首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 15 毫秒
1.
Goaltenders in ice hockey are the only players that are on the ice for the entire game. Their position exposes them to impacts from collisions with other players, falls to the ice, and puck impacts. In competitive ice hockey leagues, head injuries resulting from puck impacts have been reported with some cases resulting in ending the player’s career. Considerable research has been conducted to assess the performance of hockey helmets; however, few have assessed the performance of goaltenders’ masks. The purpose of this study was to compare the capacity of four goaltenders’ masks for the protection from puck impact as measured by head acceleration and peak force. A Hybrid III headform was fitted with four different goaltender masks and impacted with a hockey puck in three locations at 25 m/s. The masks were found to vary in the level of protection they offered as the mask with the thickest liner resulted in lower forces than the thinnest mask for side impacts; however, the thinnest mask resulted in the lowest force for front impacts. Despite performance differences at specific locations, no one mask proved to be superior as peak acceleration and peak force values did not exceed the thresholds necessary for concussion.  相似文献   

2.
ABSTRACT

Goaltenders in the sport of ice hockey are at high risk for concussions from falls to the ice, player collisions and puck impacts. However, current methods used to certify helmets only consider head accelerations for drop tests which may not describe all common injury mechanisms relating to concussion. The purpose of this study was to describe the characteristics of 3 events associated with concussions for ice hockey goaltenders. A helmeted medium National Operating Committee on Standards for Athletic Equipment (NOCSAE) headform was impacted under conditions representing 3 injury events. Three impact locations’ velocities were selected for each event based on video analysis of real-world concussive events. Peak resultant linear acceleration, rotational acceleration and rotational velocity of the headform were measured. The University College Dublin Brain Trauma Model (UCDBTM) was used to calculate maximum principal strain (MPS) and von Mises stress in the cerebrum. Each impact event produced a unique dynamic response and brain stress and strain values. This demonstrates that a single impact event (i.e. falls) cannot adequately describe all impact events. As a result, impact protocols which assess multiple impact events such as the protocol described in this study should be used to evaluate ice hockey goaltender masks.  相似文献   

3.
通过对参加3届亚洲冰球联赛的齐齐哈尔市冰球一队射门与被射门临场数据统计分析,认为射门技术动作与射门次数关系密切,个人射门技术动作对比赛起重要作用。因此,对个人射门技术动作能力的培养与射门质量效果的训练已刻不容缓。  相似文献   

4.
Abstract

In interceptive timing tasks, long quiet eye (QE) durations at the release point, along with early tracking on the object, allow performers to couple their actions to the kinematics of their opponent and regulate their movements based on emergent information from the object's trajectory. We used a mobile eye tracker to record the QE of eight university-level ice hockey goaltenders of an equivalent skill level as they responded to shots that deflected off a board placed to their left or right, resulting in a trajectory with low predictability. QE behaviour was assessed using logistic regression and magnitude-based inference. We found that when QE onset occurred later in the shot (950?±?580?ms, mean?±?SD) there was an increase in the proportion of goals allowed (41% vs. 22%) compared to when QE onset occurred earlier. A shorter QE duration (1260?±?630?ms) predicted a large increase in the proportion of goals scored (38% vs. 14%). More saves occurred when QE duration (2074?±?47?ms) was longer. An earlier QE offset (2004?±?66?ms) also resulted in a large increase in the number of goals allowed (37% vs. 11%) compared to a later offset (2132?±?41?ms). Since an early, sustained QE duration contributed to a higher percentage of saves, it is important that coaches develop practice activities that challenge the goaltender's ability to fixate the puck early, as well as sustain a long QE fixation on the puck until after it is released from the stick.  相似文献   

