有氧运动对中老年大鼠骨髓内皮祖细胞增殖能力的影响     

龚晓明  郑澜  瞿树林  雷志军  凡婷  陈伊琳 《成都体育学院学报》2014,(10)

目的：探讨有氧运动对中老年大鼠骨髓来源内皮祖细胞增殖能力的影响。方法：健康中年雄性 SD 大鼠12只,按体重随机分为两组,即空白对照组和有氧运动组。采用乳酸阈测定法和递增负荷跑台训练建立有氧运动模型,每周训练6天,为期16周。方案结束后12h 提取大鼠骨髓,运用密度梯度离心法分离得到单个核细胞,以 EGM -2培养诱导其分化获取内皮祖细胞,通过双荧光染色法观察细胞对乙酰化低密度脂蛋白的摄取和与荆豆凝集素1的结合,并结合形态学特征鉴定内皮祖细胞。倒置显微镜下计数贴壁细胞数量和计算集落形成率以反映细胞增殖情况。结果：各组贴壁细胞数量第7d 多于第48h(P <0.01);与对照组相比,有氧运动组贴壁细胞数量明显增加(P <0.01),且集落形成率大(P <0.01)。结论：有氧运动能促进中老年大鼠骨髓来源的内皮祖细胞增殖。  相似文献   

云南特有少数民族武术的形成及其发展战略建构简     

汪雄  冯艳琼  李俊恒 《吉林体育学院学报》2014,(1):95-97

从社会学、文化学、人类学等角度,剖析云南特有少数民族武术的形成与发展过程,并进一步探讨其未来发展路径。研究结果认为：云南特有少数民族武术运动的发展是其各民族在长期的生产生活习俗以及历史文化的积淀过程中逐渐形成的,与其生产、生活、战争以及宗教祭祀活动等有着密切的关联;树立科学合理的认知方式、建立合理的价值取向、实施开发与保护并举将成为发展云南特有少数民族武术的必然选择。  相似文献   

“352”足球比赛阵型训练的探讨     

罗代 《湖北体育科技》2014,(4):319-320

采用文献综述法对"352"阵型的特点以及训练方法进行研究,认为阵型练习时教练员应注意与队员沟通、扬长避短,培养运动员的团队意识。  相似文献   

Running-induced patellofemoral pain fluctuates with changes in patella water content     

《European Journal of Sport Science》2013,13(6):628-634

Abstract

Although increased bone water content resulting from repetitive patellofemoral joint loading has been suggested to be a possible mechanism underlying patellofemoral pain (PFP), there is little data to support this mechanism. The purpose of the current study was to determine whether running results in increases in patella water content and pain and whether 48 hours of rest reduces patella water content and pain to pre-running levels. Ten female runners with a diagnosis of PFP (mean age 25.1 years) participated. Patella water content was quantified using a chemical-shift-encoded water-fat magnetic resonance imaging (MRI) protocol. The visual analog scale (VAS) was used to quantify subjects' pain levels. MRI and pain data were obtained prior to running, immediately following a 40-minute running session, and 48 hours post-running. Pain and patella water content were compared among the 3 time points using one-way ANOVA's with repeated measures. Immediately post-running, persons with PFP reported significant increases in pain and exhibited elevated patella water content. Pain and patella water content decreased to pre-running levels following 48 hours of rest. Our findings suggest that transient changes in patella water content associated with running may, in part, contribute to patellofemoral symptoms.  相似文献   

Placement and frequency of powerless talk and impression formation     

Craig Johnson  Larry Vinson 《Communication quarterly》2013,61(4):325-333

Study One examined the influence of initial use of hesitations and hedges on evaluations of witnesses and their persuasiveness in a budget hearing context. Results indicate that the negative attributions generated by the use of powerless language cannot be overcome by subsequent use of powerful talk. Study Two examined the relationship between the frequency of powerless language use and impression formation. For award/character and dynamism a perceptual threshold appeared to operate. The results of both studies suggest that auditors are very sensitive to the influence of powerless talk in formal settings.  相似文献   

我国星级酒店业知识转化与核心能力形成的相关性研究   总被引：1，自引：1，他引：0  

张同建  吕宝林 《软科学》2010,24(2):19-25

通过对我国星级酒店业知识转化与核心能力培育实践的现实性调查,借助于结构方程模型,揭示了我国星级酒店业知识转化在核心能力培育过程中的微观激励性机理,从而为我国星级酒店业进一步实施知识转化战略、有效地促进核心能力的培育提供了理论上的借鉴。  相似文献   

