共查询到20条相似文献，搜索用时 15 毫秒
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《European Journal of Sport Science》2013,13(3):159-167
Abstract Rock climbing is a popular adventure sport for which there is a growing body of scientific knowledge. There is, however, a lack of sport-specific assessment tools to monitor performance. The aim of this study was to examine the potential of the rock-over climbing test (ROCT) as a measure of climbing performance. The ROCT was conducted on a climbaflex board and involved the climber making a rock-over move for which the height gained from lower to upper handhold was measured. Results indicated there was a significant relationship between scaled (to the height of the climber) ROCT scores and climbing ability (r=0.67, P<0.0005). Regression modelling revealed that the ROCT explained 45% of the variance in scores between climbers. The ROCT differentiated between climber ability levels. Mean ROCT scores for novice, intermediate, advanced, and elite climbers were 59.5%, 71%, 82%, and 90% of participant height respectively. Results of analysis of variance revealed that these differences were significant (F 3,42=13.38, P<0.0005). Limits of agreement and intra-class correlation indicated that the ROCT is a reliable performance measure. Our findings suggest that the ROCT is a useful measure of climbing performance. 相似文献
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AbstractThis paper documents the process of utilizing Twitter for a doctoral dissertation in rugby governance, and highlights the key benefits of using Twitter as a research tool. Research followed a case study approach to delve into the four major uses of Twitter: (1) a warning system for dramas or incidents relating to one’s research field; (2) data collection; (3) finding and recruiting research subjects; and (4) building a personal research brand. The research design used a mixed method approach that combined qualitative and quantitative analysis methods. The findings serve as the basis for the pursuit of more detailed future research with Twitter as the principal medium in focus within the area of sport. 相似文献
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Lewis MJ 《Journal of sports sciences》2003,21(10):793-802
Biomagnetometry is a non-invasive technique for detecting magnetic fields associated with the electrophysiology and magnetic susceptibility of body tissues. The aims of this paper are to provide a review of the discipline of biomagnetism and its measurement using a superconducting quantum interference device (SQUID), and to discuss the potential utility of this technique in sport and exercise science. A tutorial section is presented to provide an introduction to the theory and practical application of SQUID biomagnetometry. A review of the biomagnetism literature demonstrates the variety of previous biomagnetic investigations and suggests several potential applications of biomagnetometry in sport and exercise science. A discussion of these includes an assessment of the advantages of measuring biomagnetic fields as opposed to electrical potentials, with particular reference to the improved precision and accuracy of physiological source modelling using biomagnetic data. There is evidence to suggest that SQUID biomagnetometry would provide useful (and perhaps unique) information on functional, anatomical and physiological assessments in sport and exercise science. Further investigations of biomagnetometry in this discipline should focus on three main areas: cardiology, encephalography and neurology, and body composition assessment. 相似文献
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This study evaluated the feasibility of cardiodynamicsgram (CDG) for monitoring the cardiac functions of athletes and exercisers. CDG could provide an effective, simple, and economical tool for exercise training. Seventeen middle-distance race athletes aged 14–28 years old were recruited. CDG tests and blood test including creatine kinase (CK), CK-MB isoenzyme, and high-sensitivity troponin I (hsTnI) were performed before a high-intensity prolonged training, as well as 2 and 14 h after training, respectively. The CDG test result was unsatisfactory when the CK test result was used as standard. However, the accuracy of CDG test was about 80% when CK-MB and hsTnI were used as standards. Thus, CDG offers a noninvasive, simple, and economical approach for monitoring the cardiac function of athletes and exercisers during exercise training. Nonetheless, the applicability of CDG needs further investigation. 相似文献
