Remote effects of lower limb stretching: preliminary evidence for myofascial connectivity?     

Jan Wilke  Daniel Niederer  Lutz Vogt  Winfried Banzer 《Journal of sports sciences》2016,34(22):2145-2148

The skeletal muscles and the fibrous connective tissue form an extensive, body-wide network of myofascial chains. As fascia can modify its stiffness, strain transmission along these meridians is supposable. The goal of this trial therefore was to collect pilot data for potential remote effects of lower limb stretching on cervical range of motion (ROM). Twenty-six healthy participants (30 ± 6 years) were included in the matched-pairs intervention study. One group (n = 13) performed three 30 s bouts of static stretching for the gastrocnemius and the hamstrings, respectively. An age- and sex-matched control group (CG; n = 13) remained inactive. Pre- and post-intervention, maximal cervical ROM in flexion/extension was assessed. A repeated measures ANOVA revealed systematic differences between groups (P < .05). ROM increased following stretching (143.3 ± 13.9 to 148.2 ± 14°; P < .05) but remained unchanged in the CG (144.6 ± 16.8 to 143.3 ± 16.8°; P > .05). Our data point towards existence of a strain transfer along myofascial meridians. Further randomised controlled studies on conditions, factors and magnitude of tensile transmission are warranted.  相似文献   

A comparison of methods to determine bilateral asymmetries in vertical leg stiffness     

Sean J. Maloney  Iain M. Fletcher  Joanna Richards 《Journal of sports sciences》2016,34(9):829-835

Whilst the measurement and quantification of vertical leg stiffness (K_vert) asymmetry is of important practical relevance to athletic performance, literature investigating bilateral asymmetry in K_vert is limited. Moreover, how the type of task used to assess K_vert may affect the expression of asymmetry has not been properly determined. Twelve healthy males performed three types of performance tasks on a dual force plate system to determine K_vert asymmetries; the tasks were (a) bilateral hopping, (b) bilateral drop jumping and (c) unilateral drop jumping. Across all the three methods, K_vert was significantly different between compliant and stiff limbs (P < 0.001) with a significant interaction effect between limb and method (P = 0.005). Differences in K_vert between compliant and stiff limbs were ?5.3% (P < 0.001), ?21.8% (P = 0.007) and ?15.1% (P < 0.001) for the bilateral hopping, bilateral drop jumping and unilateral drop jumping methods, respectively. All the three methods were able to detect significant differences between compliant and stiff limbs, and could be used as a diagnostic tool to assess K_vert asymmetry. Drop jumping tasks detected larger K_vert asymmetries than hopping, suggesting that asymmetries may be expressed to a greater extent in acyclic, maximal performance tasks.  相似文献   

Dribbling determinants in sub-elite youth soccer players     

Matteo Zago  Andrea Gianluca Piovan  Isabella Annoni  Daniela Ciprandi  F. Marcello Iaia 《Journal of sports sciences》2016,34(5):411-419

Dribbling speed in soccer is considered critical to the outcome of the game and can assist in the talent identification process. However, little is known about the biomechanics of this skill. By means of a motion capture system, we aimed to quantitatively investigate the determinants of effective dribbling skill in a group of 10 Under-13 sub-elite players, divided by the median-split technique according to their dribbling test time (faster and slower groups). Foot-ball contacts cadence, centre of mass (CoM), ranges of motion (RoM), velocity and acceleration, as well as stride length, cadence and variability were computed. Hip and knee joint RoMs were also considered. Faster players, as compared to slower players, showed a 30% higher foot-ball cadence (3.0 ± 0.1 vs. 2.3 ± 0.2 contacts · s^?1, P < 0.01); reduced CoM mediolateral (0.91 ± 0.05 vs. 1.14 ± 0.16 m, P < 0.05) and vertical (0.19 ± 0.01 vs. 0.25 ± 0.03 m, P < 0.05) RoMs; higher right stride cadence (+20%, P < 0.05) with lower variability (P < 0.05); reduced hip and knee flexion RoMs (P < 0.05). In conclusion, faster players are able to run with the ball through a shorter path in a more economical way. To effectively develop dribbling skill, coaches are encouraged to design specific practices where high stride frequency and narrow run trajectories are required.  相似文献   

