共查询到20条相似文献，搜索用时 484 毫秒
1.
2.
3.
Paul S. Glazier 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):180-182
A proficient serve is critical to successful tennis performance, and consequently coaches and players devote considerable time refining this stroke. In so doing, a wide variety of interventions are used or trialled, generally with very little empirical support. This study examined the efficacy of a commonly used service intervention, where players focus on exaggerating their finish (arabesque) position to promote specific changes in lower limb and trunk kinematics. The kinematics of eight high-performance junior players hitting flat serves were compared to the acute changes in kinematics elicited by the arabesque follow through position on serves using a 10-camera VICON MX motion analysis system. The significantly greater front (landing leg) hip flexion (p < 0.05) and forward trunk flexion (p < 0.05) confirmed the more exaggerated arabesque landing position following the arabesque instruction. The arabesque instruction resulted in increased frontal plane trunk range of motion and peak angular velocity in the forward swing, and increased leg drive during the drive phase. Practically, the results support the use of the arabesque instruction, effectively promoting the desired acute changes in trunk kinematics (i.e. increased frontal plane trunk rotation angular velocity) and leg drive (i.e. increased back knee extension angular velocity and front/back vertical hip velocity). 相似文献
4.
5.
《当代体育》2008,(25)
for miioslao klose Just one goal makes my heart feel mect. Can hardly belieue it(yeah). He s the best foiward in Gemnany. Nciioslow klose. Just one smile and tneie s no way back. Can haiely becieue it(yeal) How amauing the achiuement he did. Gocden shoot Awand. Miio,you re the best one in my mind. Now ancl forwer more. I lay my loue on you. It s au I wanna do. Ererytime you goal I can t help screaming. I U watch your euery game. Whooping and shouting for you de there. As I lay my lore on you. As I lay my lore on you. 相似文献
6.
北京时闻8月28日下午15点15分．中国选手孟关良．杨文军在奥运会男子500米划艇决赛中。以1分40秒278的成绩夺冠，这是中国人在雅典拿到的第28块金牌，更是中国皮划艇项目的第一枚奥运金牌．它标志蓍中国奥运史上的最高金牌纪录将在雅典改写．更标志着这条静泊奥运会水域几十载的中国艇鸣笛起航。 相似文献
7.
8.
9.
在欧洲战场,持续烧钱的切尔西终于如愿地捧得了欧洲冠军杯;在英超,凭着阿布扎比财团无限的财力,曼城终于重温了44年的联赛冠军梦;而在中超,房地产的热钱助推升班马恒大毫无悬念地拿下了冠军。 相似文献
10.
Ian C. Kenny Eric S. Wallace Steve R. Otto 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):183-186
Abstract In this study we compared the kinematic features of the throwing motion between young baseball players of different age groups. Forty‐four Japanese baseball players aged 6.1 to 12.3 years who regularly played baseball, including pitchers and position players, had their throwing actions analyzed three‐dimensionally using high speed videography. Of this sample, 26 players aged above 9 years of age were categorized as the senior group, while the remaining 18 were categorized as the junior group. Senior group throwers had greater height and body mass, and produced a greater ball speed than junior group throwers. The throwing arm movement of senior group throwers was similar to that of adult skilled players. However, in the junior group throwers, the shoulder horizontal adduction angle was larger during the arm acceleration phase, and the maximum angular velocities of elbow extension and shoulder internal rotation occurred later than in senior group throwers. These results indicate that players aged above 9 years can acquire a mature throwing arm movement, while players younger than that will use an immature motion. A possible reason why these differences were shown is that the official baseball is relatively heavy for junior group throwers; they would be better advised to use a lighter ball in throwing practice. 相似文献
11.
In February of 2011, an earthquake destroyed the only all-weather athletics facility in the city of Christchurch, New Zealand. The all-weather track has yet to be replaced, and so since the loss of the track, local Christchurch athletes have only had a grass track for training and preparation for championship events. The present study considers what effect the loss of the training facility has had on the performance of athletes from Christchurch at national championship events. Not surprisingly, the study finds that there has been a deterioration in the performance in events that are heavily dependent upon the all-weather surface. However, somewhat more surprisingly, the loss of the track appears to have caused a significant improvement in the performance of Christchurch athletes in events that, while on the standard athletics programme, are not heavily dependent on track surface. 相似文献
12.
