A knock to the system: A new sociotechnical systems approach to sport-related concussion     

Amanda Clacy  Natassia Goode  Rachael Sharman  Geoff P. Lovell  Paul M. Salmon 《Journal of sports sciences》2017,35(22):2232-2239

Broader contextual factors that influence concussion management have tended to be overlooked. To address this, the present study used a sociotechnical systems approach to identify perceived responsibilities and applied strategies for three domains of concussion management (i.e., prevention, identification and treatment). Participants were 118 members of the community rugby union system in Australia (69.2% male). Participants from throughout the rugby system (e.g., players, parents, coaches, club management) were asked open-ended questions about their perceived responsibilities and the strategies they use for concussion management. It was found that (a) proper training, technique correction and education were recurrent prevention themes; (b) the majority of key stakeholders felt that they could consistently identify concussion; however, medical aids (medics) were the only system actors who stated a responsibility to use standardised concussion assessment measures and (c) less than one third of the respondents indicated their involvement in treating concussion. This study identifies specific junctures in the system that prevents effective concussion management strategies. A sociotechnical systems approach improves the understanding of concussion prevention, and management beliefs and behaviours.  相似文献   

优秀女子足球运动员间歇性恢复能力的评价研究     

秦旸  张娜 《南京体育学院学报(社会科学版)》2016,(2):103-107

目的：：探讨运用限定级数YO-YO IR2测试以及心率恢复速率评价我国优秀女足运动员的间歇恢复能力。方法：运用测试法对2013年冬训期间的10名国家女足运动员进行YO-YO IR2测试、心率监控以及比赛监测，采集运动员测试跑动距离、心率特征以及比赛中高强度跑动距离，进行统计学分析。结论：女足运动员YO-YO IR2测试结果以及心率恢复速率与比赛中的高强度跑动能力具有紧密相关性，提示YO-YO IR2测试以及心率监控可以作为评价女足运动员间歇性恢复能力的有效方法。与传统的力竭性YO-YO IR2测试法相比，采用限定级数的YO-YO IR2测试后的心率恢复速率评价更易于女足运动员接受，在训练中具有更好的适用性。  相似文献   

Thermoneutral immersion exercise accelerates heart rate recovery: A potential novel training modality     

Mauricio Garzon  Olivier Dupuy  Laurent Bosquet  Anil Nigam  Alain Steve Comtois  Martin Juneau 《European Journal of Sport Science》2017,17(3):310-316

This study compared heart rate recovery (HRR) after incremental maximal exercise performed at the same external power output (P_ext) on dry land ergocycle (DE) vs. immersible ergocycle (IE). Fifteen young healthy participants (30?±?7 years, 13 men and 2 women) performed incremental maximal exercise tests on DE and on IE. The initial P_ext on DE was 25?W and was increased by 25?W/min at a pedalling cadence between 60 and 80?rpm, while during IE immersion at chest level in thermoneutral water (30°C), the initial P_ext deployment was at a cadence of 40?rpm which was increased by 10?rpm until 70?rpm and thereafter by 5?rpm until exhaustion. Gas exchange and heart rate (HR) were measured continuously during exercise and recovery for 5?min. Maximal HR (DE: 176?±?15 vs. IE 169?±?12?bpm) reached by the subjects in the two conditions did not differ (P?>?.05). Parasympathetic reactivation parameters (ΔHR from 10 to 300?s) were compared during the DE and IE HR recovery recordings. During the IE recovery, parasympathetic reactivation in the early phase was more predominant (HRR at Δ10–Δ60?s, P?<?.05), but similar in the late phase (HRR at Δ120–Δ300?s, P?>?.05) when compared to the DE condition. In conclusion, incremental maximal IE exercise at chest level immersion in thermoneutral water accelerates the early phase parasympathetic reactivation compared to DE in healthy young participants.  相似文献   

基于DBN模型与Kinect数据的高尔夫挥杆重建     

吕东岳  黄志蓓  陶冠宏  俞能海  吴健康 《中国科学院大学学报》2016,33(2):204-212

人们对高尔夫运动的兴趣在过去的10年间爆发式增长,同时高尔夫球员的数量也显著增加.因此,如何训练一个球员做出适当和准确的挥杆动作已经引起研究者的广泛关注.在此类研究中最重要的步骤是挥杆动作的捕获与重建.至今为止,以Kinect为代表的深度成像设备受其基础条件的限制,其捕获的挥杆运动可能会由于运动中肢体之间的互相遮挡与肢体识别时产生的混乱丧失足够的精确度.为了从肢体互相遮挡并且分辨率较低的深度图像信息中恢复比较精确的运动信息,该文提出一个用于描述人体关节点之间空间关系与关节点动态特性的动态贝叶斯网络(DBN)模型,并基于该模型实现了高尔夫挥杆动作的重建.实验结果表明,该算法能够实现重建精度媲美商用的光学运动捕获系统(OMocap),并且比现有的深度信息修改算法具有更好的性能.  相似文献   

普通高校体育课对大学生心肺功能影响的实验研究          下载免费PDF全文

高谊 《河北体育学院学报》2016,30(4):42-47

运用文献资料法、教学实验法和数理统计法,就高校体育课对大学生心肺功能的影响进行实验研究.结果显示:体育课能有效改善大学生的心肺功能;情感策略教学方法对大学生的心功能改善具有明显的促进作用,对肺功能FVC、FEV1.0、MVV等指标也有一定程度的提高作用,虽然不具显著性,但比传统教学方法仍显示出较大的优势.建议高校体育教学改革要以“促进青少年身心健康、体魄强健”为方向,以提高大学生体质健康水平为基础目标,创新教学模式和方法,不断优化教学效果.  相似文献   

