Fatigue increases ankle sprain risk in badminton players: A biomechanical study     

Alexis Herbaut  Julien Delannoy 《Journal of sports sciences》2020,38(13):1560-1565

ABSTRACT

Ankle sprains are the most common injury in regular badminton players and usually occur at the end of a match or training. The purpose of the present study was to examine the influence of fatigue produced by badminton practice on the lower limb biomechanics of badminton players. It was hypothesized that fatigue induces ankle kinematic and lower leg muscle activity changes which may increase the risk of ankle sprain. Ankle kinematics, ankle kinetics and muscles activities of 17 regular badminton players were recorded during lateral jumps before and after an intense badminton practice session. Post-fatigue, ankle inversion at foot strike and peak ankle inversion increased (+2.6°, p = 0.003 and +2.5°, p = 0.005, respectively). EMG pre-activation within 100 ms before foot landing significantly decreased after fatigue for soleus (?23.4%, p = 0.031), gastrocnemius lateralis (?12.2%, p = 0.035), gastrocnemius medialis (?23.3%, p = 0.047) and peroneus brevis (?17.4%, p = 0.036). These results demonstrate impaired biomechanics of badminton players when fatigue increases, which may cause a greater risk of experiencing an ankle sprain injury.  相似文献   

东盟区域龙狮运动国际传播的伦理困境     

王湘丽  张智 《体育科技文献通报》2020,(2):11-13

东盟区域龙狮运动传播过程中伦理困境的解决是促进龙狮运动在国际上传播的重要影响因素。面对传播者的行为瓶颈问题,应从提高传播者的道德意识做起;面对传播媒介沦陷的问题,应注意龙狮运动传播媒介作用的正确发挥;面对中西方文化差异问题,应促进各国文化的融合;面对受众对龙狮运动的误解,应扩大对龙狮运动的正面宣传。深入解决龙狮运动传播的伦理困境,加快龙狮文化的国际传播脚步。  相似文献   

优秀沙排运动员薛晨肩关节脱臼的运动功能康复训练效果分析     

罗晨  张梦雪  薛晨  林万珩 《北京体育大学学报》2017,40(6):60-65

摘要：目的：通过对我国优秀沙滩排球运动员薛晨肩关节脱臼术案例进行分析，探索优秀运动员备战奥运会期间从手术后到重返训练场间的身体运动功能康复训练安排。方法：借鉴重返赛场训练的方法手段，从康复医学、体能训练和运动表现等多学科角度设计有针对性的康复训练方法。通过对比训练前后关节活动度、肌肉力量、功能动作筛查结果以及下肢力量爆发力测试结果检验以优秀沙滩排球运动员肩关节脱臼为个案分析重返赛场的可行性训练策略。结果：通过10周身体运动功能训练，运动员下肢爆发力、损伤侧肩关节内外旋活动度、均有所增加。功能动作筛查分数降低。但损伤侧肩关节内旋肌力、腹侧核心耐力有所下降。结论：以优秀沙滩排球运动员肩关节脱臼重返赛场的训练策略为个案分析，探索从运动损伤术后至重返赛场训练过程的周期安排、训练方法的有效性；通过科学整合康复训练、体能训练和专项技术训练不同训练内容，循序渐进的帮助运动员恢复专项技术和运动能力。  相似文献   

Swedish PE teachers’ understandings of legitimate movement in a criterion-referenced grading system     

Lena Svennberg 《Physical Education & Sport Pedagogy》2017,22(3):257-269

Background: Physical Education (PE) has been associated with a multi-activity model in which movement is related to sport discourses and sport techniques. However, as in many international contexts, the Swedish national PE syllabus calls for a wider and more inclusive concept of movement. Complex movement adapted to different settings is valued, and in the national grading criteria qualitative measures of movement are used. This research seeks to examine how the wider concept of movement is interpreted and graded. Drawing on Bernstein’s concept of the pedagogic device, the paper explores teachers’ roles as active mediators in the transformation of national grading criteria for movement and the kinds of movement that are valued in teachers’ grading practices. Purpose: The purpose of this study is to investigate what PE teachers consider legitimate movement in a criterion-referenced grading system and the factors that influence their grading practice. The Repertory Grid (RG) technique was employed in order to access their tacit knowledge. Methodology: Seven Swedish PE teachers were interviewed, all of whom teach and grade years seven to nine in different compulsory schools. Using the RG technique, the teachers were asked to reflect on the aspects they considered important for achieving a high grade. The national grading criteria for years seven to nine were then presented one at a time and the teachers were asked to describe how they assessed and graded each requirement. The teachers were also asked whether any specific factors had influenced their grading. In the content analysis, the second part of the interview was attended to first and the results were interpreted in light of Bernsteins’ concept of the pedagogic device. Findings: Sport techniques and competitive sports influenced the teachers’ interpretations of what constitutes complex movement. The aspect of fitness also appeared to be valued by the teachers in that it facilitates the valued movement. In some cases the difficulty of describing movement qualities in words could reduce the concept of movement to something measurable and quantifiable. The teachers’ concerns about students’ unequal opportunities to develop and demonstrate their skills also influenced the teachers’ interpretation of complex movement. Conclusions: In the transformation of national grading criteria to grading practice, the pedagogic actions taken inform and limit the way in which legitimate movement in PE is conceptualised. Adopting a concept of movement that is wider than competitive sports allows the structures of inequality to be addressed and enables the movements performed by students with other moving experiences than competitive sports to be valued. The tension between the demands of transparency in a high stakes grading system and the inability to articulate the quality of complex movements is problematic. There is a need to verbalise teachers’ conceptions about physical education knowledge to be able to discuss and develop the concept of movement. In this process, the RG technique is a potentially useful tool. Having the language to discuss movement qualities also enables us to strengthen the interrelation between curriculum, pedagogy and assessment.  相似文献   

