共查询到20条相似文献，搜索用时 125 毫秒
1.
耐力运动员左心室功能的阻抗心动图研究 总被引：1，自引：0，他引：1
通过阻抗图与心电图、心音图和颈动脉博动图四者同步，对１５名（男９名，女６名）中长跑运动员的左心功能在安静，运动中和力竭三种状态下研究，表明阻抗心动图可以有效地、准确地反映运动员的左心功能。 相似文献
2.
浅析体育课中的情感教学 总被引：1，自引：1，他引：0
体育教学是学生在学习过程中，身体与大脑直接参与的教学活动，它是学生运动能力与思维同步发展的过程。在体育课中进行情感教育，可以培养学生高尚的人格。情感是催化剂，是行为的动因，它能唤起学生对学科的喜爱和向往。培育情感作为学校体育目标中的一个重要内容，须引起广大体育教师的重视。 相似文献
3.
柔韧性是少年儿童田径基础训练的重要内容。在少儿基础训练阶段抓好柔韧性练习，使其与力量、速度、耐力等素质同步发展，可以为今后从事田径专项训练打下良好的基础。通过日常训练实践的探索，我认为提高少年儿童中长跑运动员柔韧性练习效果应该把握好以下几个方面。 相似文献
4.
我国古代皇帝最高司法权的历史成因 总被引：1，自引：0，他引：1
舒红 《徐州教育学院学报》2001,16(1):41-42
本认为我国的古代社会中央集权呈不断加强的趋势，其核心的皇权则同步膨涨。皇权不受任何制度性的约束，可以随意渗入社会生活的一切领域，在司法活动中，皇帝享有最高审判权。其因，一是中国的皇权至上性是由中国经济生活的特点决定的；二是与中国历史的整体进程有关。 相似文献
5.
同步教学法在游泳教学中的运用 总被引：1，自引：0，他引：1
在初级游泳教学中，对2个实验组和2个对照组，42个进行同步教学和传统教学的对比实验，结果表明，同步教学法有利于提高“水感”和教学进度。本研究的目的旨在为游泳教学手段的优化提供参考依据。 相似文献
6.
体育特色小镇与新型城镇化是为满足人民对美好生活的需要、顺应时代发展而产生的新组合、新空间。二者在空间演化、生态意识、功能需求、人文建设方面具有动态耦合特征。研究基于系统论，以系统演化方程对动态耦合的过程进行分析，绘制耦合轨迹，借助逻辑斯蒂曲线对耦合模式进行演化。在此基础上提出了耦合发展的路径：（1）在耦合磨合期，坚持顶层设计与市场协同发展，坚持公益性和共享性原则，坚持体育小镇之“特色”；（2）在耦合契合期，尊重市场规则，注重产业联动效应，政府放权与监管并重，保障体育特色小镇建设与新型城镇化的可持续发展。 相似文献
7.
张国生 《西安体育学院学报》1994,(3)
为了探索足球技术量化教学的有益途径，从根本上解决足背正面踢球技术动作的关键环节和完成技术动作的难点．作者研制了电子同步反馈器．该电子同步反馈器经过多反复试验成功后，正试将其用足背正面踢球技术的教学中，经过教学实验和验证性教学实验，效果非常显著．本电子同步反馈器在体育院系初学足球的本科生中进行对比教学实验（此外．对足球专业运动员也进行了试验），经统计学检验Ｐ＜０．００１． 相似文献
8.
青少年在比赛中的技战术水平的发挥与心理素质有着密切关系，教练员总习惯于在运动员的心理上进行分析。但是心理素质培养是一个综合的、复杂的过程，不是通过单一模式的训练就可以提高的。我们常说“艺高人胆大”，出色的技术实力可以很大程度地增强运动员的自信心。针对年轻运动员，技术训练和综合素质的同步提高才是重点。 相似文献
9.
10.
上次我们简单介绍了正手攻球的技术动作和基本要领。初学者在学习正手攻球的过程中，不仅仅是要掌握一项技术动作，更重要的是在练习正手攻球的过程中，体会击球点的概念，体会重心交换的感觉，要掌握转腰、收前臂，找到腰手合一的感觉。
在不同的击球点击球，其技术动作是不同的，比如在高点击球，发力方向更为向前；而在低点击球，发力方向要更为向上。此外，在正手攻球时，转腰和收缩前臂几乎是同步的动作，不要前后脱节，要在收缩前臂的过程中去击球，击球之后要迅速还原，养成连续击球的习惯。在训练方法上，多球训练可以更好地巩固技术动作，同时也可以通过多球来练习步法。 相似文献
11.
