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1.
Antoine Fortier René A. Turcotte 《Sports biomechanics / International Society of Biomechanics in Sports》2014,13(4):341-350
Ice hockey requires rapid transitions between skating trajectories to effectively navigate about the ice surface. Player performance relates in large part to effective change-of-direction manoeuvres, but little is known about how those skills are performed mechanically and the effect of equipment design on them. The purpose of this study was to observe the kinetics involved in those manoeuvres as well as to compare whether kinetic differences may result between two skate models of varying ankle mobility. Eight subjects with competitive ice hockey playing experience performed rapid lateral (90°) left and right change-of-direction manoeuvres. Kinetic data were collected using force strain gauge transducers on the blade holders of the skates. Significantly greater forces were applied by the outside skate (50–70% body weight, %BW) in comparison to the inside skate (12–24%BW, p < 0.05). Skate model and turn direction had no main effect, though significant mixed interactions between leg side (inside/outside) with skate model or turn direction (p < 0.05) were observed, with a trend for left-turn dominance. This study demonstrates the asymmetric dynamic behaviour inherent in skating change-of-direction tasks. 相似文献
2.
金属研磨平板消除冰刀卷刃的实验研究 总被引:3,自引:1,他引:2
研究目的:通过剖析传统研磨冰刀出现卷刃的原因及消除卷刃过程中存在的问题,寻求解决该问题的途径。研究方法:借鉴工业生产中金属研磨平板精研磨理论与实践,运用比较的方法,找出油石研磨冰刀存在的卷刃问题,确定出解决该问题的实验方案。主要结果和结论:设计制造出速滑刀金属研磨平板、勾刃冰刀金属研磨棒。通过实验证明,运用该方法、研磨冰刀刃间面可直接切断卷刃,获得良好的锋刃及滑度,取代传统油石研磨卷刃做法具有可行性。 相似文献
3.
Matej Supej Niels J. Nedergaard Joakim Nord Hans-Christer Holmberg 《Journal of sports sciences》2019,37(6):647-655
Here, we explored the relationship between incline and start strategy during alpine skiing. Eight FIS skiers performed starts on a flat (3°) and steep (21°) incline employing five different strategies. Their times, trajectories and velocities were monitored with a GNSS system and video. A significant interaction was observed between slope incline and start strategy with respect to the skier’s exit velocity (p < 0.001, ?2p = 0.716), but not for the start section time (p = 0.732, ?2p = 0.037). On the almost flat incline, both section time (p = 0.022, ?2p = 0.438) and exit velocity (p < 0.001, ?2p = 0.786) were influenced significantly by start strategy, with four V2 skate-pushes being optimal. On the steep incline, neither section time nor exit velocity was affected significantly by start strategy, the fastest section time and exit velocity being attained with four and two V2 skate-pushes, respectively. In conclusion, these findings demonstrate that the start strategy exerts considerable impact on start performance on almost flat inclines, with strategies involving three or more V2 skate-pushes being optimal. In contrast, start performance on the steep incline was not influenced by strategy. 相似文献
4.
双蹬(又称双推)技术是当今速度轮滑中的先进技术,与传统技术相比它能使运动员获得两次蹬地加速、增加动力性工作、减少速度波动,进而提高全程速度。双蹬技术由特殊收蹬技术与普通侧蹬技术构成,其技术关键环节在于浮腿着地、滑行中的双支撑、上体摆动、几个关键的关节角度及重心移动5方面,正确掌握和运用上述技术要领是提高运动水平、突破运动成绩的有效手段。双蹬技术优越性巨大,上体摆动较大的特点使其更适合长距离、超长距离和马拉松比赛,建议在长距离速度轮滑项目中尽快普及此项技术。 相似文献
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运用标准的三维摄像DLT法测量和录像解析的方法,以参加第十届全国冬季运动会女子500m比赛的部分运动员作为研究对象,对其500m比赛起跑技术进行运动学研究。 相似文献
6.
金喜添 《北京体育大学学报》2008,31(4):575-576
为了解决磨冰刀工作量大、质量难以保证的难题,综合利用机械原理及机械加工手段对现有的磨刀机进行了进一步的研究,研制了便携式多功能冰刀研磨机。叙述了该磨冰刀机的结构、特点及其工作原理。实际使用结果表明,该磨冰刀机具有具有操作简单、磨后的冰刀刃标准精确、多功能、工作效率高、便于携带等优点。该磨冰刀机对我国冰上项目开展与提高具有深远意义。 相似文献
7.
采用文献资料调研、实验检验、几何证明等方法,对检测速滑刀弧度结果不能反映刀弧真实形状的原因展开商榷,分析以固定基准检测速滑刀弧度结果能够反映刀弧真实形状的理论与实验依据。将检测速滑刀弧度的基准触点置于刀刃底面,会因两处基准触点下的刀刃底面被磨削而使测量基准位置发生改变,所测得的弧度结果不能反映出刀弧的真实形状;以固定基准检测速滑刀弧度,刀弧距离测量基准的变量是刀刃底面的实际被磨削量,研磨速滑刀前、后所测得的弧度值能够反映出刀弧度的真实形状。 相似文献
8.
郑雄元 《哈尔滨体育学院学报》2004,22(2)
在分析少年运动员产生心理障碍原因的基础上 ,提出以下对策 :帮助运动员树立正确的训练动机、启发运动员的求知训练欲、培养意志品质、改进训练方法、训练内容多样化提高训练兴趣、建立融洽的师生关系和通过心理训练消除心理障碍等。 相似文献
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clap式冰刀蹬冰动作特点对速滑专项力量训练理念的启示 总被引:3,自引:2,他引:1
通过对2002年世界速滑锦标赛优秀运动员弯道蹬冰技术动作的分析后认为,clap式冰刀与传统冰刀蹬冰过程中肌群工作方式存在着明显的不同。clap式冰刀蹬冰动作遵循大环节带动小环节,由上至下的关节发力顺序规律;而传统式冰刀则是以臀大肌和股四头肌的近固定工作与腓肠肌的远固定工作之合力实现两侧牵拉式伸膝动作。并且提出对速滑蹬冰技术动作的爆发力程度应重新审视的观点。由于肌群工作方式的异同性提示在力量训练理念上,更应加强速度力量性训练手段的选用,提高对肌腱的训练效果,重视专项力量训练对神经系统的作用功效。 相似文献