Shoe drop reduction influences the lower limb biomechanics of children tennis players during an open stance forehand: A longitudinal study

Compared to traditional tennis shoes, using 0-drop shoes was shown to induce an immediate switch from rear- to forefoot strike pattern to perform an open stance tennis forehand for 30% of children tennis players. The purpose of the study was to examine the long-term effects of a gradual reduction in the shoe drop on the biomechanics of children tennis players performing open stance forehands. Thirty children tennis players participated in 2 laboratory biomechanical test sessions (intermediate: +4 months and final: +8 months) after an inclusion visit where they were randomly assigned to control (CON) or experimental (EXP) group. CON received 12-mm-drop shoes twice, whereas EXP received 8?mm then 4-mm-drop shoes. Strike index indicated that all CON were rearfoot strikers in intermediate and final test sessions. All EXP were rearfoot strikers in intermediate test session, but half the group switched towards a forefoot strike pattern in final test session. This switch resulted in a decreased loading rate of the ground reaction force (?73%, p?=?.005) but increased peak ankle plantarflexors moment (+47%, p?=?.050) and peak ankle power absorption (+107%, p?=?.005) for these participants compared with CON. Biomechanical changes associated with the long-term use of partial minimalist shoes suggest a reduction in heel compressive forces but an increase in Achilles tendon tensile forces.     

Let Our Souls Keep Up With Our Pace

The National Museum witnessed record visitors during the na- tional holiday. The deputy cu-rator, Chen Lvsheng, is excited to see such a change. He looks forward to one day when public cultural spaces like museums and galleries would become a city＇s living room tot guests, and a life- time classroom for every person. None- theless, Chen is not expecting quick re- suits, because “ cultural development requires time and education”.     

“弱水”与“昆仑山”

<正>鲁迅在杂文《热风·随感录六十二恨恨而死》中写道,对于那些一味愤愤不平、自暴自弃以致"恨恨而死"的人们,"应该趁他们活着的时候问他:诸公!您知道北京离昆仑山几里,弱水去黄河几丈     

孩子的来历与归属——神话传说背后的上古风习

一女娲是中国古代最著名的女神之一,其神奇之处一是治水,二是补天,三是造人。她的造人完全自力更生,无须外力,乃是典型的＂孤雌生殖＂。《太平御览》卷七十八引《风俗通》云：     

基于SEM模型的中学生体育健康行为调查研究

运用文献资料法、数理统计法、调查法,根据我国健康行为教育开展情况,构建中学生体育健康行为干预模型,通过分析模型得出对中学生体育健康行为干预首要考虑的是情绪调控,其次分别是健康知识、锻炼意识及环境适应,并给出在体育教学中实际中学生健康行为发展干预的相关建议,明确体育健康行为教育的目的性、有效性,为当前学校体育教育落实提升学生核心素养提供力所能及的帮助。     

Linux怎么给一个普通用户关机权限

随着Linux操作系统的广泛应用,Linux操作系统的日常管理的繁琐性越来越突出,本文从操作便捷、安全的角度,分五种情况分析讨论了Linux操作系统的日常关机问题。     

教学质量控制中过程方法应用的研究

文章从过程方法的原理出发,阐述了过程方法对质量控制的有效性,探讨了过程方法在教学质量控制中应用的具体做法,并着重提出在教学过程质量控制中应用过程方法时需要重视的问题。     

构建基于市场评判的高等教育质量观及其预警机制

增强高校社会适应性,构建基于市场评判的教育质量观及其预警机制是我国高等教育改革与发展过程中急需解决的重大现实问题,而建立质量预警指标,构建预警组织机构是保证预警机制有效运行的关键。     

Toward nanoscopic cellular imaging by X-ray

X-ray spectroscopy has nanometer spa-tial resolution,long penetration depth and excellent elemental specificity.The power of synchrotron-based X-ray mi-croscopy...