运用激光测速系统、运动学分析系统以及多参数同步触发系统,在上海2名优秀短跑运动员的100 m跑训练过程中进行测试,将运动员100 m途中跑支撑阶段的运动学参数与人体运动的水平速度进行同步分析,来揭示短跑运动员100 m途中跑速度的变化规律,讨论和分析短跑运动员100 m途中跑支撑阶段的不同运动学参数的变化与人体速度的关系,为教练员和运动员提高短跑途中跑的速度和改进技术动作提供一定的数据参考和理论依据。 相似文献
12.
Performer autonomy has been shown to contribute to effective motor performance and learning. Autonomy support is therefore a key factor in the OPTIMAL theory of motor learning (Wulf, G., & Lewthwaite, 2016). The purpose of the present study was to examine whether supporting individuals’ need for autonomy by giving them choices would increase movement efficiency. Such a finding would be consistent with the OPTIMAL theory prediction that autonomy facilitates the coupling of goals and actions. Participants (N = 32) were asked to run at a submaximal intensity (65% of VO2 max) for 20 minutes. Before the run, participants in a choice group were able to choose 5 of 10 photos as well as the order in which they would be shown to them on a computer screen during the run. Control group participants were shown the same photos, in the same order, chosen by their counterparts in the choice group. Throughout the run, oxygen consumption and heart rate were significantly lower in the choice group than the control group. Thus, providing autonomy support resulted in enhanced running efficiency. The present findings are in line with the notion that autonomy facilitates goal-action coupling. 相似文献
13.
The aims ofthe present study were to assess running economy in track runners and orienteers and to identify the factors responsible for any differences. The participants were 11 orienteers and 10 track runners of similar age, body mass, maximal oxygen uptake and training background. However, the orienteers included heavy terrain running in their daily training, whereas the track runners ran almost entirely on the roads and tracks. Maximal oxygen uptake and running economy were calculated during horizontal path running and during cross-country running in rough terrain with steep hills, using a telemetric system (K2, Cosmed, Italy). Running economy during path running was 217 +/- 12 and 212 +/- 14 ml.kg -1 .km -1 (mean +/- s) in the orienteers and the track runners, respectively. Running economy was impaired by 41-52% in heavy terrain (P ? 0.05), and was less pronounced in the orienteers than in the track runners (88 +/- 18 vs 109 +/- 26 ml.kg -1 .km -1 ; P ? 0.05). In conclusion, the better running economy of orienteers when changing from horizontal path to heavy terrain running could be an innate ability, or it could be speculated that specific training may improve running economy, indicating the importance of specific training for orienteers. 相似文献
14.
The aims of the present study were to assess running economy in track runners and orienteers and to identify the factors responsible for any differences. The participants were 11 orienteers and 10 track runners of similar age, body mass, maximal oxygen uptake and training background. However, the orienteers included heavy terrain running in their daily training, whereas the track runners ran almost entirely on the roads and tracks. Maximal oxygen uptake and running economy were calculated during horizontal path running and during cross-country running in rough terrain with steep hills, using a telemetric system (K2, Cosmed, Italy). Running economy during path running was 217+/-12 and 212+/-14 ml x kg(-1) x km(-1) (mean +/- s) in the orienteers and the track runners, respectively. Running economy was impaired by 41-52% in heavy terrain (P < 0.05), and was less pronounced in the orienteers than in the track runners (88+/-18 vs 109+/-26 ml x kg(-1) x km(-1); P < 0.05). In conclusion, the better running economy of orienteers when changing from horizontal path to heavy terrain running could be an innate ability, or it could be speculated that specific training may improve running economy, indicating the importance of specific training for orienteers. 相似文献
15.
Achievement goal theory and the expectancy-value model of achievement choice were used to examine fourth-grade students' motivational changes in an elementary physical education running program. In fall and spring of the school year, participants (N = 113; 66 boys, 47 girls) completed questionnaires assessing achievement goals, expectancy beliefs, subjective task values, and intention for future running participation. They also completed a timed 1-mile (1.6 km) run. The number of laps they ran/walked during the school year was used to assess students' persistence/effort. Results indicated the students improved their run but became less motivated about running while participating in a year-long running program. Children's beliefs about how good they were in the running program (i.e., expectancy beliefs) and their perceptions of how interesting and fun it was (i.e., interest) emerged as the strongest positive predictors of their motivation for running over time. These findings provide strong empirical evidence that expectancy beliefs and interest are essential to children's motivation in elementary physical education. 相似文献
16.