Effect of Active Lessons on Physical Activity,Academic, and Health Outcomes: A Systematic Review     

Rosemarie Martin  Elaine M. Murtagh 《Research quarterly for exercise and sport》2017,88(2):149-168

Purpose: The purpose of this study was to conduct a systematic review of classroom-based physical activity interventions that integrate academic content and assess the effectiveness of the interventions on physical activity, learning, facilitators of learning, and health outcomes. Method: Six electronic databases (ERIC, PubMed, Google Scholar, Science Direct, Cochrane Library, and EMBASE) and reference lists were searched for English-language articles, published January 1990 through March 2015, reporting classroom-based interventions that deliberately taught academic content using physically active teaching methods for at least 1 week duration, with physical activity, health, learning, or facilitators-of-learning outcomes. Two authors reviewed full-text articles. Data were extracted onto an Excel spreadsheet, and authors were contacted to confirm accuracy of the information presented. Results: Fifteen studies met the inclusion criteria. Six studies reporting on physical activity levels were found to have medium-to-large effect sizes. All 4 studies reporting learning outcomes showed positive effects of intervention lessons. Teachers and students were pleased with the programs, and enhanced on-task behavior was identified (n = 3). Positive effects were also reported on students’ body mass index levels (n = 3). Conclusions: Physically active academic lessons increase physical activity levels and may benefit learning and health outcomes. Both students and teachers positively received and enjoyed these teaching methods. These findings emphasize the need for such interventions to contribute toward public health policy.  相似文献   

Improved children’s motor learning of the basketball free shooting pattern by associating subjective error estimation and extrinsic feedback     

Leandro de Carvalho da Silva  Carla Ferro Pereira-Monfredini 《Journal of sports sciences》2017,35(18):1825-1830

This study aimed at assessing the interaction between subjective error estimation and frequency of extrinsic feedback in the learning of the basketball free shooting pattern by children. 10- to 12-year olds were assigned to 1 of 4 groups combining subjective error estimation and relative frequency of extrinsic feedback (33% × 100%). Analysis of performance was based on quality of movement pattern. Analysis showed superior learning of the group combining error estimation and 100% feedback frequency, both groups receiving feedback on 33% of trials achieved intermediate results, and the group combining no requirement of error estimation and 100% feedback frequency had the poorest learning. Our results show the benefit of subjective error estimation in association with high frequency of extrinsic feedback in children’s motor learning of a sport motor pattern.  相似文献   

运动诱导神经发生的相关研究     

张宪亮  徐波 《体育成人教育学刊》2011,27(5):35-39

成年哺乳动物神经发生仅发生在侧脑室的室管膜下层和海马齿状回的颗粒细胞下层两个区域。综述了检测神经发生的主要方法,从神经递质、生长因子、营养因子等方面探讨了运动诱发神经发生的相关机制,并分析了运动诱发的神经发生对学习记忆能力的意义。  相似文献   

当代高低杠成套动作编排发展态势的研究     

竭晓安 《北京体育大学学报》2016,39(2):111-115

摘要：里约奥运周期高低杠成套动作的编排与伦敦奥运周期相比发生了较大变化，要保持我国的高低杠优势，编出符合国际潮流和有竞争力的高低杠成套动作，就必须了解当代国际高低杠成套动作编排的发展态势。本文通过技术统计、录像观察、比较分析等研究方法，分别选取伦敦和里约两个奥运周期中（2010年—2014年）的4届世锦赛和1届奥运会体操比赛的40套高低杠决赛动作为观察统计对象，对两个奥运周期成套动作的上法、下法、换杠动作、杠中动作、连接加分以及成套动作的数量进行了全面、深入的对比分析，得出当代高低杠成套动作编排的发展态势是：上法以A组低难度为主；换杠动作加难、加长，连续飞行换杠将成为潮流；杠中动作数量有所减少，成套动作的编排趋向于高难动作直接相连，成套动作数量将趋于减少；下法将朝着“旋空翻”的方向发展。  相似文献   

下肢离心练习对提高女排运动员移动速度作用的实验研究     

张明 《北京体育大学学报》2016,39(6):127-132

摘要：旨在探讨下肢离心负荷练习对排球运动员移动制动的影响,在现有发展运动员下肢力量常用手段的基础上,加入了离心训练手段,来提高排球运动员移动制动的效果。研究主要采用实验法，对28名高水平排球运动员（10名国家级健将和18名国家一级运动员）进行对照组与实验组研究，进行为期8周的下肢离心力量训练和传统下肢力量训练，并进行对比分析。研究结果表明,实验组和对照组下肢离心力量指标有差异。实验组下肢离心力量指标、专项移动速度的提高均显著优于对照组,具体结论如下:下肢离心力量训练与传统下肢力量训练均能改善下肢肌肉的最大离心力量。下肢离心力量训练对移动制动能力的改善效果显著优于进行传统力量训练。  相似文献   

商洛市知青运动研究     

陈维旭 《商洛学院学报》2011,25(3)

"文革"初年商洛市受到了全国知识青年"上山下乡"再锻炼社会思潮的影响,商洛"老三届"毕业生的知青运动发展到了高潮.知青运动在商洛市虽未能解决体制性的就业问题,但仍然磨练了一代人.通过考察"文革"前后商洛市的知青运动,力求还原商洛市知青的原貌,给予商洛市知青运动客观、公正地评价,对后人观照"文革"具有一定借鉴意义.  相似文献