运动与铁代谢   总被引：22，自引：4，他引：18  

曹建民  田野  赵杰修  金丽 《北京体育大学学报》2003,26(3):331-335

长期、剧烈的运动训练可以导致铁代谢的紊乱,从而引发机体缺铁的发生,也是导致运动性贫血发生的重要原因。运动导致缺铁引起铁代谢失调可能与运动导致铁吸收下降、摄入不足、铁丢失增加、不良的饮食习惯、溶血以及机体应激有关。反映机体铁代谢状况的指标有了一定的研究,血清铁、血清铁蛋白浓度、转铁蛋白浓度以及其它指标的变化在一定程度上可以反映机体铁代谢状况,并在运动实践中用于监测运动员铁状况以及铁制剂服用效果的观察。在运动实践中铁制剂的补充对防治铁缺乏具有一定的效果,但针对性不强,缺乏指标与应用效果的更好的结合。  相似文献   

浅谈气步枪比赛中的节奏     

谢国卿 《体育科研》2003,24(4):41-42

通过对上海市天山中学部分运动员参加上海市第十二届运动会气枪比赛前后经过的回顾和分析,认为气步枪比赛中存在的一个节奏现象是影响运动员技术水平和心理状态的重要因素,也就是最终影响成绩的重要因素.  相似文献   

扁藻细胞电镜观察的制样技术     

邹宁  魏丕伟  肖波  孙育平  王艳华 《烟台职业学院学报》2004,10(3):73-75

以海洋单细胞微藻亚心型扁藻为材料 ,对海水水样中活体单细胞微藻的亚显微结构观察样品的制备技术进行了探索。选用 2 .5 %的戊二醛固定液和 1 %的锇酸固定液对样品进行双固定的技术 ;先酒精后丙酮按浓度梯度顺次进行脱水 ;再用Epon81 2环氧树脂作为包埋剂进行包埋 ;最后经过醋酸铀 -枸橼酸铅双染色后将切片用透射电镜进行亚显微结构的形态观察。采用本方法进行水样中活体样品的电镜制片 ,拍得清晰度较高的电镜照片 ,并通过照片对水样中运动细胞透射电镜样品制备技术进行了分析。  相似文献   

速滑课超前准备教学程序在篮球课中的应用   总被引：1，自引：0，他引：1  

李同彦  袁建国 《沈阳体育学院学报》2004,23(6):850-851

为了在有限的时间内提高速滑课教学质量,使学生更快、更好地学会速度滑冰,提高学生身体素质,培养学生终身体育意识,在篮球课中运用超前观念,将速滑课超前准备教学程序改革实验研究结果的内容与方法应用在篮球课教学中进行教学,收到良好的教学效果。  相似文献   

乒乓球运动员发球前心理定向的研究     

肖军凡 《安徽体育科技》2001,22(1):37-40

乒乓球比赛首先是由发球开始的 ,发球是唯一不受来球制约的 ,其主动性显而易见。运动员发球前的心理定向 ,直接决定着发球质量的优劣 ,影响着技、战术水平的发挥 ,从而影响运动员比赛的成绩  相似文献   

中国跳水队在东京奥运会的备战策略、比赛表现以及在新奥运会周期的备战对策     

贡满诚  白金木  崔永乐  杨光  李紫薇  赵晶 《首都体育学院学报》2022,(1)

在东京奥运会,中国跳水队取得了奥运会参赛以来的最佳成绩。当前,正值2024年巴黎奥运会备战周期,为巩固中国跳水队的竞技实力,同时为备战巴黎奥运会提出竞训建议。运用录像观察法,依据"2019年国际泳联世界跳水系列赛""2019年世界游泳锦标赛""2021年国际泳联跳水世界杯"确定了中国跳水队在东京奥运会的夺冠竞争对手;以科技为支撑,通过提高科学化训练水平增强了中国跳水队在东京奥运会的备战实效。通过分析东京奥运会跳水项目奖牌榜排名前八的国家体育代表队夺冠选手、中国跳水运动员在东京奥运会的比赛表现、中国跳水队在东京奥运会的夺冠竞争对手的比赛表现,提出中国跳水队备战2024年巴黎奥运会的对策:完善夺冠竞争对手信息情报服务机制,加强对夺冠竞争对手的分析;发挥跳水项目科学训练保障团队优势,细化巴黎奥运会周期备战计划;加强中国跳水队思想教育工作,正确认识巴黎奥运会夺冠的参赛形势;进一步提高训练科学化水平,确保中国跳水项目奥运选手的最佳竞技状态。  相似文献   

The Librarian BFF: A Case Study of a Cohort-Based Personal Librarian Program     

Erica England  Leo S. Lo  Arleene P. Breaux 《Journal of Library & Information Services in Distance Learning》2018,12(1-2):3-12

This case study presents the development and implementation of a personal librarian program for a cohort-based, executive-style higher education administration doctoral program. Librarians and the program director collaborated to create a student-centered program based on individual research needs. The personal librarian program was designed to build a close relationship between the librarian and individual students; to help identify their research knowledge gaps; and to identify resources to meet each individual students' research needs.  相似文献   

Juggling competing activities: academic staff as doctoral candidates     

Jan Smith  Jennie Billot  Lynn Clouder  Virginia King 《高等教育研究与发展》2020,39(3):591-605

ABSTRACT

This article explores the experiences of a group of established academic staff in New Zealand and the UK, as they undertake a doctorate in their home institutions. Our interest is in how individuals negotiate this dual status from a cultural-historical activity theory (CHAT) stance that explores how rules, tools, community and divisions of labour, and interacting activity systems, shape doctoral experiences. The focus in this article, having analysed their detailed narrative accounts, is on how academics experience three interdependent activity systems: those surrounding the thesis, the institutional context, and the home-life spheres. Issues related to time, workload and supervision issues, variability in collegial support and impact on personal priorities and time emerged. There is a range of particularities – from easy access to resources/supervisors to inflexible institutional regulations – applicable to this group of doctoral candidates. Negotiating life as an academic with concurrent doctoral candidature provides positive outcomes in terms of teaching, research confidence and general personal and professional development. However, a range of difficulties can also be encountered, particularly in relation to personal and professional relationships, and workload management.  相似文献   

Preparing the Next Generation of Educational Measurement Specialists: A Call for Programs With an Integrated Scope and Sequence     

Mike Russell  Larry Ludlow  Laura O'Dwyer 《Educational Measurement》2019,38(4):78-86

The field of educational measurement has evolved considerably since the first doctoral programs were established. In response, programs have typically tacked on courses that address newly developed theories, methods, tools, and techniques. As our review of current programs evidences, this approach produces artificial distinctions among topics and techniques that are in fact a tightly coupled whole. This position paper advocates a redesign of the scope and sequence for doctoral programs focused on the preparation of the next generations of educational measurement specialists; a redesign that reflects the full life‐cycle of instrument development and use.  相似文献   

A comparison of student teachers’ perceptions of school placement experience in Malta and China Compare     

Damian Spiteri 《Compare》2019,49(6):888-904

ABSTRACT

This study explores the insights about teaching that student teachers elicit from schools when they go on their first school placements. It thereby offers an appraisal of how student teachers experience teaching when still at the relatively early stages of training and how they are socialised into a role where they become protagonists who can create a positive teaching climate in the classroom. The authors approach this study from the perspective of construction of meanings and consider the discourse that takes place in candidate teacher-student interactions in two university settings – in Malta and China, respectively. The study shows how student teachers believe that cultures and cultural differences need to be clearly considered across the curriculum if schools are to promote active learning equitably.  相似文献