5.
Research has revealed that individual soccer goalkeepers respond differently to penalty shots, depending on their specific perceptual and motor capabilities. However, it remains unclear whether analogous differences exist between individual penalty takers, and if specialising in penalty taking affects the occurrence of differences between individuals. The present study examined individual differences in penalty shot speed and accuracy for specialists in penalty taking versus non-specialists. Expert specialist field hockey drag flickers and equivalently skilled non-specialists performed drag flicks towards predetermined targets placed in the face of a standard field hockey goal. Comparisons in shot speed and accuracy were made at a group level (specialists vs. non-specialists) as well as between individuals. Results revealed differences in both speed and accuracy between specialists, but only differences in speed between non-specialists. Specialists generated significantly greater shot speed than non-specialists (P < .001) and were more accurate to some, but not all, targets (top left, P < .006, bottom left P < .001). In addition, it was found that in specialists increasing practice correlated with decreasing accuracy. This may indicate that excessive practice could potentially reduce a specialist’s accuracy in shooting towards specific targets.  相似文献   

6.
The purpose of this study was to identify joint angular kinematics that corresponds to shooting accuracy in the stationary ice hockey wrist shot. Twenty-four subjects participated in this study, each performing 10 successful shots on four shooting targets. An eight-camera infra-red motion capture system (240 Hz), along with passive reflective markers, was used to record motion of the joints, hockey stick, and puck throughout the performance of the wrist shot. A multiple regression analysis was carried out to examine whole-body kinematic variables with accuracy scores as the dependent variable. Significant accuracy predictors were identified in the lower limbs, torso and upper limbs. Interpretation of the kinematics suggests that characteristics such as a better stability of the base of support, momentum cancellation, proper trunk orientation and a more dynamic control of the lead arm throughout the wrist shot movement are presented as predictors for the accuracy outcome. These findings are substantial as they not only provide a framework for further analysis of motor control strategies using tools for accurate projection of objects, but more tangibly they may provide a comprehensive evidence-based guide to coaches and athletes for planned training to improve performance.  相似文献   

7.
Goaltender leg pad innovations, whether the result of professional player feedback or National Hockey League equipment regulations, are rarely tested for their effects on the goaltender’s body. This study quantified peak drop velocity and range of motion of four different ice hockey goalie leg pads with respect to the goaltenders’ legs during butterfly manoeuvres. Twelve junior goaltenders, ranging from 16 to 20 years of age, performed five butterfly manoeuvres in each of the four leg pad conditions (flexible-tight leg channel, flexible-wide leg channel, stiff-wide leg channel and control). The pad conditions followed similar kinematic patterns in the sagittal and frontal planes. In the transverse plane, the stiff-wide pad achieved significantly greater external rotation (~10°) during the butterfly compared to the flex-tight and the flex-wide leg pad conditions. Goaltenders performed significantly faster butterflies in the flex-tight (3.05 m/s) and the flex-wide (3.0 m/s) leg pad conditions compared to their own control (2.82 m/s) leg pads (P = 0.018 and P = 0.004, respectively). The kinematic information obtained during this study provides ice hockey goaltender equipment manufacturers with a baseline understanding of how leg pads move with respect to the goaltender’s legs. Future leg pad modifications can then be compared to these data to understand the modification’s effect on the goaltender’s body and performance ensuring that leg pads continue to improve both the safety and performance of goaltenders.  相似文献   

8.
The purpose of this study was to identify joint angular kinematics that corresponds to shooting accuracy in the stationary ice hockey wrist shot. Twenty-four subjects participated in this study, each performing 10 successful shots on four shooting targets. An eight-camera infra-red motion capture system (240 Hz), along with passive reflective markers, was used to record motion of the joints, hockey stick, and puck throughout the performance of the wrist shot. A multiple regression analysis was carried out to examine whole-body kinematic variables with accuracy scores as the dependent variable. Significant accuracy predictors were identified in the lower limbs, torso and upper limbs. Interpretation of the kinematics suggests that characteristics such as a better stability of the base of support, momentum cancellation, proper trunk orientation and a more dynamic control of the lead arm throughout the wrist shot movement are presented as predictors for the accuracy outcome. These findings are substantial as they not only provide a framework for further analysis of motor control strategies using tools for accurate projection of objects, but more tangibly they may provide a comprehensive evidence-based guide to coaches and athletes for planned training to improve performance.  相似文献   

