共查询到20条相似文献，搜索用时 15 毫秒
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《哈尔滨体育学院学报》2007,(6)
A州姗甲m阮F朋~ DISCu8Si佣叨win沈r olympicG~’Gene耐on and Devel叩二ni····························································……2衬刀2人泣一，川月召(1一1) D助dor FO叭口口R二二卜onT椒hing Qua 相似文献
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Ivan Cuk Dragan Mirkov Aleksandar Nedeljkovic Milos Kukolj Dusan Ugarkovic 《Sports biomechanics / International Society of Biomechanics in Sports》2016,15(2):207-219
The present study explored the method of testing muscle mechanical properties through the linear force–velocity (F–V) relationships obtained from loaded vertical jumps. Specifically, we hypothesised that the F–V relationship parameters depicting the force, power, and velocity of the tested muscles will differ among individuals of different physical fitness. Strength trained, physically active, and sedentary male participants (N = 10 + 10 + 10; age 20–29 years) were tested on maximum countermovement and squat jumps where manipulation of external loads provided a range of F and V data. The observed F–V relationships of the tested leg muscles were approximately linear and mainly strong (median correlation coefficients ranged from 0.77 to 0.92; all p < 0.05), independently of either the tested group or the jump type. The maximum power revealed higher values in the strength trained than in the physically active and sedentary participants. This difference originated from the differences in F-intercepts, rather than from the V-intercepts. We conclude that the observed parameters could be sensitive enough to detect the differences among both the individuals of different physical fitness and various jump types. The present findings support using loaded vertical jumps and, possibly, other maximum performance multi-joint movements for the assessment of mechanical properties of active muscles. 相似文献
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AbstractThe consistency of community size effects in North American contexts but not elsewhere, reinforces the notion that the effect is driven by socio-cultural factors specific to the country under examination. In order to identify and understand the various forces driving the community size effect, it is important to determine whether the effect has changed over time. Stability or instability over time would assist researchers in identifying the specific socio-cultural mechanisms driving these effects. This study compared the influence of community size on the likelihood of being drafted into the National Hockey League (NHL) among Canadian ice hockey players drafted to play in the NHL between 1985 and 2009. Although there was some variability over the timespan examined, most notably in communities with between 250,000 and 499,999 inhabitants and over 1,000,000 inhabitants, trends were generally stable over time, suggesting that the socio-cultural mechanisms may have also been relatively stable, although further work is necessary to confirm this assumption. 相似文献
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Dr. Leon E. Smith 《Research quarterly for exercise and sport》2013,84(1):191-197
Abstract Forearm flexion strength of 65 college men was measured at two distances from the elbow at each of three angles of the forearm. The speed of forearm flexion movement was measured through an arc of 85°. Ebel intraclass reliabilities for strength and speed were high, i.e., .95 to .99. The extremely low correlations between limb strength and speed of movement, which ranged from —.06 to .14, are in agreement with the majority of the low correlations reported in earlier studies. The findings of this study support the theory of specificity in that individual differences in the speed of a limb involving a single joint are predominantly independent of strength measures associated with that limb and joint. 相似文献
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Tae-Seok Jeong Tom Reilly James Morton Sang-Won Bae 《Journal of sports sciences》2013,31(11):1161-1166
Abstract The aim of this study was to quantify the physiological loads of programmed “pre-season” and “in-season” training in professional soccer players. Data for players during each period were included for analysis (pre-season, n = 12; in-season, n = 10). We monitored physiological loading of training by measuring heart rate and rating of perceived exertion (RPE). Training loads were calculated by multiplying RPE score by the duration of training sessions. Each session was sub-categorized as physical, technical/tactical, physical and technical/tactical training. Average physiological loads in pre-season (heart rate 124 ± 7 beats · min?1; training load 4343 ± 329 Borg scale · min) were higher compared with in-season (heart