13.
Jason Holt 《体育哲学杂志》2017,44(1):72-80
Stephen Mumford argues that aesthetic and moral values in sport are interdependent, focusing on cases where immorality taints beautiful performance. This interdependence thesis is insightful but, I argue, in need of refinement, as its normative implications are unclear and perhaps implausible (e.g. the Nazi aesthetics problem). I also challenge Mumford’s perspective on the infamous Dynamo Kiev death match. Whereas Mumford claims that the match’s morally oppressive circumstances detract from it so that ‘it was not something knowingly we should have admired aesthetically’, I argue that, on the contrary, and in light of what Mumford says about other cases, such circumstances actually enhance the game’s aesthetics such that it would be wrong not to appreciate it aesthetically. 相似文献
14.
15.
Juggling People on the Springboard by Shenzhen Fuyong Acrobatic Troupe won the gold medal on the 5th National Youth Acrobatic Contest. As a young private-owned acrobatic troupe founded in 2001, it is the second time for it to win the gold medal on the National Youth Acrobatic Contest. However, it is the 相似文献
16.
Ruwen Wang Haili Tian Dandan Guo Qianqian Tian Ting Yao Xingxing Kong 《运动与健康科学(英文)》2020,9(3):211-227
Background:Exercise is considered as an important intervention for treatment and prevention of several diseases,such as osteoarthritis,obesity,hypertension,and Alzheimer's disease.This review summarizes decadal exercise intervention studies with various rat models across 6 major systems to provide a better understanding of the mechanisms behind the effects that exercise brought.Methods:PubMed was utilized as the data source.To collect research articles,we used the following terms to create the search:(exercise[Title]OR physical activity[Title]OR training[Title])AND(rats[Title/Abstract]OR rat[Title/Abstract]OR rattus[Title/Abstract]).To best cover targeted studies,publication dates were limited to"within 11 years."The exercise intervention methods used for different diseases were sorted according to the mode,frequency,and intensity of exercise.Results:The collected articles were categorized into studies related to 6 systems or disease types:motor system(17 articles),metabolic system(110 articles),cardiocerebral vascular system(171 articles),nervous system(71 articles),urinary system(2 articles),and cancer(21 articles).Our review found that,for different diseases,exercise intervention mostly had a positive effect.However,the most powerful effect was achieved by using a specific mode of exercise that addressed the characteristics of the disease.Conclusion:As a model animal,rats not only provide a convenient resource for studying human diseases but also provide the possibility for exploring the molecular mechanisms of exercise intervention on diseases.This review also aims to provide exercise intervention frameworks and optimal exercise dose recommendations for further human exercise intervention research. 相似文献
17.
Previous analyses (i.e., Bernstein & St. John, 2006; Sender & Sullivan, 2008) of the television show The Biggest Loser have detailed its negative presentation of the obese body, potential consequences for viewers, and its role as a technology of governmentality. However, there has been little exploration of how audience members conceptualize and enact the messages communicated in the show within these intricate frameworks. The current research used information from semistructured interviews with 40 dedicated viewers to capture the salient meanings they ascribed to The Biggest Loser within the themes of governmentality and self-concept. Overall, the group experienced the program as a transformative, entertaining, and inspirational event that produced little change in their exercise behavior. Thus, the role of reality television in creating healthy behavior change is potentially limited. 相似文献
18.
19.
《湖北体育科技》2012,31(3)
随着网球运动在中国飞速发展,网球运动的研究也成为体育领域中关注的论题。对网球运动员目标定向与归因方式的研究还比较缺乏。鉴于研究应用心理测量法对网球运动员的目标定向和归因方式进行探讨。了解中国网球运动员的目标定向及归因方式的现状,丰富运动员对目标定向和归因方式的认识。研究结果显示：网球运动员的目标定向在性别上存在显著性差异;网球运动员基本归因类型,在成功情境下为：内部的、稳定的、可控的;在失败情境下为：内部的、稳定的、不可控的;网球运动员在成功情境下的归因方式没有性别差异,在失败情境下内外源、稳定性存在性别差异;网球运动员的目标定向与归因方式的相关性不高,存在着低度相关。 相似文献