的重要因素,具有不可低估的价值.     

高水平乒乓球混合双打运动员在冲突中的行为及其归因

不同类型、性别的高水平乒乓球混合双打运动员在冲突中有不同的行为及其归因,22对初始组合运动员和19对成熟组合运动员完成关系满意度量表和冲突中的行为反应及归因问卷。结果显示,不同性别的高水平乒乓球混双运动员在冲突中的行为反应存在显著差异;成熟组合比初始组合运动员之间在冲突中的行为和原因归因上存在更多差异。     

搞好"三定一聘"深化图书馆改革-南京大学图书馆改革回顾

1991年,国家教委决定南京大学和东南大学作为全国高等院校改革试点单位,先行开展全校范围的校内管理体制改革工作。时至今日,高等院校的内部管理体制改革正在逐步推开,本刊将南京大学改革重要组成部分之一的图书馆改革情况介绍给读者,便于大家借鉴。     

Safety of protease inhibitors and Arbidol for SARS-CoV-2 pneumonia in Zhejiang Province,China

The aim of this study was to evaluate the safety of an antiviral regimen of protease inhibitors combined with Arbidol (umifenovir) for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pneumonia patients. The genomic sequence of SARS-CoV-2 is highly homologous to that of SARS-CoV (Zhou et al., 2020). Previously published basic and clinical research on anti-SARS-CoV treatment found that lopinavir/ritonavir (LPV/r) could improve the prognosis of SARS patients (Chan et al., 2003; Chu et al., 2004). Darunavir (DRV) is another protease inhibitor that blocks the binding of SARS-CoV-2 to human angiotensin-converting enzyme 2 (Omotuyi et al., 2020). The broad-spectrum antiviral drug Arbidol (umifenovir) also shows in vitro anti-SARS-CoV activity (Khamitov et al., 2008).     

MyLibrary@CSDL的实现机制及其再生

介绍了MyLibrary@CSDL的实现机制、功能以及改造它快速建立图书馆公共信息资源导航门户。     

我国高级足球教练员岗位培训教学目标及培训内容的初步研究

对我国甲级足球队教练员的专业知识与能力状况进行调查,并运用计算机进行多因素分析处理,建立了我国高级足球教练员岗位培训教学目标层次体系;根据这一体系确立了岗位培训内容的课程教学层次。     

基于用户贡献的UGC群体分类及其激励因素探讨

UGC是Web 2.0环境下一种新兴的网络信息资源创作与组织模式,其激励因素分析和激励机制设计对于Web 2.0可持续发展至关重要.在综述在线用户分类研究以及UGC动因和激励因素研究现状的基础上,从不同类型和粒度的社会化媒体平台中采集UGC的用户ID和贡献内容数量进行分析,从而构建基于用户贡献度的用户群体分类框架,包括潜水者、普通参与者、活跃参与者以及核心贡献者四个群体;并在此基础上,参考赫兹伯格的双因素理论,通过调研和访谈的方法针对四个不同的用户群体挖掘其在线UGC的保健因素和激励因素,并探讨其相关的激励策略,提出相应的建议.     

如何讲好中国教育故事:需要研探的命题——以中英数学教师交流项目为例

"讲好中国故事,传播好中国声音"是新时代背景下党和国家在中外人文交流领域发出的最强音.中国教育故事是中国故事的重要组成部分,讲好中国教育故事对于凝练中国教育智慧、提振中国教育工作者的信心、提升中国教育的国际影响力与亲和力具有重要意义.但是,提出"讲好中国教育故事"这一命题,并不等于我们已经知道为什么讲、讲什么和怎么讲好故事,更不等于我们已经会讲故事,其中有许多问题有待我们研究和探讨.本文以中英数学教师交流项目为例,就"为什么要讲好故事"、"如何吸引别人来听故事"、"讲什么故事"、"怎么讲故事"和"谁来讲故事"等问题进行研探,以期为我国教育同行"讲好中国教育故事"提供借鉴和启示.