Acute effects of intense interval training on running mechanics     

Margaret H. Collins  David J. Pearsall  Gerald S. Zavorsky  Hamid Bateni  Rene A. Turcotte  David L. Montgomery 《Journal of sports sciences》2013,31(2):83-90

The aims of this study were to determine if there are significant kinematic changes in running pattern after intense interval workouts, whether duration of recovery affects running kinematics, and whether changes in running economy are related to changes in running kinematics. Seven highly trained male endurance runners (VO 2max = 72.3 +/- 3.3 ml kg -1 min -1 ; mean +/- s) performed three interval running workouts of 10 X 400 m at a speed of 5.94 +/- 0.19 m s -1 (356 +/- 11.2 m min -1 ) with a minimum of 4 days recovery between runs. Recovery of 60, 120 or 180 s between each 400 m repetition was assigned at random. Before and after each workout, running economy and several kinematic variables were measured at speeds of 3.33 and 4.47 m s -1 (200 and 268 m min -1 ). Speed was found to have a significant effect on shank angle, knee velocity and stride length (P ? 0.05). Correlations between changes pre- and post-test for VO 2 (ml kg -1 min -1 ) and several kinematic variables were not significant (P > 0.05) at both speeds. In general, duration of recovery was not found to adversely affect running economy or the kinematic variables assessed, possibly because of intra-individual adaptations to fatigue.  相似文献   

Dietary supplements     

Ron J Maughan  Doug S King  Trevor Lea 《Journal of sports sciences》2013,31(1):95-113

For the athlete training hard, nutritional supplements are often seen as promoting adaptations to training, allowing more consistent and intensive training by promoting recovery between training sessions, reducing interruptions to training because of illness or injury, and enhancing competitive performance. Surveys show that the prevalence of supplement use is widespread among sportsmen and women, but the use of few of these products is supported by a sound research base and some may even be harmful to the athlete. Special sports foods, including energy bars and sports drinks, have a real role to play, and some protein supplements and meal replacements may also be useful in some circumstances. Where there is a demonstrated deficiency of an essential nutrient, an increased intake from food or from supplementation may help, but many athletes ignore the need for caution in supplement use and take supplements in doses that are not necessary or may even be harmful. Some supplements do offer the prospect of improved performance; these include creatine, caffeine, bicarbonate and, perhaps, a very few others. There is no evidence that prohormones such as androstenedione are effective in enhancing muscle mass or strength, and these prohormones may result in negative health consequences, as well as positive drug tests. Contamination of supplements that may cause an athlete to fail a doping test is widespread.  相似文献   

Parameterising expertise in coaching: Past,present and future     

Christine Nash  Russell Martindale  Dave Collins  Amanda Martindale 《Journal of sports sciences》2013,31(10):985-994

Abstract

Research into expertise is increasing across a number of domains pertinent to sport. Whilst this increase is particularly apparent in coaching, a key question is how to identify an expert coach? Accordingly, this paper draws upon existing studies into expert coaches to address this issue; in particular, the criteria used to select expert coaches for research purposes and the methods used in expert coach research. Based on these data, we contend that the elements of expertise are not fully reflected within currently accepted criteria which, in turn, results in expert coaching research not necessarily identifying the appropriate individuals to study. The paper concludes with recommendations for more rigorous criteria for selecting expert coaches and highlights the associated implications for the future training and development of expert coaches.  相似文献   

‘Samurai’ politics: Japanese cultural identity in global sport – The Olympic Games as a representational strategy     

Sandra Collins 《国际体育史杂志》2013,30(3):357-374

Modern Japan has considered global sport an appropriate forum for not only defining the national cultural identity of Japan but also for conducting its international diplomacy. The recent phenomenon of Japanese baseball athletes ‘defecting’ from Japanese leagues to play for the American baseball leagues has often been described in political terms. This paper argues that the current trend of analysing Japanese nationals playing baseball in America in political terms can be historically contextualized by reviewing the bids by Japanese cities for the 1940, 1964, 1998 and 2016 Olympic Games.  相似文献   

