运动性疲劳的细胞机制及研究进展   总被引：18，自引：0，他引：18  

侯春丽  闫守扶  孙红梅 《首都体育学院学报》2003,15(1):89-92

运动性疲劳是一个十分复杂的过程，并受到多种因素的影响，迄今为止人们对其产生的机理仍未达成一致的看法。本文就运动性疲劳的机制问题对近几年来研究的热点及最新进展情况试作阐述。  相似文献   

一氧化氮与运动疲劳关系的研究进展   总被引：5，自引：0，他引：5  

熊正英  曲洪刚 《福建体育科技》2004,23(2):17-19

一氧化氮(NO)是一种自由基,也是一种重要的细胞内信使分子,其参与许多生理过程,具有广泛的生物学效应。本文主要从NO对肌肉的外周机制和大脑的中枢机制两方面对运动性疲劳进行阐述,探讨了NO与运动性中枢疲劳的关系,并展望了其在消除运动性疲劳的意义。  相似文献   

体外反搏对运动员血流动力学影响的研究     

郑岩岚 《浙江体育科学》1995,(3)

１２名游泳运动员，配对后随机分成实验组和对照组，实验组每人进行２周共１０次体外反搏，于反搏前、反搏后即刻和２周后测定血流动力学指标，同时对与之配对的对照组队员进行测定。结果表明：体外反搏后即刻心输出量增加，左心室有效泵力提高，体循环外周阻力下降，微循环状态改善；进行两周反搏后的第二天，上述良好变化继续存在，而对照组各项指标前后变化不大，提示体外反搏对提高运动员心功能，改善血循环状况从而增加重要器官的血液供应，加速代谢产物的排泄方面有良好的作用。  相似文献   

A novel sleep optimisation programme to improve athletes’ well-being and performance     

Emer Van Ryswyk  Richard Weeks  Laura Bandick  Michaela O’Keefe  Andrew Vakulin  Peter Catcheside 《European Journal of Sport Science》2017,17(2):144-151

Objectives: To improve well-being and performance indicators in a group of Australian Football League (AFL) players via a six-week sleep optimisation programme. Design: Prospective intervention study following observations suggestive of reduced sleep and excessive daytime sleepiness in an AFL group. Methods: Athletes from the Adelaide Football Club were invited to participate if they had played AFL senior-level football for 1–5 years, or if they had excessive daytime sleepiness (Epworth Sleepiness Scale [ESS] >10), measured via ESS. An initial education session explained normal sleep needs, and how to achieve increased sleep duration and quality. Participants (n?=?25) received ongoing feedback on their sleep, and a mid-programme education and feedback session. Sleep duration, quality and related outcomes were measured during week one and at the conclusion of the six-week intervention period using sleep diaries, actigraphy, ESS, Pittsburgh Sleep Quality Index, Profile of Mood States, Training Distress Scale, Perceived Stress Scale and the Psychomotor Vigilance Task. Results: Sleep diaries demonstrated an increase in total sleep time of approximately 20?min (498.8?±?53.8 to 518.7?±?34.3; p?<?.05) and a 2% increase in sleep efficiency (p?<?0.05). There was a corresponding increase in vigour (p?<?0.001) and decrease in fatigue (p?<?0.05). Conclusions: Improvements in measures of sleep efficiency, fatigue and vigour indicate that a sleep optimisation programme may improve athletes’ well-being. More research is required into the effects of sleep optimisation on athletic performance.  相似文献   

An intervention in the Halliwick Method procedures (swimming) for a group of individuals with Downs syndrome     

D. Kokaridas  N. Aggelopoulou-Sakadami  B. Walters 《欧洲特需教育杂志》2013,28(2):218-231

The purpose of this study was to intervene in the process of the Halliwick Method (swimming), in order to improve the method, or some of its aspects, for a sample of 14 individuals with Downs syndrome (aged six to 21 years), using both an individualized educational setting approach and a differentiation of the elements of the Halliwick Method. The pre-intervention phase included medical examination, IQ, measurement of the behaviour according to the Rutter Scale and a Test of Physical Performance for each subject. Next, the subjects were assigned to seven pairs of case studies, where each individual following a Halliwick Methods swimming programme was paired with an individual following a modified swimming programme based on the same method, on physical health variables, IQ, behaviour and motor abilities. The duration of each swimming programme was 24 weeks for each individual, at a frequency of once per week, for 40 minutes. In the light of the findings of this study, further recommendations for the improvement of Halliwick Method procedures were made, common factors that affected the performance of each individual were identified and their relation with performance was explored.  相似文献   