rate 112 ± 7 beats · min?1; training load 1703 ± 173 Borg scale · min) (P < 0.05) and there was a greater proportion of time spent in 80–100% maximum heart rate zones (18 ± 2 vs. 5 ± 2%; P < 0.05). Such differences appear attributable to the higher intensities in technical/tactical sessions during pre-season (pre-season: heart rate 137 ± 8 beats · min?1; training load 321 ± 23 Borg scale · min; in-season: heart rate 114 ± 9 beats · min?1; training load 174 ± 27 Borg scale · min; P < 0.05). These findings demonstrate that pre-season training is more intense than in-season training. Such data indicate that these adjustments in load are a direct attempt to deliver training to promote specific training adaptations. 相似文献
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懒懒地坐在电脑前,和平常一样为自己泡一杯Black coffee,然后打开音乐播放器,任意大利之夏的音符在耳朵里畅游。咖啡、音乐和足球就这样糅合在一起,糅合进我的生活里,时间阃工作突然不再沉闷,一切都变得富于激情和幻想。回想起1990年那个夏天,我跟世界杯的第一次,正是乔吉奥·莫罗德尔(Giorgio Moroder)和吉娜·娜尼尼(Gianna Nannini)沙哑而又激昂的嗓音,带着我走进意大利,走近世界杯。音乐和足球,像两个孪生的兄弟,不可分割。他们把世界缩小,让所有的语言都成为多余。在16年之后,我同样期待着夏天的来临,期待着那些振奋人心的旋律…… 相似文献
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Neil Wigglesworth 《国际体育史杂志》2013,30(2):145-157
Open-boat sailing boomed in Sydney, Australia, during the 1890s, as a number of new sailing clubs emerged in the city's working waterfront suburbs. Open boats have since been remembered as ‘typically Australian’, radically opposed to the forms and ceremonies of the yachting establishment, and even as sharing the characteristics of the bushman, an archetype of Australian national identity. This article traces the rise of open-boat sailing as a working-class spectator sport and the associated image of an ‘open boat legend’. It argues that open-boat sailing remained a Sydney legend in the 1890s. However, links to working traditions and place have made it possible for popular histories of sailing and yachting to present the open boats and sailors of the period with identifiably Australian characteristics. 相似文献
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This article examines the social forces underlying FIFAgate. Why do corrupt practices, which are often highly consolidated or even institutionalized, suddenly become scandalous? What is a scandal? Why did FIFA fall into crisis in 2015 and not before? To answer these questions, it is necessary to look at the sequence of thrusts and parries between all the parties involved. Our analysis embraces the notion that social processes are based on relationships in order to provide insights into why and how denunciations can lead to long-tolerated corrupt practices suddenly becoming compromising enough to force an organization’s leaders to implement measures that would have previously been unimaginable. We use multiple sources to examine the emergence of FIFAgate and the way FIFA overcame previous critical situations, describing how FIFA neutralized earlier allegations and developed a remarkable ‘resilience’ to scandal. Finally, we analyse the successive mobilizations whose domino effect led to the emergence of FIFAgate and the measures FIFA took to contain the scandal. Our research enabled us to draw up a new theoretical model for analysing corruption scandals. 相似文献
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《当代体育》2003,(40)
西方社会的生活方式在50年代得到了很大的改变。美国人自由、开放的生活方式正在深入社会。50年代,各种职业运动开始显露萌芽,世界一级方程式率先在英国鸣枪;1950年,世界杯的冠军奖杯被命名为“雷米特杯”,以纪念世界杯发起人法国人雷米特执政国际足联25周年。1950年以前,职业篮球运动员中,清一色的全是白人,波士顿凯尔特人队和华盛顿首都人队引进了黑人球员后,该消息成为报纸的头条新闻。 50年代,罗切斯特皇家队,福特韦恩佐勒活塞队、印第安纳波利斯考特斯卡斯队(后来更名为喷气机队)、纽约尼克勃克斯队(又译灯笼裤队)、波士顿凯尔特人、费城武士队是美国篮球传统强队。 相似文献
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Abstract We explored sport performers’ cognitive appraisals of organisational stressors. The relevant demands and transactional alternatives that athletes experience in relation to the situational properties were identified. Thirteen national standard swimmers completed semi-structured, interval-contingent daily diaries for a 28-day period. A combination of inductive and deductive content analysis was used to organise and analyse the diary entries with a focus on the following areas: organisational stressors, their underlying situational properties, and the swimmers’ transactional alternatives. One hundred and thirty-one of the organisational stressors were appraised as threat, 41 as challenge, and 83 as harm/loss. Support was found for the majority of Lazarus and Folkman's (1984) situational properties with the only exception being temporal uncertainty. Imminence was associated with the greatest number of threat appraisals (47), novelty was associated with the greatest number of challenge appraisals (17), and duration was associated with the greatest number of harm/loss appraisals (22). It is concluded that appraisal plays a pivotal role in sport performers’ experiences of their organisational environment. Swimmers’ transactional alternatives are influenced by the situational properties of the stressors encountered. 相似文献