社区居家养老服务中心体育服务需求与供给研究——以武汉市为例     

代方梅  刘亚奇  杨双  王靖  徐妍 《湖北体育科技》2016,(11):941-944

运用文献资料法、问卷调查法、数理统计法等,对武汉市社区居家养老服务中心的体育服务需求与供给现状进行研究。研究表明:社区老年人有较强的参与体育活动愿望,且参与体育活动在时段选择、时间长度、时间频率、活动强度等方面有着自身的规律;而养老服务中心的体育服务在场地设施、健身指导、信息宣传等方面与老年人的需求存在差距。建议:社会转型期的社区居家养老服务中的体育服务应做到体育服务供给主体多元化、体育服务内容多样化、体育服务人员专业化、体育志愿服务常态化。  相似文献   

文化传递与直译     

黄碧蓉 《邵阳学院学报(社会科学版)》2004,3(5):96-97,100

翻译离不开文化的传递，翻译的主要任务是在的文(target text)中再现原文(source text)的思想内容，促进文化交流。文章从分析东西方文化意义完全不同的两组对应词“龙”和“dragon”与“东风”和“west wind”入手，阐明了翻译中的直译是值得推崇的文化传递途径，其能保留原语文化，使读者感到新鲜生动；能丰富译语文化，扩大读者的知识视野：能促进文化交流，丰富和提高民族文化。  相似文献   

大众文化的兴起     

宋巍 《黑龙江教育学院学报》2008,27(3):100-102

“大众文化”作为一个20世纪新兴的文化现象,有着独特的内涵和特征,对于这一文化现象兴起的原因历来众说纷纭,大众文化兴起的原因主要表现为：（1）科技时代机械复制技术的成果;（2）大众精神层面需求的滋生推进了这一文化现象的产生与发展;（3）产业利润的驱使也推动了这一现象的产生。  相似文献   

对成人心血管机能健康评价的探讨     

朱长征  殷川 《德州学院学报》2003,19(4):87-91

对德州市成人的心血管机能指标：心率、收缩压、舒张压、台阶指数进行分析与评价，结果为下等和差等、研究认为健康意识差、膳食结构不合理、运动习惯差、缺少体育文化氛围是造成现状的重要原因，针对群体状况提出“自我感觉练习法”和几项对策与建议，以指导健身练习。  相似文献   

物理化学实验大循环教学方法初探   总被引：3，自引：0，他引：3  

董丽红  王海燕 《通化师范学院学报》2004,25(2):69-70

探讨了在物理化学实验大循环实验中如何充分利用有限的课堂时间和实验设备完成实验要求的教学方法，这些方法也适用于其他学科的循环实验。  相似文献   

现代远程教育中流课件技术的研究   总被引：2，自引：0，他引：2  

刘春波  徐雷 《现代远距离教育》2005,(6):75-78

本文详细分析了现代远程教育中流课件系统涉及的各项关键技术。在对网络课件分类的基础上首先提出了流课件的概念及特点。接着给出了流课件系统的整体组成。然后阐述了流课件的各个组成部分特别是屏幕内容的实现形式、流课件的文件格式、传输方式以及播放器的设计原则。最后从异构网络传输、编辑与发布自动化和课件保密三个方面对流课件的发展方向做了进一步讨论。  相似文献   

正方介质柱二维光子晶体传输特性FDTD数值研究     

汤炳书  周艳玮  邓睿  丁红星  徐健良  潘友智 《连云港师范高等专科学校学报》2005,(2):100-102

把时域有限差分方法用于二维正方介质柱组成光子晶体传输函数理论研究,计算了若干情况下二维光子晶体的透射率即光传输函数随频率的变化。计算结果表明:对于一定的入射方向,某些频率的光不能在光子晶体中传播即出现所谓的禁带,禁带的宽度、频率范围与晶格结构、柱体截面大小及放置方位有关。  相似文献