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Previous researchers have identified significant differences between laboratory and road cycling performances. To establish the ecological validity of laboratory time-trial cycling performances, the causes of such differences should be understood. Hence, the purpose of the present study was to quantify differences between laboratory- and road-based time-trial cycling and to establish to what extent body size [mass (m) and height (h)] may help to explain such differences. Twenty-three male competitive, but non-elite, cyclists completed two 25 mile time-trials, one in the laboratory using an air-braked ergometer (Kingcycle) and the other outdoors on a local road course over relatively flat terrain. Although laboratory speed was a reasonably strong predictor of road speed (R2 = 69.3%), a significant 4% difference (P < 0.001) in cycling speed was identified (laboratory vs. road speed: 40.4 +/- 3.02 vs. 38.7 +/- 3.55 km x h(-1); mean +/- s). When linear regression was used to predict these differences (Diff) in cycling speeds, the following equation was obtained: Diff (km x h(-1)) = 24.9 - 0.0969 x m - 10.7 x h, R2 = 52.1% and the standard deviation of residuals about the fitted regression line = 1.428 (km . h-1). The difference between road and laboratory cycling speeds (km x h(-1)) was found to be minimal for small individuals (mass = 65 kg and height = 1.738 m) but larger riders would appear to benefit from the fixed resistance in the laboratory compared with the progressively increasing drag due to increased body size that would be experienced in the field. This difference was found to be proportional to the cyclists' body surface area that we speculate might be associated with the cyclists' frontal surface area.  相似文献   

3.
Carbohydrate ingestion can improve endurance exercise performance. In the past two decades, research has repeatedly reported the performance benefits of formulations comprising both glucose and fructose (GLUFRU) over those based on glucose (GLU). This has been usually related to additive effects of these two monosaccharides on the gastrointestinal tract whereby intestinal carbohydrate absorption is enhanced and discomfort limited. This is only a partial explanation, since glucose and fructose are also metabolized through different pathways after being absorbed from the gut. In contrast to glucose that is readily used by every body cell type, fructose is specifically targeted to the liver where it is mainly converted into glucose and lactate. The ingestion of GLUFRU may thereby profoundly alter hepatic function ultimately raising both glucose and lactate fluxes. During exercise, this particular profile of circulating carbohydrate may induce a spectrum of effects on muscle metabolism possibly resulting in an improved performance. Compared to GLU alone, GLUFRU ingestion could also induce several non-metabolic effects which are so far largely unexplored. Through its metabolite lactate, fructose may act on central fatigue and/or alter metabolic regulation. Future research could further define the effects of GLUFRU over other exercise modalities and different athletic populations, using several of the hypotheses discussed in this review.  相似文献   

4.
《Sport in Society》2012,15(1):88-102
This study examines whether a process of internationalization has affected the level of athletic performance amongst high-level athletes competing on the world stage. Top 100 International Association of Athletics Federations (IAAF) rankings were compared at two time points: 1984 and 2006, by event and by gender. We identified internationalization as a determinant of the level of athletic performances. This level increased more in events that witnessed more important shifts in market shares (dynamic internationalization or competitiveness) and where dominance by a subset of countries (static internationalization) decreased. This internationalization clearly affects performances in men's athletics (as the performance has clearly gone up since 1984), but not in women's athletics. Here the general level of women's athletics has actually decreased.  相似文献   

5.
ABSTRACT

The aims of this study were to (1) to explore attentional strategies in expert judo players and (2) investigate how attentional focus affects performance effectiveness and perceptions of workload in expert judo players during real competitions. Fourteen expert male judo players participated in the study. A simulated recall method was used following participants’ competition to explore contents of attention qualitatively. The data analysis process for the qualitative portion of the study was an iterative process between inductive and deductive analyses. Quantitative analyses of performance outcomes and workload were then associated with the qualitative findings. Qualitative results revealed that the focus of attention was dynamic and complex, with technical aspects of the movements as the highest identified focus. Quantitative analyses revealed that reporting a lower quantity of attentional cues and higher percentage of focus on opponent resulted in higher performance effectiveness and less perceptions of workload. This study indicates that cognitive control and automaticity may work in a synergistic manner for successful skill execution in expert performance.  相似文献   

6.
This article explores the development of a football club as a means of understanding its late adoption of professionalism and its unusual wartime conduct. Ipswich Town were the only Football League team not to kick a ball for the duration of the Second World War. Arguably, the underlying causes of the club's inactivity in both global conflicts can be found in the patriotic and staunchly amateur ethos that permeated the organisation, resulting in a very late conversion to the professional game in 1936. When the Amateur Football Association (AFA) seceded from the Football Association (FA) in 1907, Ipswich Town sided with the gentlemen amateurs and competed in the socially-exclusive Southern Amateur League until the season before the club adopted professionalism. The unique nature of Ipswich Town's evolution offers an opportunity to explore the decline of this branch of the game in the face of professional football, the protagonists who were caught up in it, and the relationship between football and civic pride. In wartime, the human and social continuities between the professional company and its amateur predecessor arguably proved to be more influential than the ruptures that resulted from a controversial inter-war abandonment of cherished amateur principles.  相似文献   