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Christopher Cushion 《Sport, Education and Society》2016,21(6):851-867
The aim of this paper was to critically review existing literature relating to, and critically analyse current conceptualisations of, ‘coaching philosophy’. The review reveals a bewildering approach to definitions, terms and frameworks that have limited explanation and reveal a lack of conceptual clarity. It is argued that rather than provide clarification and understanding the existing literature conflates coaching rhetoric and ideology with coaching philosophy and serves to reproduce existing coaching discourse rather than explain coaching practice. The paper problematises the unquestioned assumptions currently underpinning ‘coaching philosophy’; namely the overemphasis of coaches' agency and reflexivity, the downplaying of the significance of social structure on coaches' dispositions and the acceptance that coaching practice is an entirely conscious activity. The paper argues for an alternative philosophy of coaching that uses philosophic thinking to help coaches question existing ideology, and critically evaluate the assumptions and beliefs underpinning their practice. 相似文献
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Alexander A. Mikheev 《中国体育科技》2009,45(1)
The article presents the most important results of metabolic (hormonal) study of dosed vibration training (DVT).The author presents vibrating training as an alternative to anabolic steroids on the basis of a comparison of the effectiveness of two types of stimulants - forbidden (doping) and non-medicinal non-invasive, relating to permitted physical means.The study shows that the level of androgens (testosterone),corticosteroids (cortisol), thyroid hormones (thyroxine,triiodothyronine),hormones of adenohypophysis (prolactin) increased under the effect of dosed vibration training.At the same time the level of hormones have no changes under traditional strength training with the use of a synthetic anabolic steroid (retabolil).For the duration of a limited period of time (1 microcycles) dosed vibrotraining causes a more powerful secretion of testosterone than the traditional strength training with the use of anabolic steroids. In this case,the overall time spent on the performance of the DVT training program comprises not more than 15% of the time spent on the traditional training exercises. 相似文献
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《集邮博览》2008,(5):72-72
The second session of executive meeting of China 2009 World Stamp Exhibition(’China 2009’ for short)was held in Luoyang,Henan Province on April 8,2008.Yang Xianzu,Chairman of All China Philatelic Federation;Xu Jianzhou, Deputy Director of State Post Bureau;Tan Xiaowei,standing Vice-President of All China Philatelic Federation;Liu Weijia, Secretary-General of All China Philatelic Federation;Chen Xiaowei,Chief of Department of Public Service of State Post Bureau;Li Yongming,Vice-Manager 相似文献
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Beat Knechtle Andrea Wirth Patrizia Knechtle Thomas Rosemann 《Research quarterly for exercise and sport》2013,84(3):593-603
We investigated whether ultraendurance runners in a 100-km run suffer a decrease of body mass and whether this loss consists of fat mass, skeletal muscle mass, or total body water. Male ultrarunners were measured pre- and postrace to determine body mass, fat mass, and skeletal muscle mass by using the anthropometric method. In addition, bioelectrical impedance analysis was used to determine total body water, and urinary (urinary specific gravity) and hematological parameters (hematocrit and plasma sodium) were measured in order to determine hydration status. Body mass decreased by 1.6 kg (p < .01), fat mass by 0.4 kg (p < .01), and skeletal muscle mass by 0.7 kg (p < .01), whereas total body water increased by 0.8 L (p < .05). Hematocrit and plasma sodium decreased significantly (p < .01), whereas plasma urea and urinary specific gravity (USG) increased significantly (p < .01). The decrease of 2.2% body mass and a USG of 1.020 refer to a minimal dehydration. Our athletes seem to have been relatively overhydrated (increase in total body water and plasma sodium) and dehydrated (decrease in body mass and increase in USG) during the race, as evidenced by the increased total body water and the fact that plasma sodium and hematocrit were lower postrace than prerace. The change of body mass was associated with the change of total body water (p < .05), and we presume the development of 相似文献