体育产业高质量发展系统动力机制模型建构与现实考察     

薛昭铭  刘东升  马德浩 《沈阳体育学院学报》2020,(2):116-124

通过文献资料法和案例分析法,以系统论为视角对体育产业高质量发展进行动力机制模型建构,并以江苏体育产业发展经验作为现实考察。研究认为:体育产业高质量发展作为政策性议题,其实践取向应围绕产业的商业性效益逻辑和体育的人文性功能价值进行有机融合,进而推动体育产业在社会主要矛盾、资源配置方式、产业结构模式、经济增长状态4个维度中积极寻求转向。推进体育产业转向高质量发展是一个系统问题,系统运转的关键在于形成运动项目内涵丰富的内生机制、社会进步和经济发展环境的外发机制以及业态载体和空间载体充沛的内外联动机制。当前运动项目产业化内在张力不足、外部环境要素缺位、空间载体培育良莠不齐是现实挑战。提出注重深度内涵式发展、强化务实载体建设、营造适宜外部环境3个由意识理念引领到具体工作抓手的发展思路。  相似文献   

我国体育用品制造业国际转移的趋势及动力机制——基于全球生产网络视角     

朱华友  李涵  戴艳 《武汉体育学院学报》2019,53(8):44-49

我国体育用品制造业国际转移呈现出网络化、多元化、集群化、主动化的新趋势，其动力来源有三点，一是寻求我国体育用品制造业价值链的重构，二是试图跨越后发国家可能面临的价值链固化的"网络陷阱"，三是追逐包括竞争优势和网络权力等隐形收益在内的综合利益最大化。但是，这种自觉行动和主动作为可能受到价值链上端发达国家的阻击。因此，我国体育用品制造业要利用研发设计和品牌营销价值链的发育突破门限效应，积极开展跨境并购和逆向投资活动弥补比较劣势，并逐步回归到研发本土化，利用国内中小体育用品企业构建由自己主导的价值链，以全球布局应对潜在的贸易风险。  相似文献   

1995-2014年羌族中小学生体质健康发展态势研究*     

张晓林 《广州体育学院学报》2017,37(5):75-79

依据全国学生体质与健康调研报告并结合实地调查,采用文献资料法、逻辑分析法、数据统计法和对比研究法,分别对1995~2014年间羌族7-17岁中小学生的身高、体重、胸围、肺活量、50m跑、坐位体前屈六项共性指标进行数据统计分析.结果表明:羌族中小学生身体形态发育水平总体趋势不断提升,身体素质和身体机能下降幅度有所减缓,羌族中小学生整体体质健康状况不容乐观.建议严格实施体质健康监测年度报告制度;构建"社会、学校、家庭"三位一体互动式学生体质健康促进模式;多元协同治理促进学生养成健康的生活方式、良好的体育锻炼习惯;改革供给方式加大对羌、汉族经济落后地区的体育经济投入,完善体育设施、设备等.  相似文献   

Exploring Verbal,Visual and Schematic Learners' Static and Dynamic Mental Images of Scientific Species and Processes in Relation to Their Spatial Ability     

Sulaiman M. Al-Balushi 《International Journal of Science Education》2013,35(3):460-489

The current study compared different learners’ static and dynamic mental images of unseen scientific species and processes in relation to their spatial ability. Learners were classified into verbal, visual and schematic. Dynamic images were classified into: appearing/disappearing, linear-movement, and rotation. Two types of scientific entities and their related processes were investigated: astronomical and microscopic. The sample included 79 female students from Grades 9 and 10. For the purpose of the study, three instruments were used. The Mental Images by Guided Imagery instrument was designed to investigate participants' visualization of static and dynamic mental images. The Water-Level Task was adopted to estimate participants' spatial ability. The Learning Styles Inventory was used to classify participants into verbal, visual and schematic learners. The research findings suggest that schematic learners outperformed verbal and visual learners in their spatial ability. They also outperformed them in their vividness of microscopic images; both micro-static and micro-dynamic images; especially in the case of appearing/disappearing images. The differences were not significant in the case of astronomical images. The results also indicate that appearing/disappearing images received the least vividness scores for all three types of learners.  相似文献   

Objective and subjective methods for quantifying training load in wheelchair basketball small-sided games     

Aitor Iturricastillo  Cristina Granados  Asier Los Arcos  Javier Yanci 《Journal of sports sciences》2017,35(8):749-755

The aim of the present study was to analyse the training load in wheelchair basketball small-sided games and determine the relationship between heart rate (HR)-based training load and perceived exertion (RPE)-based training load methods among small-sided games bouts. HR-based measurements of training load included Edwards’ training load and Stagno’s training impulses (TRIMP_MOD) while RPE-based training load measurements included cardiopulmonary (session RPEres) and muscular (session RPEmus) values. Data were collected from 12 wheelchair basketball players during five consecutive weeks. The total load for the small-sided games sessions was 67.5 ± 6.7 and 55.3 ± 12.5 AU in HR-based training load (Edwards’ training load and TRIMP_MOD), while the RPE-based training loads were 99.3 ± 26.9 (session RPEres) and 100.8 ± 31.2 AU (session RPEmus). Bout-to-bout analysis identified greater session RPEmus in the third [P < 0.05; effect size (ES) = 0.66, moderate] and fourth bouts (P < 0.05; ES = 0.64, moderate) than in the first bout, but other measures did not differ. Mean correlations indicated a trivial and small relationship among HR-based and RPE-based training loads. It is suggested that HR-based and RPE-based training loads provide different information, but these two methods could be complementary because one method could help us to understand the limitations of the other.  相似文献