7.
Historians have almost universally seen association football in the north of Ireland as a divisive influence. The impacts of sectarian and political tensions on the game have been stressed, alongside the extent to which this sport supposedly feeds into existing divisions. Much of the work carried out has concentrated on the last four decades, though even studies outside this period of widespread civil disorder have highlighted these problems. This paper uses the surviving records of the Ballymena Football and Athletic Club, the local press, census returns and other records to consider aspects of one particular Northern Irish club in the 1920s and 1930s. This short consideration of the players, supporters and shareholders suggests that at least in this case football was successful in bringing together and developing cooperation between men of widely differing political and religious views. While the club was a not a financial success, it was a social and sporting one. The evidence available suggests there was little exhibition of sectarian tension at any level.

Le football en Irlande du Nord dans l'entre-deux-guerres: Ballymena Football and Athletic Club Limited - exclusivité religieuse et politique ou intégration civique

Les historiens ont presque universellement perçu le football en Irlande du Nord sous l'angle d'une influence séparative. L'impact des tensions sectaires et politiques sur le jeu a été souligné, en même temps que la manière dont ce sport est censée s'intégrer dans des divisions existantes. La plupart des travaux effectués se sont concentrés sur les quatre dernières décennies, bien que même les études sur d'autres périodes que celle des troubles civiles aient mis en évidence ces problèmes. Cet article utilise les archives du Ballymena Football and Athletic Club qui ont survécu, la presse locale, des rapports de recensement et d'autres rapports pour reconsidérer les dimensions d'un club particulier d'Irlande du Nord dans les années 1920 et 1930. Ce bref regard sur les joueurs, les supporters et les actionnaires suggère qu'au moins dans ce cas, le football est parvenu à réconcilier et développer la coopération entre des hommes d'origines politiques et religieuses largement différentes. Si le club ne fut pas un succès économique, il en fut un sur le plan social et sportif. Les sources disponibles suggèrent qu'il y a eu peu d'affichage de tensions communautaires à quelque niveau que ce soit.

El fútbol en la Irlanda del Norte de entreguerras. Ballymena Football and Athletic Club Limited: segregación religiosa y política o integración cívica

Casi todos los historiadores han considerado el fútbol en Irlanda del Norte como una influencia segregadora. Se ha subrayado el impacto sobre este deporte de las tensiones sectarias y políticas, así como el grado en que el fútbol se supone que ha alimentado las divisiones existentes. Gran parte de la investigación desarrollada se ha centrado en las últimas cuatro décadas, aunque otros estudios sobre periodos anteriores a esta época de desórdenes civiles generalizados han recalcado estos mismos problemas. El presente artículo utiliza los archivos conservados del Ballymena Football and Athletic Club, la prensa local, registros del censo y otros documentos para analizar aspectos de un club norirlandés en concreto en los años 20 y 30 del siglo XX. Este breve estudio de los jugadores, los seguidores y los accionistas sugiere que por lo menos en este caso el fútbol consiguió integrar y estimular la cooperación entre hombres con creencias políticas y religiosas muy diversas. Si bien el club no constituyó un éxito económico, sí lo fue desde el punto de vista social y deportivo. La información disponible indica que en su seno hubo pocas manifestaciones de tensiones sectarias de cualquier tipo.

Fußball in Nordirland zwischen den Weltkriegen: Ballymena Football and Athletic Club Limited – religiöse und politische Exklusivität oder bürgerliches Mitwirken

Historiker haben Fußball in Nordirland fast übereinstimmend als trennenden Einfluss wahrgenommen. Neben dem Umfang, in dem sich dieser Sport vermutlich auf die bereits vorhandene Spaltung auswirkt, wurde das Einwirken von konfessionsgebundenen und politischen Spannungen auf das Spiel untersucht. Ein großer Teil der durchgeführten Forschung konzentrierte sich auf die letzten vier Jahrzehnte, obwohl auch Studien außerhalb dieser Periode des weitverbreiteten bürgerlichen Widerstands diese Probleme hervorgehoben haben. Diese Abhandlung verwendet noch existierende Aufzeichnungen des Ballymena Football and Athletic Clubs, der lokalen Presse, Volkszählungsberichte und weitere Aufzeichnungen, um die Erscheinung eines ausgewählten nordirischen Klubs in den 1920er und 1930er Jahren nachzuvollziehen. Diese kurze Betrachtung der Spieler, Unterstützer und Anteilseigner lässt vermuten, dass Fußball, zumindest in diesem Fall, erfolgreich darin war, Männer mit äußerst unterschiedlichen politischen und religiösen Ansichten zusammenzubringen und ihre Kooperation zu fördern. Während der Klub kein finanzieller Erfolg war, so war er es doch in sozialer und sportlicher Hinsicht. Das verfügbare Material deutet darauf hin, dass konfessionelle Spannungen auf den verschiedenen Ebenen kaum sichtbar wurden.

