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81.
82.
The purpose of this study was to investigate the interaction of foot strike and common speeds on sagittal plane ankle and knee joint kinetics in competitive rear foot strike (RFS) runners when running with a RFS pattern and an imposed forefoot strike (FFS) pattern. Sixteen competitive habitual male RFS runners ran at two different speeds (i.e. 8 and 6?min?mile?1) using their habitual RFS and an imposed FFS pattern. A repeated measures analysis of variance was used to assess a potential interaction between strike pattern and speed for selected ground reaction force (GRF) variables and, sagittal plane ankle and knee kinematic and kinetic variables. No foot strike and speed interaction was observed for any of the kinetic variables. Habitual RFS yielded a greater loading rate of the vertical GRF, peak ankle dorsiflexor moment, peak knee extensor moment, peak knee eccentric extensor power, peak dorsiflexion and sagittal plane knee range of motion compared to imposed FFS. Imposed FFS yielded greater maximum vertical GRF, peak ankle plantarflexor moment, peak ankle eccentric plantarflexor power and sagittal plane ankle ROM compared to habitual RFS. Consistent with previous literature, imposed FFS in habitual RFS reduces eccentric knee extensor and ankle dorsiflexor involvement but produce greater eccentric ankle plantarflexor action compared to RFS. These acute differences between strike patterns were independent of running speeds equivalent to typical easy and hard training runs in competitive male runners. Current findings along with previous literature suggest differences in lower extremity kinetics between habitual RFS and imposed FFS running are consistent among a variety of runner populations. 相似文献
83.
Luiz Carlos Hespanhol Junior Aline Carla Araújo de Carvalho Leonardo Oliveira Pena Costa 《European Journal of Sport Science》2016,16(8):1137-1144
There is conflicting evidence on the association between lower limb alignment characteristics and the incidence of running-related injury (RRI). Therefore, the primary aim of this study was to investigate the association between lower limb alignment characteristics and the incidence proportion of RRI in a convenience sample of recreational runners. A total of 89 recreational runners were included in this prospective cohort study. These participants had been running for at least six months and were injury-free at baseline. Lower limb alignment measurements were conducted in order to calculate lower limb discrepancy, Q-angle, subtalar angle and plantar index. All participants also answered a baseline and biweekly online surveys about their running routine, history of RRI and newly developed RRI over a period of 12 weeks. The prevalence of previous RRI and the 12-week incidence proportion of new RRI were calculated. Logistic regression analysis was performed to estimate the association between lower limb length discrepancy, Q-angle, subtalar angle and plantar ach index with the incidence proportion of RRI. The prevalence of previous RRI was 55.1% (n?=?49). The 12-week incidence proportion of new RRI was 27.0% (n?=?24). Muscle injuries and tendinopathies were the main types of RRI identified. The lower leg and the knee were the main anatomical regions affected. We did not find significant associations between lower limb length discrepancy, Q-angle, subtalar angle and plantar arch index and injury occurrence. 相似文献
84.
学生评教中存在的问题及对策研究 总被引:2,自引:0,他引:2
袁宝菊 《新乡教育学院学报》2006,19(3):28-30
学生评价教师课堂教学质量是实现教学质量自我监控的重要环节之一,有助于保证教育服务质量的稳步上升、学生的健康成长与教师教育水平的提高。但由于种种原因,学生评教时往往会出现评价目的不明、评价形式单一、评价内容片面等诸多问题。要真正实现学生评教的价值,必须对这些问题进行分析,并找出相应的解决方案。 相似文献
85.
目前,我国家庭暴力问题令人担忧,其中重要原因之一是我国现行法律在规制家庭暴力方面存在不足。应制定专门《家庭暴力防治法》,明确《家庭暴力防治法》在法律体系中的地位,明确家庭暴力举证的特殊要求,明确相关机构干预家庭暴力的责任,明确规定施暴者的法律责任,在立法时并对弱势群体有所倾斜。 相似文献
86.
吴玉英 《桂林师范高等专科学校学报》2002,16(2):10-13
对经济全球化的实质、经济全球化给我国带来的正面和负面的影响进行了阐述 ,提出了必须以辩证的、实践的观点看问题 ,根据我国的实际情况 ,采取一系列行之有效的措施 ,积极主动地应对经济全球化的挑战 相似文献
87.
高燕 《乌鲁木齐成人教育学院学报》2007,15(3):78-81
文章从高等函授教育管理工作存在问题出发,分析了导致其走向"滑坡"的根本原因,并相应地提出了完善高等函授教育管理的具体措施。 相似文献
88.
当前大学生犯罪原因与预防对策 总被引:1,自引:0,他引:1
当前大学生犯罪呈现出新的趋势,原因包括主观和客观两个方面.预防大学生犯罪,学校要加强教育和管理;家庭要营造良好的家庭氛围;司法机关可以适时作出司法建议. 相似文献
89.
浅谈网络对青少年犯罪的影响及预防对策 总被引:3,自引:0,他引:3
网络对当代青少年来讲,既有正面影响,又有负面影响。其负面影响主要体现在强势文化,无政府主义倾向,对青少年心理意识和角色意识的影响,网络成为影响青少年犯罪一个不可忽视的因素。为了促进青少年健康成长,维护社会稳定,必须采取相应对策,即加强网络道德建设与构筑“三位一体”的教育网络,减少网络对青少年产生的负面影响。 相似文献