Tomoya Takabayashi Mutsuaki Edama Erika Yokoyama Chiaki Kanaya Masayoshi Kubo 《Sports biomechanics / International Society of Biomechanics in Sports》2018,17(1):18-32
Because previous studies have suggested that there is a relationship between injury risk and inter-segment coordination, quantifying coordination between the segments is essential. Even though the midfoot and forefoot segments play important roles in dynamic tasks, previous studies have mostly focused on coordination between the shank and rearfoot segments. This study aimed to quantify coordination among rearfoot, midfoot, and forefoot segments during running. Eleven healthy young men ran on a treadmill. The coupling angle, representing inter-segment coordination, was calculated using a modified vector coding technique. The coupling angle was categorised into four coordination patterns. During the absorption phase, rearfoot–midfoot coordination in the frontal planes was mostly in-phase (rearfoot and midfoot eversion with similar amplitudes). The present study found that the eversion of the midfoot with respect to the rearfoot was comparable in magnitude to the eversion of the rearfoot with respect to the shank. A previous study has suggested that disruption of the coordination between the internal rotation of the shank and eversion of the rearfoot leads to running injuries such as anterior knee pain. Thus, these data might be used in the future to compare to individuals with foot deformities or running injuries. 相似文献
17.
Boisnoir A Decker L Reine B Natta F 《Sports biomechanics / International Society of Biomechanics in Sports》2007,6(2):215-223
Biomechanical analyses using synchronized tools [electromyography (EMG), motion capture, force sensors, force platform, and digital camera] are classically performed in a laboratory environment that could influence the performance. We present a system for studying the running sprint start that synchronizes motion capture, EMG, and ground reaction force data. To maximize motion capture (Vicon 612 with six cameras), a special dim environment was created in the stadium. "Classical" tools were combined with "purpose-built" tools intended to analyse the different aspects of movement. For example, a synchronization system was built to create a common time-base for all data recordings and a portable EMG system was synchronized by a cable that was "disconnected" by the athlete's movement out of the blocks. This disconnection represented an independent event recorded by different tools. A "gap" was measured for some sprint start events between kinetic and kinematic (motion capture) data. Calibration results, measurements of time "gap", and duration of the independent event were used to validate the accuracy of motion capture and the synchronization system. The results validate the entire experimental set-up and suggest adjustment values for motion capture data. This environment can be used to study other movements and can easily be applied to several sports. 相似文献
18.
目的观察爬梯与跑台两种不同运动方式对小鼠骨骼肌中细胞凋亡调控基因的影响。方法将实验小鼠分为安静对照组(YC)、爬梯运动组(YR)和跑台运动组(YE),采用实时荧光定量PCR的方法,分别对各组腓肠肌中凋亡调控基因(ARC、Bc l-2、Bax、HSP70、X IAP)及Caspase-3基因进行检测。结果 (1)与YC组相比,YR组ARC和HSP70 mRNA水平均显著上调(P<0.05),而Bax和Caspase-3 mRNA水平显著下调(P<0.05);(2)与YC组相比,YE组Bc l-2、HSP70和X IAP mRNA水平均显著上调(P<0.05),而ARC和Bax mRNA水平均显著下调(P<0.05)。结论爬梯和跑台运动均可干预凋亡调控基因而弱化骨骼肌细胞凋亡的潜能。 相似文献
19.
A number of studies have shown that attentional focus instructions can effect running economy. This study assessed spiroergometry, as well as running kinematics as a possible mechanism to explain these effects. Twelve runners had to focus their attention on either their running movement, their breathing or on a video while running on a treadmill at a set, submaximum speed. Spiroergometry and running kinematics were measured. Results revealed worse running economy in both internal focus conditions (breathing and movement) compared to the external focus condition (video), replicating previous findings. In addition, vertical oscillation during the running movement was elevated in the movement compared to the video condition, indicating a less efficient running style. No changes in kinematics were found for the breathing compared to the video condition. Therefore, consciously focusing on the running movement moves runners away from their optimised running pattern and leads to detriments in economy. The decreases in running economy in the breathing condition can be better explained by changes in breathing patterns. 相似文献
20.
整合休闲涉入理论、心理资本理论、流畅体验理论等,检验心理资本—流畅体验的链式中介效应,在此基础上构建链式中介效应模型。采用成熟量表自编问卷,对305名跑步参与者进行调查。结果显示：跑步参与者涉入程度、心理资本、流畅体验均是跑步参与者幸福感的前因变量。三者对幸福感的直接影响均达显著水平（P<0.005）,跑步参与者涉入通过心理资本和流畅体验的中介作用对幸福感产生影响,且该中介作用包含3条路径,即心理资本与流畅体验各自产生的间接效应,以及二者共同产生的链式中介效应。研究揭示了跑步参与者涉入程度与其幸福感的关系及作用机制,深化了跑步参与者涉入对参与者自身影响的研究。 相似文献