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8.
Observational research on professional athletes from the USA suggests differences may exist in sweat sodium loss based on ethnic differences. The New Zealand (NZ) sporting population is mainly of European or Māori/Pacific Island origin. Therefore, this study aimed to describe the fluid-electrolyte balance of athletes by ethnicity. A total of 20 Māori/Pacific Islanders (MP; body mass 100.97 ± 13.05 kg) and 29 NZ European (NZE; body mass 89.11 ± 11.56 kg) elite male athletes were recruited. Sweat rates were determined by body mass change during a 1-h spin cycle exercise session, during which fluid intakes and heart rate were recorded. Sweat samples were analysed for sodium concentration. Mean ± SD sweat sodium concentrations were 73.4 ± 27.2 mmol·L?1 and 55.5 ± 26.8 mmol·L?1 for the MP and NZE groups, respectively (p = 0.070). Sweat rate was 0.93 ± 0.26 L·h?1 for the MP group and 0.89 ± 0.33 L·h?1 for the NZE group (p = 0.357). Fluid intake was 1.05 ± 0.48 L and 0.93 ± 0.49 L for MP and NZE, respectively (p = 0.395). Half of the MP group gained weight during the exercise session compared to 37% of the NZE group. Pre-exercise urine specific gravity was significantly lower amongst the NZE group (1.016 ± 0.009 g mL?1) than the MP group (1.024 ± 0.008 g mL?1) p = 0.001. There was no significant difference in heart rate between the groups, p = 0.082. Hydration practices of athletes in NZ may differ by ethnicity, and this may highlight the need for more targeted education by ethnicity.  相似文献   

9.
Background: The aim of this systematic review was to investigate the association of different components of physical fitness on cognitive performance (CP) and academic performance (AP) in adolescents, taking into account potential confounders. Method: Studies were identified in four databases (Pubmed, SportDiscus, Web of Science, and ProQuest) from January 2005 through to January 2015. A total of 21 articles met the inclusion criteria. Results: 8 studies showed association between physical fitness and CP, and 11 studies with AP. Cardiorespiratory fitness, speed-agility, motor coordination, and perceptual-motor skill are the highest measures associated with CP and AP. However, the findings on strength and flexibility are unclear. Finally, 62% of the 21 studies used confounders. The most controlled confounder were socioeconomic status, fatness, pubertal status, sex, and age. Conclusion: Fitness is associated with higher CP and AP. More research is needed in order to understand the causes of the differential effect of physical fitness components on CP and AP.  相似文献   

10.
《Sport Management Review》2020,23(5):937-951
The way disability is understood and positioned by key stakeholders informs how policies are implemented in the development of pathways to sporting excellence of an athlete with a disability. In this paper, the authors seek to identify which sports policy factors and stakeholders influence the development of athletic career pathways in Paralympic sport (i.e., attraction, retention, competition, talent identification and development, elite, and retirement phases). Drawing from the theories of disability and the literature on elite sport policy, an interview protocol on policy dimensions and principles to support para-athletes’ development was created, and 32 key stakeholders from the Brazilian Paralympic sport context were interviewed. The data revealed that coaching provision and education as a policy factor and coaches with disability-specific knowledge as a stakeholder were perceived as most influential during all the phases of para-athletes’ careers. The classification system emerged as a parasport-specific factor that can facilitate or inhibit the development of para-athletes’ careers, influencing the implementation of policies. The authors suggest that understanding the concept of disability is notably essential when stakeholders have to think strategically and adapt management principles from able-bodied sporting contexts. Therefore, critically positioning disability within policy decision making can improve the thinking, action, and behaviour of policymakers, coaches, and sports managers, leading to the more efficient delivery of successful para-athletes’ careers.  相似文献   

