Reviewing the Variability-Overuse Injury Hypothesis: Does Movement Variability Relate to Landing Injuries?     

Andrew D. Nordin  Janet S. Dufek 《Research quarterly for exercise and sport》2019,90(2):190-205

Purpose: Overuse injuries are common in sport, but complete understanding of injury risk factors remains incomplete. Although biomechanical studies frequently examine musculoskeletal injury mechanisms, human movement variability studies aim to better understand neuromotor functioning, with proposed connections between overuse injury mechanisms and changes in motor variability. Method: In a narrative review, we discuss the variability-overuse injury hypothesis, which suggests repeated load application leads to mechanical tissue breakdown and subsequent injury when exceeding the rate of physiological adaptation. Due to the multidisciplinary nature of this hypothesis, we incorporate concepts from motor control, neurophysiology, biomechanics, as well as research design and data analysis. We therefore summarize multiple perspectives while proposing theoretical relationships between movement variability and lower extremity overuse injuries. Results: Experimental data are presented and summarized from published experiments examining interactions between experimental task demands and movement variability in the context of drop landing movements, along with comparisons to previous movement variability studies. Conclusion: We provide a conceptual framework for sports medicine researchers interested in predicting and preventing sports injuries. Under performance conditions with greater task demands, we predict reduced trial-to-trial movement variability that could increase the likelihood of overuse injuries.  相似文献   

Could knee joint mechanics during the golf swing be contributing to chronic knee injuries in professional golfers?     

Howie Carson  Jim Richards  Simon G. S. Coleman 《Journal of sports sciences》2020,38(13):1575-1584

ABSTRACT

Full three-dimensional movements and external moments in golfers’ knees and the possible involvement in injuries have not been evaluated using motion capture at high sample frequencies. This study measured joint angles and external moments around the three anatomical axes in both knees of 10 professional golfers performing golf drives whilst standing on two force plates in a motion capture laboratory. Significant differences were found in the knee joint moments between the lead and trail limbs for the peak values and throughout all stages during the swing phase. A significantly higher net abduction moment impulse was seen in the trail limb compared with the lead limb (?0.518 vs. ?0.135 Nms.kg^?1), indicating greater loading over the whole swing, which could contribute to knee lateral compartment or anterior cruciate ligament injuries. A significant correlation (r = ?0.85) between clubhead speed at ball contact and maximum joint moment was found, with the largest correlations being found for joint moments at the top of the backswing event and at the end of the follow-through. Therefore, although knee moments can contribute to high clubhead speeds, the large moments and impulses suggest that they may also contribute to chronic knee injuries or exacerbate existing conditions.  相似文献   

促进高校体育教师科学研究水平的方法与措施     

吴龙 《四川体育科学》2006,(2):110-112

高校体育教师的生命力来自于体育科学研究。高校体育教师必须与体育科学研究紧密的联系在一起。高校体育科学研究就是以高校体育教育现象和体育教育问题为对象,运用科学研究的原则和方法,探寻体育教学规律及有体育教育途径和方法的科学实践活动.努力提高高校体育教师的体育科学研究水平,有利于提高高校体育教师的整体素质,有利于教育科研的发展,提高教育质量。  相似文献   

谈谈分形与混沌     

杨光强 《六盘水师范高等专科学校学报》2004,16(3):14-16

混沌(chaos)是经过整个20世纪才确立下来的一种复杂运动形式,混沌研究隶属于非线性动力学。混沌现象可谓无处不在,它与分形(Fractal)有着密切的联系。伴随计算机等技术的飞速发展,混沌学已发展成为一门影响深远、发展迅速的前沿科学。  相似文献   

人体上下肢长预测方法的研究与应用     

田文秀 《山东体育学院学报》2004,20(3):60-61

人体生长发育过程中，具有非等比性和向心律的特点，在生长发育结束以前测评出的形态比例关系，不能直接说明成熟后的情况。通过对7～18岁儿童少年发育状况的调研，提出了人体上下肢长与身高比例关系的预测方法。  相似文献   

高校体育教学内容与方法的创新研究     

揣佳凡  王红光 《四川体育科学》2004,(3):132-133,139

高校体育教学面临着所未有改革，本文在调查研究和教学实验的基础上，根据社会经济发展的需要，结合高校体育教学实际，对高校体育教学内容与方法及考核评价进行了创新研究。  相似文献   

Wimbledon Results Re-analysed     

K. G. Pangarkar  R. M. Welukar 《Teaching Statistics》1990,12(2):53-54

  相似文献   

优秀男子短跑运动员百米后程跑减速的运动学分析   总被引：2，自引：1，他引：1  

朱耀康 《上海体育学院学报》1994,18(1):61-67

采用高速摄影和影片解析的方法,对我国优秀男子短跑运动员途中跑和后程跑的支撑阶段等技术参数进行比较分析。结果显示,技术动作变形、单步支撑时间延长、步频下降等因素,是导致后程跑减速的主要原因。  相似文献   

田径、举重运动员下肢反应力量能力探析     

郑念军 《山东体育学院学报》2005,21(3):1-5,9

采用国际上通用的反应力量测试手段和方法，对191名田径、举重运动员和普通人进行了实验测试，通过对测试结果的统计分析，发现：（1）田径、举重运动员下肢反应力量测试结果未能表现出运动项目和竞技水平间的显著性差异；（2）跳深实验中，适宜的下落高度随着性别、运动项目、竞技水平等条件的不同，差异较大，因此，判定适宜的下落高度时，最好具体分析，因人而异；（3）起跳时间对于判定适宜的下落高度也有一定影响，准确的适宜下落高度的判定，对于反应力量的训练具有重要意义。  相似文献   

JAVA的静态方法调用     

汪绍荣 《宜春学院学报》2004,26(4):56-58,61

介绍一种数据流程分析，这种分析计算存在不同地址并由方法调用返回的引用．分析的结果用来估算方法调用表达式的动态类型并且用静态调用来取代对就某一个方法定义的所有调用，从而达到利用静态程式分析来确认静态绑定(binding)代替动态调遣的目的．  相似文献