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1.
太极拳干预社区中老年人亚健康状态的临床随机对照试验   总被引:1,自引:0,他引:1  
目的:评价太极拳干预中老年亚健康的疗效。方法:采用随机单盲方法,将符合亚健康诊断标准的受试者100例,随机分为太极拳干预组和一般运动干预组。两组受试者分别进行每周三次,每次30min的太极拳锻炼和一般体育运动锻炼,疗程均为16周。临床疗效观察采用SF-36生命质量评分。结果:太极拳干预组生命质量干预前后评分差值与一般体育运动组比较显示:在总体健康和生命活力两个维度的差异有统计学意义。结论:太极拳较一般运动能更好地改善中老年亚健康人群生命质量。  相似文献   
2.
采用文献资料法、问卷调查法、数理统计法,对影响福建省青少年游泳运动员比赛表现的影响因素进行研究。经过对34个因素进行因子分析,得出影响运动员比赛表现的影响因素的9个主因子。对9大因子进行分析得知,运动员比赛表现是个人技战术水平、心理能力、客观环境、人为因素、赛前准备、教练信任、对手作用、最佳体验与自我评价等多方面因素影响的结果,为我国游泳运动员训练和赛前控制比赛状态提供理论参考。  相似文献   
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运用人力资本理论,从改善上海市高校体育教师培训质量,优化体育教师人力资本等角度探讨了构建上海市高校体育教师培训体系的必要性,并设计出由培训需求评价、培训计划制定、培训过程实施与控制以及培训效果评估等各环节共同组成的科学培训体系。  相似文献   
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Niche conservatism--the tendency for closely related species to be ecologically similar--is widespread. However, most studies compare closely related taxa that occur in allopatry; in sympatry, the stabilizing forces that promote niche conservatism, and thus inhibit niche shifts, may be countered by natural selection favouring ecological divergence to minimize the intensity of interspecific interactions. Consequently, the relative importance of niche conservatism versus niche divergence in determining community structure has received little attention. Here, we examine a tropical lizard community in which species have a long evolutionary history of ecological interaction. We find that evolutionary divergence overcomes niche conservatism: closely related species are no more ecologically similar than expected by random divergence and some distantly related species are ecologically similar, leading to a community in which the relationship between ecological similarity and phylogenetic relatedness is very weak. Despite this lack of niche conservatism, the ecological structuring of the community has a phylogenetic component: niche complementarity only occurs among distantly related species, which suggests that the strength of ecological interactions among species may be related to phylogeny, but it is not necessarily the most closely related species that interact most strongly.  相似文献   
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情商教育是高校教育中十分重要的环节,对大学生综合素质的培养有着重要意义。目前很多大学生情商较低,拓展训练作为高校情商教育的载体,能够提高大学生自信心、毅力、合作能力、人际交往能力和认知情绪能力。  相似文献   
7.
In metazoans, the Ras-Raf-MEK (mitogen-activated protein-kinase kinase)-ERK (extracellular signal-regulated kinase) signalling pathway relays extracellular stimuli to elicit changes in cellular function and gene expression. Aberrant activation of this pathway through oncogenic mutations is responsible for a large proportion of human cancer. Kinase suppressor of Ras (KSR) functions as an essential scaffolding protein to coordinate the assembly of Raf-MEK-ERK complexes. Here we integrate structural and biochemical studies to understand how KSR promotes stimulatory Raf phosphorylation of MEK (refs 6, 7). We show, from the crystal structure of the kinase domain of human KSR2 (KSR2(KD)) in complex with rabbit MEK1, that interactions between KSR2(KD) and MEK1 are mediated by their respective activation segments and C-lobe αG helices. Analogous to BRAF (refs 8, 9), KSR2 self-associates through a side-to-side interface involving Arg?718, a residue identified in a genetic screen as a suppressor of Ras signalling. ATP is bound to the KSR2(KD) catalytic site, and we demonstrate KSR2 kinase activity towards MEK1 by in vitro assays and chemical genetics. In the KSR2(KD)-MEK1 complex, the activation segments of both kinases are mutually constrained, and KSR2 adopts an inactive conformation. BRAF allosterically stimulates the kinase activity of KSR2, which is dependent on formation of a side-to-side KSR2-BRAF heterodimer. Furthermore, KSR2-BRAF heterodimerization results in an increase of BRAF-induced MEK phosphorylation via the KSR2-mediated relay of a signal from BRAF to release the activation segment of MEK for phosphorylation. We propose that KSR interacts with a regulatory Raf molecule in cis to induce a conformational switch of MEK, facilitating MEK's phosphorylation by a separate catalytic Raf molecule in trans.  相似文献   
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我国大学生体育消费特点呈现多样化的特点:1)体育消费动机多样化;2)实物型体育消费为主、参与型、观赏型体育消费为辅;3)体育消费能力存在较大的差异性。大学生未来的体育消费倾向呈现两大特点:1)体育消费意愿呈现增长态势;2)体育消费投入出现两极分化局面。根据我国大学生体育消费特点提出以下建议:1)加大终身体育教育理念的宣传;2)加大体育消费指导;3)加快学校体育社团建设。  相似文献   
10.
目的:应用全基因组DNA芯片技术分析低盐冷刺激作用下副溶血弧菌基因的转录表达变化.方法:分别采用"低盐持续刺激培养(continuous growth,CTG)"和"中间转入低盐环境培养(shift growth,STG)".CTG和STG下.分别采用含NaCl浓度为2%和0.66%的MV-5培养基孵育副溶血弧菌,收集菌体,提取RNA,应用全基因组DNA芯片分别比较两个不同的转录表达谱基因变化特点,分析其作用规律.同时,应用实时定量逆转录多聚酶联反应对芯片结果进行验证.结果:和对照组相比,STG实验中,共有205个基因的转录表达发生显著性变化,上调的基因占优势地位;CTG实验中,总计有298个基因的转录表达发生显著性变化,上、下涮的基因总体基本趋于平衡状态,没有明显差异.实时定量逆转录多聚酶联反应结果证实其和芯片数据结果有很强的相关性.结论:在低盐这一"胁迫环境"下,副溶血弧菌利用其存在的独特而精细的应对机制,能够顽强的生存下来并繁衍生殖,这一过程中,节能调节处于调控的核心地位.  相似文献   
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