11.
The purpose of this study was to extend understanding of how athletes and coaches in a women’s cycling talent development and selection programme negotiate and normalise athlete abuse in the media. A thematic analysis of six online cycling magazine articles and their representations of the Australian women’s elite cycling development camp was analysed to explore athletic abuse and the (re)production of coaching practices using Bourdieusian theory. The findings revealed a link between the expression of coaching practice and the maltreatment of athletes. Analysis of these articles also revealed that athletes were complicit in the normalisation of coaching practices through the misrecognition of social power embedded in the coaching intervention. The representations by athletes within the articles contributed narratives related to the reproduction and proliferation of abusive coaching practices. This study extends understanding of how taken for granted and power laden aspects of coaching practices can be presented in the media and highlights the implications for coaches, athletes and the general public that consume online cycling media content.  相似文献   

12.
In this article, I will look at the impact of sport on relations between states. In particular, I will study the role that sport has played in enhancing (or damaging) diplomacy in international relations. I will look especially at the role that the Olympics and the Asian Olympics have played in promoting diplomatic breakthroughs between countries. My cases focus on the use of sports diplomacy to foster the end of the Cold War in Asia, studying the breakthroughs between Korea, China and Russia. I will then look at the Beijing Games of 2008 and Guangzhou Asian Games of 2010.  相似文献   

13.
Abstract

Women’s Artistic Gymnastics (WAG) is a sport designed specifically for women. With roots in ballet, calisthenics and eugenics, it was meant to showcase femininity, beauty, and encourage healthy bodies for motherhood, therefore offering socially acceptable sporting opportunities for females. This paper considers whether such sporting opportunities extended to female coaches. We examine the recruitment patterns in relation to gender of some of the top coaches in Australia and New Zealand since the 1980s, who are predominantly migrants. Using archival sources, interviews and personal experience, this paper argues that while so-called feminine or artistic sports can offer greater opportunities for female coaches, WAG in Australia and New Zealand remains dominated by male coaches, who have held the majority of the head coach positions and in many cases, been actively recruited from overseas. The few females who have been employed in top positions have been appointments of ‘convenience’ rather than reflective of a shift away from these gendered employment patterns. Thus, while its creation as a specifically feminine sport may lead WAG to be viewed as a site of increased opportunities for women coaches, deeper exploration reveals an unresolved tension between the use of male and female coaches.  相似文献   

14.
lisahunter 《Sport in Society》2018,21(9):1382-1399
Surfing economies, working through material culture in the form of high fashion clothing, surfing monikers or fashion clothing has had scholarly attention in the past. Unlike other sports however, clothing for performance rather than fashion or cultural consumption remains under-researched. With increasing research on the gendered and sexualized nature of surfing alongside an increasing emphasis on female surfing as athletic performance, a paradox seems apparent. In warm-water competition, women deal with tensions associated with appearance, sponsorship driven by sexual objectification and functional surfwear that increases exposed body surface – while men’s clothing epitomizes comfort, protection and ultimately a reduction in exposed body surface. Under the guise of athletic performance and celebrating female gains in the sport, a patriarchal thread seems to tie up a particular sex, gender and sexuality order that is neither new nor productive for high performance or full participation.  相似文献   

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The suitability of Gray's (1975) three‐factor arousal theory as a model of human performance under stress was investigated in a study of basketball free‐throw shooting. Free‐throw attempts, made by members of an NCAA Division I men's varsity team, were videotaped during one full season. On the basis of Gray's theory, we predicted that increased stress (assumed to be present in games as opposed to practices) would be associated with longer pre‐shot preparations and a greater incidence of overthrow shots. The prediction was confirmed by the results. Moreover, we found that free‐throws were more frequently overthrown when attempted during crucial rather than non‐crucial game situations. Further tests of the utility of Gray's theory are suggested.  相似文献   

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This essay explores the evolution of modern sporting goods retailing through the development of Gamage's (A.W. Gamage Holborn Ltd.) before the First World War. The essay examines how Gamage's exploited new models of fashionable consumerism to create a unique retail environment that directly targeted young male consumers enjoying modern forms of sporting and recreational activities. By the end of the nineteenth century, the so-called ‘People's Popular Emporium’ purported to be the ‘world's largest sport and athletic outfitter’. The essay considers Gamage's rise to prominence in a crucial period in the development of commodity culture. It examines the changing cultural form of shops and shopping in relation to the desires of a burgeoning mass market that sought to express and visibly display its economic, sporting, and social status.  相似文献   

20.
The Coulter Law was a set of Victorian Football League (VFL) recruiting and payment rules that operated from 1930 to 1970 and set maximum wages for individual players. Testing of the conventional view – that most VFL clubs breached these rules to maximise the utility derived from winning games – is hampered by the unavailability of individual wage data. We develop a model that observes connections between player turnover and team performance at three VFL clubs. The ways that clubs managed team payrolls in a regulated labour market are not sufficient to explain variations in team performance. Clubs lost experienced players to minor leagues, regardless of whether they complied with the Coulter Law. The ability of clubs to develop replacement players had a stronger influence on team performance.  相似文献   

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