单点与双点拉剪点焊试样的疲劳特性比较   总被引：1，自引：0，他引：1  

WANG Rui-jie  SHANG De-guang  LI Li-sen  LI Cheng-shan 《实验室研究与探索》2007,(10)

对单点与两点焊拉剪点焊疲劳试样分别进行了疲劳试验,观测了疲劳裂纹的形状和萌生位置,分析了两种试样的疲劳性能。通过有限元模型分析了同等载荷作用下两种试样的变形,对比两种试样的载荷幅寿命关系,认为两点试样的承载能力约为单点试样的两倍。基于此,使用单点试样的载荷幅寿命曲线,预测了两点试样的疲劳寿命,寿命预测结果与实验寿命结果一致。  相似文献   

Discriminating Quantity: New Points for Teaching Children with Down Syndrome About Number?     

Jill Porter 《International Journal of Disability, Development & Education》2019,66(2):133-150

ABSTRACT

The focus of much mathematics teaching has been on the acquisition of counting, an area where children with Down syndrome can experience particular difficulties. Research with typically developing children has highlighted how early awareness of quantity provides a strong platform for the acquisition of later mathematical skills and programmes of early intervention have been introduced. Many of these studies are embedded in the work and traditions of developmental and cognitive psychology and can be difficult to access. Consequently, this is an area that has been largely ignored in the curricula of children with Down syndrome. This paper seeks to make this literature more available. It systematically reviews previous research with children with Down Syndrome on these early foundations. It considers seemingly contradictory findings in the light of differences in tasks, their presentation and instructions, and the responses required, in order to draw conclusions and reflect on the implications for teaching and learning. Some of these propositions are in contrast to existing practices and call for further research to test their effectiveness.  相似文献   

Mothers' Experiences of Aggression in Their Tourette's Syndrome Children     

Naydene De Lange  MAJ Olivier 《International journal for the advancement of counseling》2004,26(1):65-77

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Off-pump coronary artery bypass grafting versus on-pumpcoronary artery bypass grafting: which is better in patients with chronic obstructive pulmonary disease?     

朱亚彬  许建屏  刘志勇  杨丹宁  李旭东  李鸿雁 《Journal of Zhejiang University. Science. B》2004,(8)

INTRODUCTION Conventional coronary artery bypass graftin(CCABG) with cardiopulmonary bypass (CPB) habeen accepted as an effective and safe treatment fomulti-vessel coronary heat disease. CPB may stilcontribute to the operation field because of threlatively easier technical requirement; but it alscauses a serious systematic inflammatory reactiowhich will lead to dysfunction of important organand higher cost for the patients. Off-pump coronarartery bypass grafting (OPCABG) has r…  相似文献   

Case Report:Lance-Adams syndrome:a report of two cases     

ZHANG Yan-xing    LIU Jian-ren  JIANG biao  LIU Hui-qin  DING Mei-ping  SONG Shui-jiang  ZHANG Bao-rong  ZHANG Hong  XU Bin  CHEN Huai-hong  WANG Zhong-jin  HUANG Jian-zheng 《Journal of Zhejiang University. Science. B》2007,(10)

Chronic post-hypoxic myoclonus, also known as Lance-Adams syndrome (LAS), is a rare complication of successful cardiopulmanry resuscitation often accompanied by action myoclonus and cerebellar ataxia. It is seen in patients who have un-dergone a cardiorespiratory arrest, regained consciousness afterwards, and then developed myoclonus days or weeks after the event. Worldwide, 122 cases have been reported in the literature so far, including 1 case of Chinese. Here we report 2 Chinese LAS patients with detailed neuroimagings. Cranial single photon emission computed tomography (SPECT) of patient 1, a 52-year-old woman, showed a mild hypoperfusion in her left temporal lobe, whereas patient 2, a 54-year-old woman, manifested a mild bilateral decrease of glucose metabolism in the frontal lobes and a mild to moderate decrease of the N-acetyl aspartate (NAA) peak in the bilateral hippocampi by cranial [18F]-fluorodeoxyglucose positron emission tomographic (PET) scan and cranial magnetic resonance spectroscopy (MRS), respectively. We also review the literature on the neuroimaging, pathogenesis, and treatment of LAS.  相似文献