A new footwear technology to promote non-heelstrike landing and enhance running performance: Fact or fad?     

Janet H. Zhang  Aislinn J. C. McPhail  Winko W. An  Waqar M. Naqvi  Daniel L. H. Chan  Ivan P. H. Au 《Journal of sports sciences》2017,35(15):1533-1537

This study sought to compare the kinetics and kinematics data in a group of habitual shod runners when running in traditional running shoes and newly designed minimalist shoes with lug platform. This novel footwear design claims to simulate barefoot running and reduce energy loss during impact. We compared footstrike angle (FSA), vertical average (VALR) and instantaneous (VILR) loading rates, energy loss and initial vertical stiffness between two shoe conditions. Runners demonstrated a decreased FSA while running in minimalist shoes with lug platform than traditional shoes (P = 0.003; Cohen’s d = 0.918). However, we did not observe a landing pattern transition. VALR and VILR between two footwear conditions showed no significant difference (P = 0.191–0.258; Cohen’s d = 0.304–0.460). Initial vertical stiffness (P = 0.032; Cohen’s d = 0.671) and energy loss (P = 0.044; Cohen’s d = 0.578) were greater when running in minimalist shoes with lug platform. The results show that minimalist shoes with lug platform reduce the FSA but may not lead to a landing pattern switch or lower vertical loading rates. Interestingly, the new shoe design leads to a greater energy loss than traditional running shoes, which could be explained by a higher initial vertical stiffness.  相似文献   

《诗经》中明洁的女性情爱     

安成蓉  张梅 《佳木斯教育学院学报》2016,(4):90+92

笔者在前人的研究基础上,从明洁的女性情爱这个视角对《诗经》进行浅析。《诗经》的女性情爱无论是内容还是表达方式都明净、清洁。这种现象也有其特殊的文化背景,那就是上古母系氏族遗风与周礼的制约。  相似文献   

现代通信技术在教学中的应用     

安守桂 《宁德师专学报(自然科学版)》1997,(1)

本文介绍了现代通信技术在教学上应用的重要性及其应用领域,建校园Intranet网并应用WWW是最好的途径。  相似文献   

对人的历史的探询——再谈电影《芙蓉镇》     

安琼 《安顺师范高等专科学校学报》2007,9(4):13-15

电影<芙蓉镇>是在同名小说的基础上通过宏大的历史叙事关照人性和人情,对人的历史进行了更深入的探询.影片把人物放在尖锐环境中去写,多侧面、立体化地展示生活中的小人物,塑造典型环境中的典型形象,再现一个时代,还原历史的真实.影片深刻揭示了人物从人性的压抑到生命的搏斗这一动人心魄的历史.  相似文献   

正交试验设计法应用于煤泥浮选研究     

杨剑  张安  杨通文  严毅 《佳木斯教育学院学报》2016,(4):489

采用正交试验设计研究捕收剂用量、起泡剂用量和矿浆浓度对浮选的影响。结果发现当起泡剂用量为1000g/t,起泡剂为120g/t,矿浆浓度为60g/L时,精煤产率最高,为82.88%。  相似文献   

Assessment of three-dimensional joint kinematics of the upper limb during simulated swimming using wearable inertial-magnetic measurement units     

Silvia Fantozzi  Andrea Giovanardi  Fabrício Anício Magalhães  Rocco Di Michele  Matteo Cortesi  Giorgio Gatta 《Journal of sports sciences》2016,34(11):1073-1080

The analysis of the joint kinematics during swimming plays a fundamental role both in sports conditioning and in clinical contexts. Contrary to the traditional video analysis, wearable inertial-magnetic measurements units (IMMUs) allow to analyse both the underwater and aerial phases of the swimming stroke over the whole length of the swimming pool. Furthermore, the rapid calibration and short data processing required by IMMUs provide coaches and athletes with an immediate feedback on swimming kinematics during training. This study aimed to develop a protocol to assess the three-dimensional kinematics of the upper limbs during swimming using IMMUs. Kinematics were evaluated during simulated dry-land swimming trials performed in the laboratory by eight swimmers. A stereo-photogrammetric system was used as the gold standard. The results showed high coefficient of multiple correlation (CMC) values, with median (first–third quartile) of 0.97 (0.93–0.95) and 0.99 (0.97–0.99) for simulated front-crawl and breaststroke, respectively. Furthermore, the joint angles were estimated with an accuracy increasing from distal to proximal joints, with wrist indices showing median CMC values always higher than 0.90. The present findings represent an important step towards the practical use of technology based on IMMUs for the kinematic analysis of swimming in applied contexts.  相似文献   

理论修养是共产党员的立身之本     

李东友  安秉信 《天津职业院校联合学报》2001,3(3):60-63

以德治国的关键是以德治党.共产党员是我国现代化建设的骨干力量,必须努力提高自身素质,加强自身修养,力求做到德才兼备,成为群众学习的楷模.而要达到这一标准,其最基本的途径是学习理论.该论文集中阐述了刘少奇同志论共产党员理论修养的重要思想,目的在于说明理论修养是共产党员的立身之本.  相似文献   

论"自然教育"目的观的现代价值     

何岸  晋海燕 《天津电大学报》2006,10(1):29-30,39

在当代中国,以素质教育为核心的教育改革正如火如荼地开展起来,创新教育的呼声越来越高,而几百年前轰动一时的“自然教育”似乎被人们遗忘。那么自然教育到底是何种教育呢?一、“自然教育”的产生及发展西方古希腊的亚里士多德把教育看作是依靠内部发展的一种自发实现的过程,并  相似文献   

运用会计实验教学提高会计教学质量   总被引：1，自引：0，他引：1  

安涛 《兰州教育学院学报》2006,(3):51-52

本文就运用会计实验教学培养学生学习兴趣、提高操作技能和理论认识水平等方面进行了探讨。  相似文献   

中国自由职业者审美需要调查研究     

安敏  赵伶俐 《绥化学院学报》2007,27(5):153-156

所谓审美就是人对事物的关照、鉴赏和愉悦体验,它包括审美感知、审美记忆、审美情感、审美理解、审美想象等心理活动过程.审美需要是具有实体性内容的审美价值观念和审美价值取向.[1]本研究通过对中国不同学历层次、不同性别、不同地区的自由职业者进行抽样调查,结果表明:(1)不同学历自由职业者审美需要不均衡,且总体上呈现审美需要水平随学历升高而升高的趋势;(2)不同地区自由职业者审美需要不均衡,大城市的自由职业者的审美需要水平总体上高于中小城市的;(3)不同性别自由职业者审美需要不均衡,女性审美需要水平要高于男性的.  相似文献