Does inside passing contribute to the high incidence of groin injuries in soccer? A biomechanical analysis

Groin injuries are common in soccer and often cause time-loss from training. While groin injuries have been linked to full effort kicking, the role of inside passing is unclear. Therefore, the purpose of this study was to investigate hip joint kinematics and muscle force, stress and contraction velocity for adductor longus and gracilis during inside passing. 3D kinematics of ten soccer players (23.4 yrs; 77.5 kg; 1.81 m) were captured with a motion capture system inside a Footbonaut. Muscle force and contraction velocity were determined with AnyBody Modelling System. Gracilis muscle forces were 9% lower compared to adductor longus (p = 0.005), but muscle stress was 183% higher in gracilis (p = 0.005). Contraction velocity reveals eccentric contraction of gracilis in the last quarter of the swing phase. Considering the combination of eccentric contraction, high muscle stress and the repetitive nature of inside passing, gracilis accumulates high loads in matches and training. These results indicate that the high incidence of groin injuries in soccer could be linked to isolated pass training. Practitioners need to be aware of the risk and refrain from sudden increases in the amount of pass training. This gives the musculoskeletal system time to adapt and might avoid career threatening injuries.     

Effects of Aerobic Exercise on Cognitive Performance Among Young Adults in a Higher Education Setting

Purpose: Acute benefits of aerobic exercise on executive functioning have been reported frequently under laboratory conditions. However, to date, a beneficial effect on long-term memory has been less well supported and no data are available regarding nonlaboratory conditions in young adults. The aim of the current study was to investigate acute effects of aerobic exercise on cognitive functioning in a university classroom setting. Method: Using a cross-over design, 51 participants performed a bout of moderately intense running (RUN) and read an article while seated (CON). Afterwards, they completed free-recall tests, followed by a Flanker task and an n-back task. Results: Participants in the RUN condition compared with those in the CON condition showed shorter reaction time on the inhibition task, F(1, 50) = 5.59, p = .022, η² = .101, and recalled more words in the immediate- and delayed-recall tests, F(1, 50) = 8.40, p = .006, η² = .144. Conclusion: The present findings suggest that a moderately intense bout of aerobic exercise benefits verbal short-term and long-term memory as well as inhibitory control among students in a classroom setting.     

Sportbezogenes Handeln in virtuellen sozialen Netzwerken

Adolescent living environments are highly influenced by the media and virtual social networks are becoming increasingly more important as mediators of the social environment and as distinct realities. In virtual rooms adolescents can interact, present themselves, show their social embedding in relationships and groups, and experience recognition and affirmation. Social networks offer space for dealing with juvenile developmental tasks and productive negotiations of identities. The increase in internet-based leisure patterns in adolescence is often described as a displacement of sport activities, although current studies report rather independent or engaging relations between physical and media activities. In social networks, such as facebook or instagram, a multitude of sporting scenes and topics can be found, whether this involves (audio)visual representations of individual sport activties, fan affiliation to professional sport, or virtual fitness programs. This study analyzes the meaning and relevance of the sport-related use of social networks for sport activties and the development of sporting identities. In qualitative guideline interviews with young adults (n =10) from various sporting contexts, three meaningful threads of a sport-related use of social networks for sport activities were identified: organization of sport activities, improvement of sporting abilities, and increase in motivation. Furthermore, the interviews disclosed three relevant concepts of sporting identities within the sport-related use of social networks that largely correspond with developmental tasks. The empirical findings reveal differentiated insights into the meaning of the sport-related use of social networks and confirm a high relevance for sport activities of young adults and the development and negotiation of their sporting identities.     

论徐渭的游幕生涯与文学创作

徐渭的文学创作与游幕生涯患息相关.在明代幕府制度下,文人的游幕带有维持生活的经济目的.但他们的经济条件并未由此根本改观.游幕为徐渭等布衣之士提供了近距离接触军国大事和开阔视野的良机,还能藉此广交诗朋文友,进而丰富了文学创作的题材与内容.     

赵翼、袁枚诗学观异同初探

学界谈论赵翼、袁枚,多注重二人的相同点,对其诗学观之不同,则少有探究.本文从二人在诗歌创作的性情、才思、养气三方面,探究其不同.     

比体和赋体：象征性诗歌意象研究

象征性诗歌以意象暗示呈现象征意义.其意象的构成方式主要有两种:一种是以意象间的比喻关系构成,即比体象征意象;一种是以意象的连续铺展、延伸构成,即赋体象征意象.这两种意象有诸多不同,弄清它们的构成方式及其特点,将有助于诗歌创作和鉴赏.     

我国优秀男子110m栏运动员专项能力典型指标与专项成绩的多元回归分析

本文综合运用文献法、问卷调查法、访谈法、数理统计法等研究方法,从专项训练学角度出发,建立了我国优秀男子110m栏运动员专项能力典型指标体系和专项成绩的多元回归模型,以使我国优秀男子110m栏运动员专项能力定量化训练有据可依.     

大学生逃课现象之我见

大学生逃课是大学校园内外众人皆知的现象,应解决的问题是大学生逃什么课?为什么逃课?如何解决?教育教学改革是解决学生逃课问题的关键所在.首先是提高教师素质,提高教师的授课水平;其次是要实现从计划学分制逐渐转向完全学分制,增加选修课的范围;再次是要引进竞争机制,改变教师聘用制度中重科研轻教学的局面.     

高校辅导员队伍专业化建设的制度保障

加强制度建设是实现高校辅导员队伍专业化发展的关键.通过建立严格的选聘管理制度、完善的培训提高制度和科学的考核激励等制度,打好辅导员专业化发展基础,加强辅导员专业化能力培养,鼓励辅导员走专业化发展道路.     

高职旅游管理专业体验式教学法探讨

高职旅游管理是一个实践性与应用性较强的专业,与传统的教学法相比,体验式教学法更注重将理论与实践结合。通过体验式教学法在旅游管理专业的推应用,表明体验式教学法更能突出教学过程中的学生主体性,增强专业学习的主动性和积极性。