9.
The aim of this study was to examine the relationships among biological maturity, physical size, relative age (i.e. birth date), and selection into a male Canadian provincial age-banded ice hockey team. In 2003, 619 male ice hockey players aged 14-15 years attended Saskatchewan provincial team selection camps, 281 of whom participated in the present study. Data from 93 age-matched controls were obtained from the Saskatchewan Pediatric Bone Mineral Accrual Study (1991-1997). During the initial selection camps, birth dates, heights, sitting heights, and body masses were recorded. Age at peak height velocity, an indicator of biological maturity, was determined in the controls and predicted in the ice hockey players. Data were analysed using one-way analysis of variance, logistic regression, and a Kolmogorov-Smirnov test. The ice hockey players selected for the final team were taller, heavier, and more mature (P < 0.05) than both the unselected players and the age-matched controls. Furthermore, age at peak height velocity predicted (P < 0.05) being selected at the first and second selection camps. The birth dates of those players selected for the team were positively skewed, with the majority of those selected being born in the months January to June. In conclusion, team selectors appear to preferentially select early maturing male ice hockey players who have birth dates early in the selection year.  相似文献   

10.
为了能更充分的了解冰球项目,对冰球的项目特征和运动员的竞技能力构成有一个更充分的认识,从而能够更好的发展冰球运动。通过大量的有关文献和结合多年的教练经验,在总结归纳的基础上分析冰球项目特征,并通过对其属性的深入分析研究冰球运动员竞技能力,从体能、技能、战术、心理能力、智能能力、运动队文化及教练员几个方面进行分析,提出冰球运动项目竞技能力的基本因素、关键因素、主导因素、心理因素、智能因素和团队因素、教练因素,并进一步细化为单兵竞技能力和球队竞技能力,以期推动对冰球运动项目的本质规律进行更加深入的研究,促进冰球运动项目在中国更好更快地发展。  相似文献   

11.
Abstract

Recent literature has related differences in pelvis–trunk coordination to low back pain (LBP) status. In addition, repetitive motions involving bending and twisting have been linked to high incidence of LBP. The purpose of this study was to examine trunk sagittal motion – axial rotation (‘bend and twist’) coordination during locomotion in three groups of runners classified by LBP status (LBP: current low back pain; RES: resolved low back pain and CTR: control group with no history of LBP). Trunk kinematic data were collected as running speed was systematically increased on a treadmill. Within-segment coordination between trunk sagittal and transverse planes of motion (trunk lean and axial rotation, respectively) was calculated using continuous relative phase (CRP), and coordination variability was defined as the between stride cycle standard deviation of CRP (CRPvar). Bend–twist coordination was more in-phase for the LBP group than CTR (p = 0.010) regardless of running speed. No differences in CRPvar were found between the groups. The results from our coordination (CRP) analysis were sensitive to LBP status and suggest that multi-plane interactions of the trunk should be considered in the assessment of LBP. This analysis also has potential for athletically oriented tasks that involve multi-plane interactions of the trunk, particularly ones that contain asymmetric action, such as sweep rowing or a shot on goal in field hockey or ice hockey.  相似文献   