Intermarriage and imperial subject formation in colonial Taiwan: Shōji Sōichi's Chin-fujin     

Eika Tai 《Inter-Asia Cultural Studies》2013,14(4):513-531

Abstract

In this article, I analyze the political significance of Shōji Sōichi's Chin-fujin (The wife of Mr. Chen), an intricate story of an interracial family in colonial Taiwan struggling to come to terms with their cultural identifications against the backdrop of political upheavals in the late 1910s to the mid-1930s. The novel was well received in wartime Japan and received a 1943 Greater East Asia Literary Prize. Contemporary critics praised it for depicting the perseverance of a Japanese woman married into a Taiwanese family and for representing a Han-Taiwanese intellectual realistically. Yet it was the political effect of the novel that was appreciated by those who selected it for the prize. Shōji demonstrated how the policy and political discourse of the Japanese empire could be acted out in a site of family life, the site that was regarded as critically important for colonial control. He depicted a Taiwanese elite man, his Japanese wife, and their mixed-blood daughter as trying to transcend the old categorical distinction between metropolitan Japanese and natives of Taiwan and seeking a new unified identity position based on colonial Taiwan. I want to show the repressive nature of the national subject formation outlined in this colonial fantasy.  相似文献   

超声骨龄和中国人骨发育判读标准的骨龄判读对比分析   总被引：4，自引：0，他引：4  

蔡广  沈勋章  余卫东  梁佩珍  吴荷萍 《体育科研》2006,27(3):42-44

近年来随着超声的技术发展,正逐渐被应用于骨龄的判读中。与传统的X线判读骨龄相比,超声骨龄可以自行判读,判读过程中客观性高,受人为的主观性影响较小。但是由于其技术较新,其准确性和精确性还需要进一步研究。本文就是对同一批受试者的超声骨龄和中国人骨发育判读标准(CHN)判读结果进行对比性研究,以期对超声骨龄的研究提供一点依据。结果:男女两种测试方法判读结果整体成高度相关,但配对性T检验,两者差异具有显著性。分年龄段的相关性男性大部分相关性在0.6～0.3之间,女性相关性由0.9下降到负相关,按年龄分段T检验男女性别差异大部分均具有显著性,两种方法读数差异在0～1岁之内比例男女分别为54%和59.8%。结论:两种方法判读骨龄有一定的差异,这可能是与人类学发展特点以及两方法所采用的不同的判读标准有关。  相似文献   

女大学生骨质状况调查与相关影响因素分析   总被引：1，自引：0，他引：1  

张林 《中国体育科技》2007,43(2):15-19

为了解女性大学生的骨质状况,探索影响骨峰值的相关因素,对苏州地区199名女性大学生的前臂和跟骨骨密度、形态学指标、身体机能指标进行了测试,并对月经状况和体育锻炼情况进行了调查。研究结果表明,女性大学生的骨健康状况不容乐观,苏州地区女性大学生的骨密度均值低于全国同龄女性;体脂肪量、上臂皮褶厚度、克托莱指数与骨密度呈显著正相关;握力、平衡能力、月经状况和体育锻炼,是骨量生长期女性骨密度的有效影响因子。  相似文献   

骨密度的测定方法及影响因素   总被引：5，自引：0，他引：5  

李旭鸿  侯曼  仰红慧 《天津体育学院学报》2005,20(3):62-65

介绍骨密度测量的常用方法,并系统划分影响骨密度的因素。判断骨密度与年龄的关系,为青少年的年龄推断提供依据,得出骨密度随着年龄的增长而出现与年龄相关的骨质量减少。根据测量青少年的骨密度来解释为什么男孩在青春期后期比女孩发育得快;特别对女性进行调查发现,体重与瘦组织和脂肪组织在男女各个部位的骨密度都有一定的相关性;体育锻炼对其骨质量峰值期和衰老下降期的影响及运动负荷与骨质量的关系,发现女性在绝经后期骨质量快速下降。老年退行性骨质量丢失和绝经后骨质量丢失的综合效应以及峰值骨质量低于男性的特点,使得老年妇女骨质疏松发生的危险性高于任何人,雌激素水平低下是长期的剧烈运动训练引起骨密度偏低的主要原因。  相似文献