Neuromuscular and technical abilities related to age in water-polo players     

Fabio De Siati  Guillaume Laffaye  Giorgio Gatta  Antonio Dello Iacono  Johnny Padulo 《Journal of sports sciences》2016,34(15):1466-1472

Testing is one of the important tasks in any multi-step sport programme. In most ball games, coaches assess motor, physical and technical skills on a regular basis in early stages of talent identification in order to further athletes’ development. The purpose of the study was to investigate anthropometric variables and vertical jump heights as a free throw effectiveness predictor in water-polo players of different age groups. Two hundred and thirty-six young (10–18 years) male water-polo players partitioned into three age groups underwent anthropometric variables’ measures and squat- and countermovement-jump tests, and performed water-polo free throws. Anthropometric variables, vertical jump heights and throw speed – as a proxy for free throw effectiveness – resulted different over age groups. Particularly, throw speed changed from 9.28 to 13.70 m · s^?1 (+48%) from younger to older players. A multiple-regression model indicated that body height, squat-jump height and throw time together explain 52% of variance of throw speed. In conclusion, tall height, high lower limb power and throwing quickness appeared to be relevant determinants for effective free throws. Such indications can help coaches during talent identification and development processes, even by means of novel training strategies. Further research is needed over different maturity statuses.  相似文献   

黑龙江省冰雪装备制造业创新成长影响要素与战略研究     

张良祥  连洪业  彭迪  宋智梁  马阳 《冰雪运动》2016,(4)

随着我国成功申办2022年冬奥会,我国将大力发展冰雪运动,并会随之带动旅游、经济和冰雪装备制造业的发展。而冰雪装备制造业的发展直接影响我国冰雪体育事业的开展。采用文献资料、调查、系统分析等研究方法,针对黑龙江省冰雪装备制造业的创新成长问题进行研究,并对黑龙江省的冰雪装备制造业创新成长影响要素以及企业创新成长存在的问题进行分析与总结,认为黑龙江省冰雪装备制造业创新成长的总体状况是良好的,但企业存在资金短缺,经营、管理、技术等方面人才匮乏,企业产品结构单一、产品科技创新意识和能力不强,欠缺可持续发展理念等问题。通过分析影响冰雪装备制造业创新成长的原因,提出引进与自我创新相结合、注重品牌质量、发扬政府主导优势等战略,旨为冰雪装备制造业在黑龙江省的发展提供理论依据。  相似文献   

2015喀山游泳世锦赛混合双人跳水比赛制胜因素分析     

韩风歌 《湖北体育科技》2016,(9):813-818

以2015喀山游泳世锦赛混合双人跳水的比赛视频和成绩为研究对象,综合运用数理统计、录像观察、文献资料等研究方法。研究认为,混合双人跳水比赛除较量运动员的动作完成质量之外,动作的同步性对比赛结果有着极为重要影响,此外动作组别、动作姿势、转体周数及翻腾周数的选择也是影响比赛制胜的因素。  相似文献   

超精密加工方法及其影响因素     

王倩 《邢台职业技术学院学报》2005,22(3):71-72

超精密加工技术在提高机电产品性能、质量方面起着至关重要的作用。本文介绍了几种常见的超精密加工方法，并分析了其影响因素，同时提出相应的技术改进方案。  相似文献   

抓住教学评估契机,促进学校全面发展     

韩延明 《临沂师范学院学报》2005,27(2):1-4

教育评估是政府评价高等学校教学质量与办学水平的重要手段,也是社会了解高等学校办学质量的窗口之一。临沂师范学院将于2005年下半年接受国家教育部本科教学工作水平评估。为实现临沂师范学院“强配置、国际化、高质量、大规模”的办学目标,顺利通过水平评估,从现在开始,就要抓住契机,凝心聚力,充分认识本科教学工作水平评估的重要意义;全校动员、全员参与,真正把各项评建工作落到实处;科学安排、以评促建,促进临沂师范学院全面快速健康发展。  相似文献   

车辆轮轴称重仪的误差分析     

郑惠群 《宁波职业技术学院学报》2005,9(5):10-12

轮轴称重仪是测量车辆各轮、轴重及车辆总重的称重仪器,影响轮轴称重仪称重误差的因素很多,本文将车辆本身结构对轮轴称重仪的误差影响及其他因素的误差影响进行全面分析.  相似文献   

试论有效教学的生命特征   总被引：1，自引：0，他引：1  

谭桂荣 《保山师专学报》2006,25(6):59-61

教学是学校的生命力和灵魂所在,有效教学又是教育工作者执着追求的目标,教学惟有充分体现生命的自由性、完整性、多样性、美丽性以及成长性等重要特征,才是真正意义上的有效教学。  相似文献   

Motivational factors for youth recruitment in voluntary interventions: the case of a community sport program     

Catherine Plante  Annie Jaimes  Carole Turbide 《Sport, Education and Society》2016,21(7):1071-1090

Recruitment is known to be a challenge for intervention programs targeting youths, including sports programs. Following the popularity of the Alter-Action program of the Montreal-based organization DesÉquilibres, we wanted to understand the motivations and barriers to youths' recruitment in this voluntary sports community program. A qualitative methodology was favored. We conducted 27 semi-structured interviews (n = 27) with participants, 5 (n = 5) with the partners, and we carried out a focus group with 5 (n = 5) of the organization's service practitioners. We also conducted a participant observation with youth cohorts and during preparatory meetings. Five factors influencing recruitment emerged: (1) socialization/belonging; (2) training/physical aspects; (3) ‘extraordinary’ dimension; (4) practicality of the program; and (5) social influences. Four key elements thus appear important to consider when promoting the recruitment of youths in voluntary community programs: (1) favoring social interactions; (2) insisting on the specific and beneficial elements of the program; (3) allowing youths to experiment a trial period; and (4) including testimonies of former participants in the information session. Further recommendations for psychosocial intervention programs targeting youths are discussed in this article.  相似文献   

20世纪30年代粤港走私问题探析     

梁向阳 《五邑大学学报(社会科学版)》2002,4(1):50-53,66

20世纪30年代，基于政治、地理及经济等因素，加之世界经济危机风暴的冲击，粤港两地走私现象日趋猖獗。这不但严重影响了粤港间的正常贸易活动，也造成国货滞销，进而在一定程度上抑制了国内经济的发展。  相似文献   

论我国封闭式基金折价问题     

杨建海 《温州大学学报(社会科学版)》2005,18(1):42-45

封闭式基金折价是困扰众多投资和研究的问题，先前有很多研究从不同的角度来探讨原因。本在分析了规模相近的基金折价率变动相关性的基础上，选择了两个可能与折价率变动有关联的变量进行回归分析，结果表明：基金折价率的变动与市场因素不相关，而非市场因素一投资情绪对折价率产生主要影响。  相似文献