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Scott B. Williams Paul B. Gastin Anna E. Saw Sam Robertson 《European Journal of Sport Science》2018,18(4):458-472
Athletes often record details of their training and competitions, supported by information such as environmental conditions, travel, as well as how they felt. However, it is not known how prevalent these practices are in golfers, or how valuable this process is perceived. The purpose of this study was to develop a golf-specific load monitoring tool (GLMT), and establish the content validity and feasibility of this tool amongst high-level golfers. In the first phase of development, 21 experts were surveyed to determine the suitability of items for inclusion in the GLMT. Of the 36 items, 21 received >78% agreement, a requirement to establish content validity and for inclusion in the GLMT. Total duration was the preferred metric for golf-specific activities, whilst rating of perceived exertion (RPE) was preferred for measuring physical training. In the second phase, feasibility of the tool was assessed by surveying 13 high-level male golfers following 28-days of daily GLMT use. All items included in the GLMT were deemed feasible to record, with all players participating in the feasibility study providing high to very high ratings. Golfers responded that they would consider using a load monitoring tool of this nature long term, provided it can be completed in less than five minutes per day. 相似文献
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《European Journal of Sport Science》2013,13(7):893-901
AbstractThe capturing of movements by means of wearable sensors has become increasingly popular in order to obtain sport performance measures during training or competition. The purpose of the current study was to investigate the feasibility of using body worn accelerometers to identify previous highlighted performance related biomechanical changes in terms of substantial differences across skill levels and skating phases. Twenty-two ice hockey players of different caliber were equipped with two 3D accelerometers, located on the skate and the waist, as they performed 30 m forward skating sprints on an ice rink. Two measures of the temporal stride characteristics (contact time and stride time) and one measure of the propulsive power (stride propulsion) of a skating stride were calculated and checked for discriminating effects across (i) skill levels and (ii) sprint phases as well as for their (iii) strength of association with the sprint performance (total sprint time). High caliber players showed an increased stride propulsion (+22%, P?<?0.05) and shorter contact time (?5%, P?<?0.05). All three analysed variables highlighted substantial biomechanical differences between the accelerative and constant velocity phases (P?<?0.05). Stride propulsion of acceleration strides primarily correlated to total sprint time (r?=??0.57, P?<?0.05). The results demonstrate the potential of accelerometers to assess skating technique elements such as contact time or elements characterizing the propulsive power such as center of mass acceleration, to gauge skating performance. Thus, the findings of this study might contribute to establishing wearable sensors for in-field ice hockey skating performance analysis. 相似文献
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促进体育教师专业发展的新工具——教育博客 总被引：1，自引：1，他引：0
教育博客的出现为体育教师专业发展提供了一个全新的平台.从教育博客以及教师专业发展的概念入手,对教育博客促进体育教师专业发展的优势、途径以及局限性等方面进行了分析.教育博客因其技术的人性化特征使得体育教师们都很乐意接受,积极将其做为自己行动研究的电子载体,并在情感上满足体育教师的自我宣泄和认同感.为教师的专业发展提供了更多且有效的机会,对推动体育教师专业发展提供了帮助. 相似文献
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基于政策工具视角,从政策工具维度和校园足球发展要素维度出发,对校园足球政策工具进行量化分析。发现我国校园足球政策工具选择的特征及存在问题包括:权威工具使用过多,“要求”“指示指导”运用尤为频繁;能力建设工具和象征与劝诫工具的应用不足;激励工具、自愿性工具与系统变革工具运用缺位。提出我国校园足球政策工具选择的优化策略:应优化校园足球政策工具类型结构,灵活发挥多重工具效能;积极创新和采用新工具,避免过度使用权威工具;增加能力建设工具和象征与劝诫工具在各政策领域的使用强度;积极引入激励工具和自愿性工具,推进“政府主导,多元参与”模式。 相似文献
