传统体育对绝经女性骨密度的影响   总被引：25，自引：1，他引：24  

周勇 《北京体育大学学报》2004,27(3):354-355

为了探讨传统体育锻炼对绝经女性骨密度的影响.将60名绝经女性,随机分为非体育锻炼组和跳绳、木兰拳、太极拳套路及太极推手等4个运动组,经10个月的实验.结果表明,非锻炼组骨量丢失,骨密度下降,4个运动组的骨密度均增加,并且太极推手组所测各指标及跳绳组桡、尺骨骨密度增加得更明显;经组间比较,太极推手组优于跳绳组(P<0.05),跳绳组优于木兰拳或太极拳套路组(P<0.05).结论:传统体育跳绳、木兰拳及太极拳运动对绝经女性骨密度的影响是积极的,是绝经女性抵抗骨量丢失,促进骨密度增大的有效运动,并且太极推手对骨量增加更全面,增大骨密度更有效.  相似文献   

排球正面上手发球技术教法研究   总被引：3，自引：0，他引：3  

许明荣  姚小玲 《体育科技》2001,22(1):15-17

在对排球正面上手发球技术教学难点及其成因分析的基础上,对课次与阶段划分、教学顺序、教学时数与练习次数、练习手段作了全面的分析,为完善和丰富正面上手发球技术教学的理论与方法提供了一定的参考依据.  相似文献   

Searching for momentum in NBA triplets of free throws     

Elia Morgulev  Ofer H. Azar  Michael Bar-Eli 《Journal of sports sciences》2020,38(4):390-398

ABSTRACT

The literature on momentum is still undecided, with mixed results whether momentum exists or is only perceived to exist (“hot hand fallacy”). We explore whether momentum exists by looking at cases in which a basketball player has three consecutive free throws. A free throw is a well-defined task executed in a stable environment, allegedly giving momentum optimal chances to occur. Taking 14 NBA seasons we collected over 4500 three-free-throw sets (triplets). We obtained the outcomes of the shots as well as some additional variables about the player and the game: the player’s average free-throw percentage, home or away, and the game score and the quarter when the free throws were attempted. We first analyse the hit rates in the three shots and then proceed to regression analysis that also controls for the abovementioned variables. We address several concerns raised in the literature. All comparisons and analyses yield the same conclusion that there is no evidence for momentum in the data.  相似文献   

Self-reported symptoms and risk factors for digital ischaemia among international world-class beach volleyball players     

Daan Van De Pol  Sena Alaeikhanehshir  Mario Maas  P. Paul F.M. Kuijer 《Journal of sports sciences》2016,34(12):1141-1147

The prevalence of ischaemia-related symptoms is remarkably high among elite indoor volleyball players. Since the exposure to sport-specific demands may be higher in beach volleyball compared to indoor volleyball, the aim of this study was to assess the prevalence of ischaemia-related symptoms and associated risk factors among world-class beach volleyball players. Therefore, a questionnaire survey was performed among beach volleyball players active during the 2013 Grand Slam Beach Volleyball in the Netherlands. In total, 60 of the 128 beach volleyball players (47%) participated: 26 males and 34 females from 17 countries. The self-reported prevalence of cold or blue or pale digits in the dominant hand during or immediately after practice or competition was 38% (n = 23). Two risk factors were independently associated with symptoms of blue or pale digits: more than 14 years playing volleyball (odds ratio (OR) 4.42, 90% confidence interval (90% CI) 1.30–15.07) and sex (female) (OR 4.62, 90% CI 1.15–18.57). In conclusion, the prevalence of symptoms associated with digital ischaemia is high among international world-class beach volleyball players. Female sex and the length of the volleyball career were independently associated with an increased risk of ischaemia-related symptoms. The high prevalence of these seemingly innocuous symptoms and possible associated risk factors warrant regular monitoring since early detection can potentially prevent thromboembolic complications and irreversible tissue damage.  相似文献   

东汉草书艺术的演变及其精神内质   总被引：1，自引：0，他引：1  

徐华 《华侨大学学报(哲学社会科学版)》2002,(4):109-116

西汉末至东汉中后期，草书体确立，并由为交流而书写的实用工具升华为一种以审美为最高目标的艺术。这一由实用到审美的演变，不仅标志着中国艺术的观念由非自觉到自觉的飞跃，而且蕴涵了东汉士人精神世界中个体生命意识的自觉和艺术精神的萌生。这一变化，与东汉时期社会思潮的兴替变迁密切相关。  相似文献   

开创具有民族地域特色的广西高校体育教学新模式     

廖柳华 《柳州职业技术学院学报》2007,7(3):150-152

对现阶段广西高校体育教学的现状进行分析,提出具体的对策与建议,以期为今后在广西高校开展民族体育活动提供理论依据.争取开创出具有民族地域特色的广西高校体育教学新模式,促进民族传统体育项目与高校体育教学工作的整体优化,使其得到应有的传承、保护与弘扬,从而让中华民族传统体育得到发扬光大.  相似文献   

单音节持具类手部动词初步研究     

王婷 《商丘职业技术学院学报》2011,10(1):82-83

单音节手部动词指需要用手参与才能完成的具体动作的动词。持具类手部动词是手部动词的一个小类,其特点是在完成动作时必须使用身体器官以外的工具。持具类手部动词的两个典型句式:含使用工具的句式为"NP1+用+GN+V+C+NP2",不含使用工具的句式为"NP1+V+C+NP2"。  相似文献   

双拇指手的模糊滑动模态控制     

郭敬  赵宏才  刘胜杰 《辽宁科技学院学报》2011,13(4):20-22

为了实现双拇指手位置的精确控制,将模糊控制和滑动模态控制相结合,建立手指关节的状态方程,通过模糊控制规则确定滑动模态控制量,减小了滑模控制器的颤抖。仿真结果表明模糊滑动模态控制不仅可以抑制抖动而且具有良好的性能。  相似文献   

“手”和hand语义结构的相似性认知分析     

《校园英语(教研版)》2016,(11):213-214

手作为人体最为重要的身体部分之一,是人与外界接触的最主要的途径。本文以隐喻理论和转喻理论为基础分析汉语"手"和英语手"hand"的语义结构,以期揭示隐藏在语义背后的不同文化背景下对人体部位"手"的认知规律的相同的点。本文认为,由于人类相同的人体构造和感知能力决定了"手"和hand的认知功能和规律方面有很多共同点。  相似文献   

排球比赛中应用换手扣球技术的可行性研究     

何锋 《武汉体育学院学报》2002,36(4):104-105

对排球的换手扣球技术进行了探讨、研究，认为换手扣球技术在排球比赛中的应用是可行的，应该进行推广。并对这一技术将会给我国排球4号位强攻和2、3号位的集体进攻战术带来一系列变化和发展进行了分析。  相似文献