A systematic scoping review of study methodology for randomized controlled trials investigating probiotics in athletic and physically active populations

Background:The purported ergogenic and health effects of probiotics have been a topic of great intrigue among researchers,practitioners,and the lay public alike.There has also been an increased research focus within the realm of sports science and exercise medicine on the athletic gut microbiota.However,compared to other ergogenic aids and dietary supplements,probiotics present unique study challenges.The objectives of this systematic scoping review were to identify and characterize study method...     

维吾尔族中学生运动素质的城乡比较

目的了解库车县2所中学13~18岁维吾尔族男、女学生身体素质现状及城、乡差异。方法采用文献资料、问卷调查、测试、数理统计及比较分析等研究方法,对库车县2所城、乡中学的1 460名维吾尔族中学生的速度、爆发力、力量、耐力、柔韧性等身体素质指标进行体质测试及对比分析。同时,对城、乡学校场地器材情况、体育师资力量队伍、开展的课外体育项目以及学生参与课外体育活动、课余锻炼情况、做作业和睡眼时间状况进行对比分析。结果城市和乡村学校维吾尔族中学生50m跑、立定跳远、耐力跑、柔韧性和力量素质之间存在一定的差异。总体上,城市女生除立定跳远成绩优于乡村女生外,其他素质水平乡村男、女生均优于城市男、女生;乡村学生参加课外体育活动时间和次数、积极性,早晨、中午、晚上锻炼时间,睡眼时间等比例高于城市学生。结论库车县城市和乡村维吾尔族中学生身体素质存在差异,相关部门需高度重视,采取有效措施,促进城市和乡村学生健康成长。     

Do PON1-Q192R and PON1-L55M polymorphisms modify the effects of hypoxic training on paraoxonase and arylesterase activity?

Background:Low levels of antioxidant paraoxonase 1(PON 1) enzyme activity,PON1-Q192R polymorphism(a glutamine(Q) to arginine(R)substitution at position 192),PON1-L55M polymorphism(a leucine(L) to methionine(M) substitution at position 55),and oxidized low-density lipoprotein(oxLDL) are risk factors for coronary heart disease.Aerobic exercise improves PON1 activity,but the effects of hypoxic exercise are yet unclear.The aim of this study was to determine the effects of hypoxic underwater rugby tr...     

如何应对新冠肺炎疫情期间的失学问题?

为帮助因新冠肺炎疫情而停课的学生恢复学习能力,世界各国实施了各种助力学生"迎头赶上"的计划.这些计划对教育政策、出资和教学等方面提出了严峻的挑战.     

Response to McAvoy and Tudor-Locke on their commentary on our manuscript: "Association of accelerometer-derived step volume and intensity with hospitalizations and mortality in older adults:A prospective cohort study"

<正>Dear Editor,We have read with interest the commentary by McAvoy and Tudor-Locke¹ on our article entitled "Association of accelerometer-derived step volume and intensity with ho spitalizations and mortality in older adults:A prospective cohort study".² The authors expressed some concerns about our methodology used to define accelerometer-derived step intensity and the analytical approach applied in our study.     

乡村振兴题材的采访技巧分析

选取乡村振兴题材进行新闻采访,应当认识到采访工作对报道效果产生的重要影响.以乡村振兴战略思想为导向,在新闻采访过程中做到反映农民心声、丰富报道角度、注重新闻细节等,能够做到运用采访技巧讲好中国故事,有效助力乡村振兴战略实施.     

Nitrogen addition delays the emergence of an aridity-induced threshold for plant biomass

Crossing certain aridity thresholds in global drylands can lead to abrupt decays of ecosystem attributes such as plant productivity, potentially causing land degradation and desertification. It is largely unknown,however, whether these thresholds can be altered by other key global change drivers known to affect the water-use efficiency and productivity of vegetation, such as elevated CO₂ and nitrogen(N). Using >5000 empirical measurements of plant biomass, we showed that crossing a...     

YTHDF2-mediated regulations bifurcate BHPF-induced programmed cell deaths

N6-methyladenosine(m⁶A) is a critical regulator in the fate of RNA, but whether and how m⁶A executes its functions in different tissues remains largely obscure. Here we report downregulation of a crucial m⁶A reader, YTHDF2, leading to tissue-specific programmed cell deaths(PCDs) upon fluorene-9-bisphenol(BHPF) exposure. Currently, Bisphenol A(BPA) substitutes are widely used in plastic manufacturing.Interrogating eight common BPA substitutes, we detected BHPF in ...