Early Football and the Emergence of Modern Soccer,c. 1840–1880     

Tony Collins 《国际体育史杂志》2013,30(9):1127-1142

The origins of the modern football codes have attracted considerable attention from historians of sport over the past two decades, resulting in a vigorous debate between the self-described ‘revisionists’, led by Adrian Harvey, and the followers of Eric Dunning, dubbed by their opponents as the ‘orthodox’ view. However, this article argues that both sides commit the same methodological errors: an overestimation of the importance of written rules, an ahistoric view of culture and continuity, and a tendency to view the past through the lens of the present. By re-examining the historical record of early forms of football and presenting a broader contextual perspective for the emergence of the football codes in the 1840 to 1880 period, the article aims to address some of the key historiographical issues that confront historians of sport today.  相似文献   

‘Noa mutton,noa laaking’: the origins of payment of play in rugby football, 1877–86     

Tony Collins 《国际体育史杂志》2013,30(1):33-50

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Applying White Dialectics: Exploring Whiteness and Racial Identity among White College Athletes     

Joshua D. Vadeboncoeur  Trevor Bopp 《Quest (Human Kinetics)》2019,71(1):1-20

This article seeks to synthesize and apply White racial identity theory and concomitant research to the interaction between athletic and racial identity, specifically as it relates to the experiential variations of how race impacts White athletes within the college sport environment. White dialectics, or the tensions that White Americans experience as dominant social group members, serve as the guiding theoretical framework and provide a theoretical lens through which the experience of White college athletes is examined at each distinct dialectic. Through this article, the application of White dialectics offers a theoretical foundation for developing a better understanding of how White college athletes not only make sense of their racial identity, but also understand their racialized experiences within intercollegiate athletics.  相似文献   

What History Can Teach Us About Science: Theory and Experiment, Data and Evidence     

Trevor H. Levere 《Interchange》2006,37(1-2):115-128

Scientists often use more than the results of experiment to arrive at a result; they use anticipation and analogy to arrive at the results that fit their theories, and sometimes they correct results in the light of analogy. They also need to be clear about the difference between accuracy and precision. They do all this using not only theories, but also apparatus, and the interplay between apparatus and the development of concepts and theories is often crucial. Historians of chemistry (notably including the recent work of Usselman, Rocke, and Holmes) furnish us with plenty of examples of such interplay, and of the selection of data in the light of theory. Lavoisier, Dalton, and Liebig can each teach us a good deal about the way that good scientists arrive at reproducible results.  相似文献   

Problematizing the construct of ‘the Chinese learner’: insights from ethnographic research   总被引：1，自引：0，他引：1  

Trevor Grimshaw 《Educational studies》2007,33(3):299-311

Large numbers of students from the Chinese‐speaking world are nowadays enrolled in Western universities, prompting the need for awareness of their educational beliefs and practices. Although an established literature seeks to characterize ‘the Chinese learner’, much of this research results in stereotypical representations of a ‘reduced Other’: passive, uncritical and over‐reliant on the instructor. This paper, which is based on ethnographic research conducted in universities in the People’s Republic of China, aims to illuminate some of the common misperceptions of Chinese educational cultures.  相似文献   

‘Is it like one of those infectious kind of things?’ The importance of educating young people about HPV and HPV vaccination at school     

Cristyn Davies  Susan Rachel Skinner  Tanya Stoney  Helen Siobhan Marshall  Joanne Collins  Jane Jones 《Sex education》2017,17(3):256-275

Abstract

The National Human Papillomavirus (HPV) Vaccination Program in Australia commenced in 2007 for girls and in 2013 for boys, using the quadrivalent HPV [4vHPV] vaccine. In Australia, students are primarily vaccinated en masse, on school grounds, after parental/guardian consent is obtained. Students most often receive little, or no, education at school about HPV or HPV vaccination prior to immunisation. There is also some uncertainty about where young people can and should obtain reliable information about the vaccine, outside of school. We conducted a cluster randomised controlled trial of a complex intervention in schools. This study aimed to improve: (1) student knowledge about HPV vaccination; (2) psycho-social outcomes and (3) vaccination uptake. In this paper, we briefly outline our educational intervention and discuss its implementation by educators including facilitators and barriers. We also discuss the study findings pertaining to student knowledge about HPV and HPV vaccination and their attitudes to vaccination across control and intervention schools. Study results showed students in intervention schools demonstrate greater knowledge and understanding of HPV and HPV vaccination. Greater knowledge and understanding of HPV and HPV vaccination appeared to promote positive attitudes towards vaccination and supported confidence with vaccination.  相似文献