12.
The ability to recognize patterns of play is fundamental to performance in team sports. While typically assumed to be domain-specific, pattern recognition skills may transfer from one sport to another if similarities exist in the perceptual features and their relations and/or the strategies used to encode and retrieve relevant information. A transfer paradigm was employed to compare skilled and less skilled soccer, field hockey and volleyball players' pattern recognition skills. Participants viewed structured and unstructured action sequences from each sport, half of which were randomly represented with clips not previously seen. The task was to identify previously viewed action sequences quickly and accurately. Transfer of pattern recognition skill was dependent on the participant's skill, sport practised, nature of the task and degree of structure. The skilled soccer and hockey players were quicker than the skilled volleyball players at recognizing structured soccer and hockey action sequences. Performance differences were not observed on the structured volleyball trials between the skilled soccer, field hockey and volleyball players. The skilled field hockey and soccer players were able to transfer perceptual information or strategies between their respective sports. The less skilled participants' results were less clear. Implications for domain-specific expertise, transfer and diversity across domains are discussed.  相似文献   

13.
李建民 《冰雪运动》2010,32(5):20-23,28
为冰球攻防战术的发展和创新提供理论上保障,深化现代冰球战术理论研究,形成更为系统和全面的冰球运动战术的理性认识。运用系统论的理论观点与方法,对冰球运动攻防战术系统构成的因素,战术系统的结构和战术系统功能进行分析和认识。认为冰球战术系统是一种动态变化的结构,战术系统的结构决定着战术系统功能的特性;冰球战术系统功能的优化体现在系统因素的优化和系统结构的优化,两者缺一不可。提出优化冰球技战术系统是国内冰球技战术发展的重要方向。  相似文献   

14.
Abstract

The aim of this study was to examine the relationships among biological maturity, physical size, relative age (i.e. birth date), and selection into a male Canadian provincial age-banded ice hockey team. In 2003, 619 male ice hockey players aged 14 – 15 years attended Saskatchewan provincial team selection camps, 281 of whom participated in the present study. Data from 93 age-matched controls were obtained from the Saskatchewan Pediatric Bone Mineral Accrual Study (1991 – 1997). During the initial selection camps, birth dates, heights, sitting heights, and body masses were recorded. Age at peak height velocity, an indicator of biological maturity, was determined in the controls and predicted in the ice hockey players. Data were analysed using one-way analysis of variance, logistic regression, and a Kolmogorov-Smirnov test. The ice hockey players selected for the final team were taller, heavier, and more mature (P < 0.05) than both the unselected players and the age-matched controls. Furthermore, age at peak height velocity predicted (P < 0.05) being selected at the first and second selection camps. The birth dates of those players selected for the team were positively skewed, with the majority of those selected being born in the months January to June. In conclusion, team selectors appear to preferentially select early maturing male ice hockey players who have birth dates early in the selection year.  相似文献   

15.
观看和分析研究本年度世锦赛中国队的实战过程,探索女子冰球进军冬奥会的可行之路。了解和分析世界女子冰球发展趋势,客观看待中国队的优势与存在的问题和寻求克服问题的方法,为未来的发展从理论角度做准备,期待中国女子冰球有更大进步。通过现象看本质,正确分清主观和客观问题产生的原因,宏观问题可以期待,但要有目标,自身努力能解决的问题应该有一个详细的具体方法。训练问题无疑仍是教练员的核心工作,从不同角度和用更丰富的现代思维方式对待存在的问题,也许会找到更好解决问题的方法。中国女子冰球在前进的道路上虽然困难重重,但经过有关人士的共同努力定会绝路逢生,中国女子冰球通向奥运之路的希望是不能放弃的。  相似文献   

16.
陆地冰球运动是冰球运动的延拓,它不受时间、地点和自然条件的影响,是一个全国范围内都可推广和发展的大众群体项目。通过对我国陆地冰球运动现状的研究,探讨了陆地冰球在我国民间发展的潜力和可行性,认为我国应加强对陆地冰球的大力宣传,形成一个以赛促发展的良性循环,培养更多的陆地冰球运动员,转向冰球运动的优秀后备人才,使之成为促进我国冰球运动发展和提高的重要力量。  相似文献   