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速滑计圈器的键盘输入设计方案 总被引：4，自引：4，他引：0
单片机扩展键盘输入的设计方案比较多,一般解决方法是利用输入输出的扩展芯片,或者是利用串行输入输出芯片来扩展I/O口。为了减小速滑计圈器印刷电路板的面积、减少键盘的数量、提高键盘的多重功能。课题组利用单片机的寻址功能,把键盘设置成2种功能,寻址位为0时键盘处在圈数的设置状态;寻址位为1时键盘处在加1、减1、恢复原设置圈或重新设置圈等操作状态。 相似文献
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近20年来,国内外撑竿跳高的研究以男子撑竿跳高技术为主,特别是以前苏联撑竿跳高技术为主要研究对象;国内外专家对撑竿跳高技术的运动生物力学原理及各技术环节都进行了较为详细的研究,包括对女子撑竿跳高技术的研究,我国对女子撑竿跳高技术的研究还不够系统,相比而言,国外专家在这方面的研究较为深入详实。 相似文献
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Deborah P. Vossen 《体育哲学杂志》2016,43(2):251-265
Via the existential questioning outlook supplied by the Grasshopper’s three visions as relevant to the fate of humankind – oblivion, delusion, and really magnificent games – this article seeks to alleviate some of the ambiguity surrounding Bernard Suits’ provocative claim that Utopian existence is fundamentally concerned with game-playing. Specifically, after proposing an interpretation of Suits’ parable designed to enrich the logical intelligibility of his Utopian thesis, I advance the suggestion that the Grasshopper’s picture of people playing really magnificent games is reasonably interpreted as a clue that the philosopher’s quest to discern games worthy of a Utopian might very well be that which saves humanity from the desolate oblivion-delusion paradox erected as a consequence of the initial two visions. 相似文献
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粉粉春意
浅谈的颜色最适合莺黄柳绿的春日，Prince粉红色女士网球上衣，粉白相间的设计完美衬托肤色，令肌肤在春日阳光的照耀下愈加耀目。面料提供了良好的抗紫外线保护和良好的吸湿性，干爽的质地令透气效果更佳。舒适的表面能让皮肤轻松一整天，再多运动量也能始终保持美丽自然。 相似文献
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DotA这款游戏能够在全世界,特别是中国如此风靡,这与DotA当前版本的作者IceFrog的辛勤付出有着必然关系。但是拥有数以万计粉丝的IceFrog,一向都是以低调示人。网络上,游戏里,真实生活中,几乎都没有任何关于IceFrog的新闻,这位一直为DotA默默奉献的幕后英雄,他的故事,他的容貌,甚至他的兴趣爱好,已经成为了全球DotA爱好者最关心的事情。随着第二届DOTA2国际邀请赛的全面开战,已经成为Valve一员的IceFrog尽管保持着一致的低调,没有接受任何媒体的采访,更没有让外界知道自己的庐山真面目,不过《电子竞技》杂志还是通过多多方调查采访,为读者带来最新最全关于IceFrog的独家内容。最有意思的是,《电子竞技》杂志记者在询问IceFrog怎么评价这次比赛的时候,IceFrog只是简单一句:"大家开心就好。" 相似文献
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Mary Ann Roberton Gregory Thompson Stephen J. Langendorfer 《Physical Education & Sport Pedagogy》2017,22(2):187-196
Background: Valid motor development sequences show the various behaviors that children display as they progress toward competence in specific motor skills. Teachers can use these sequences to observe informally or formally assess their students. While longitudinal study is ultimately required to validate developmental sequences, there are earlier, pre-longitudinal steps that can be used to screen hypothesized sequences to see if they are worthy of the time and expense of longitudinal study. These same steps can also provide teachers with preliminary tools for observation/assessment. Purpose: At the request of physical educators in a midwestern suburb in the United States, the investigators screened developmental sequences for the action of arms and legs in self-turned rope jumping. The goal was to create a preliminary assessment tool that could be used in physical education classes. Participants: The physical educators took videos of 216 children attempting to jump rope. The children were 5–10 years of age. Data analysis: The investigators categorized the videos using the hypothesized developmental sequences as a checklist. The incidence of each level in the sequences was then graphed to see if the percentages of occurrence rose and fell across age as would be expected if the levels were developmentally valid. The investigators also looked at whether children who varied their behavior across trials varied only to adjacent levels in the sequences. Results: Results indicated that one hypothesized arm category was not developmental, and two leg categories needed further study in younger children. Based on these results, the investigators modified the proposed sequences and provided decision rules so teachers could use them as preliminary observation/assessment tools. 相似文献
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美国开发的基于课堂观察的体育教师效能评价工具表现出两方面特性:一方面基于教育和评价理论,建立评价指标和评价流程,严格保证评价者资质,不断优化评价工具的信度和效度;另一方面通过实证研究识别体育教师有效课堂教学行为,为教师教学质量的诊断和改进提供重要参考。未来我国应从研发本土化评价工具、培养专业化评价人员、遵循规范性评价流程及建立互动型反馈机制4个方面优化体育教师效能评价的质量。 相似文献