17.
The ability to recognize patterns of play is fundamental to performance in team sports. While typically assumed to be domain-specific, pattern recognition skills may transfer from one sport to another if similarities exist in the perceptual features and their relations and/or the strategies used to encode and retrieve relevant information. A transfer paradigm was employed to compare skilled and less skilled soccer, field hockey and volleyball players' pattern recognition skills. Participants viewed structured and unstructured action sequences from each sport, half of which were randomly represented with clips not previously seen. The task was to identify previously viewed action sequences quickly and accurately. Transfer of pattern recognition skill was dependent on the participant's skill, sport practised, nature of the task and degree of structure. The skilled soccer and hockey players were quicker than the skilled volleyball players at recognizing structured soccer and hockey action sequences. Performance differences were not observed on the structured volleyball trials between the skilled soccer, field hockey and volleyball players. The skilled field hockey and soccer players were able to transfer perceptual information or strategies between their respective sports. The less skilled participants' results were less clear. Implications for domain-specific expertise, transfer and diversity across domains are discussed.  相似文献   

18.
刘文  胡江 《冰雪运动》2011,33(2):28-30
凝聚力对冰球运动队比赛成绩优劣,以及团队长期可持续发展前景起着重要作用。分析影响冰球项目团队凝聚力的相关因素,是积极构建冰球项目团队凝聚力地基础。冰球队的长远发展目标、比赛任务、领导方式、管理措施与激励机制等构成冰球运动队凝聚力影响的外部环境要素,冰球队内的人员沟通与交流方式、人际关系、运动员的能力表现与运动成绩、冰球队的规模与稳定性、运动员的需求等构成冰球运动队凝聚力影响的内部因素。  相似文献   

19.
The purpose of this study was to examine the interaction of players’ skill level, body strength, and sticks of various construction and stiffness on the performance of the slap and wrist shots in ice hockey. Twenty male and twenty female subjects were tested. Ten of each gender group were considered skilled and ten unskilled. In addition to general strength tests, each subject performed the slap and wrist shots with three stick shafts of different construction and stiffness. Shot mechanics were evaluated by simultaneously recording ground reaction forces from a force plate, stick movement and bending from high speed filming and peak puck velocity from a radar gun. Data were analysed with a 4-way repeated measures ANOVA for several dependent variables including peak puck velocity, peak Z (vertical) force, peak bending and stick to ground angles, peak angular deflection of the shaft, and hand placement on the stick. The results indicated that: 1) the slap shot was much faster than the wrist shot corresponding to greater vertical loading force, stick bending, and greater width of the hand placement; 2) the puck velocity was influenced by skill level and body strength but not stick type; and, 3) that skilled players were able to generate more vertical force and bend of the stick, in part, by adjusting their hand positions on the stick. Further studies are needed to address the specific influence of body strength and skill on the techniques of these shots and in relation to stick material and construction properties.  相似文献   

20.
李民 《冰雪运动》2013,(3):35-38
冰球专业研究生的教育与培养隶属于应用型研究生的培养范畴,对我国冰雪运动项目发展在体育拔尖人才储备方面具有极其重要的现实意义和作用。相对于学术型研究生的教育与培养过程,冰球专业研究生的培养不仅在招生、课程设置、实践环节、导师指导等方面有所差异,同时冰球专业研究生的培养目标与其他专业研究生的培养目标也有本质性的区别。通过对冰球专业研究生教育培养现状的分析,认为研究生教育培养过程中思想道德教育、课程方案设置的合理性及实效性、导师的教学与科研态度、实践环节的考核是影响冰球专业研究生教育与培养的主导性因素,指出提升冰球专业方向研究生思想道德教育理念、注重冰球专业方向研究生培养方案的论证与修缮、提高冰球专业方向研究生导师再学习的能力、完善冰球专业方向实践环节的评估指标等提高我国冰球专业研究生教育与培养水平的具体措施,以期提高和改进现有的冰球专业研究生的教育与培养质量,增强冰球专业研究生的社会竞争力与适应力,为改革冰球专业方向研究生的培养过程提供一定的参考和建议。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号