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1.
Objectives: To improve well-being and performance indicators in a group of Australian Football League (AFL) players via a six-week sleep optimisation programme. Design: Prospective intervention study following observations suggestive of reduced sleep and excessive daytime sleepiness in an AFL group. Methods: Athletes from the Adelaide Football Club were invited to participate if they had played AFL senior-level football for 1–5 years, or if they had excessive daytime sleepiness (Epworth Sleepiness Scale [ESS] >10), measured via ESS. An initial education session explained normal sleep needs, and how to achieve increased sleep duration and quality. Participants (n?=?25) received ongoing feedback on their sleep, and a mid-programme education and feedback session. Sleep duration, quality and related outcomes were measured during week one and at the conclusion of the six-week intervention period using sleep diaries, actigraphy, ESS, Pittsburgh Sleep Quality Index, Profile of Mood States, Training Distress Scale, Perceived Stress Scale and the Psychomotor Vigilance Task. Results: Sleep diaries demonstrated an increase in total sleep time of approximately 20?min (498.8?±?53.8 to 518.7?±?34.3; p?<?.05) and a 2% increase in sleep efficiency (p?<?0.05). There was a corresponding increase in vigour (p?<?0.001) and decrease in fatigue (p?<?0.05). Conclusions: Improvements in measures of sleep efficiency, fatigue and vigour indicate that a sleep optimisation programme may improve athletes’ well-being. More research is required into the effects of sleep optimisation on athletic performance.  相似文献   

2.
Abstract

On April 1, 2018, the new standards of compliance to the code of the World Anti-Doping Agency (WADA) came into force. The new standards impact all sports. An important amendment has been made to an article of the existing code ‘Additional Roles and Responsibility of the Parties’. Now, all international federations and the unions in agreement with WADA are obliged to reject applications for holding all sporting events from countries that do not comply with the WADA code. By then, Russian elite sport remained in isolation because the Russian Anti-Doping Agency (RUSADA) had no license from WADA until a compromise agreement allowed Russia back into international sports in September 2018. The probability of obtaining permanent return to international sport was extremely low. In order to obtain the license, Russian sport authorities were asked to agree with the reports of Professor McLaren and to admit the existence of doping support in the country at the state level, which seemed improbable. In Russia, although the new standards of the World Anti-Doping Agency code have not caused special concerns it directly impact Russian elite sport. Unless certain conditions were met by 2019, there was a high probability that Russia would not be able to attend large international competitions in the near future, including the 2020 Tokyo Olympics. The situation dictates the choice of the new strategy of development for Russian sport and new model for the fight against doping, which can be not dependent on WADA. To date, there have been no real checks on WADA’s authority other than occasional decisions in the Court of Arbitration for Sport. Academics who are critical of WADA’s functions often find themselves marginalized when the purported global doping “crisis” should bring “all hands on deck” to provide a humanistic and scientific approach that is best for athletes past, present and future. The functions of WADA in investigating, charging and punishing athletes do not contribute to sustainable development of sport and the sports industry around the world, and create unipolar environment of influence on sports development. Therefore, in this article, we describe some alternative forms and new order of regulation of the anti-doping relations in sport.  相似文献   

3.
Abstract

The study was aimed to explore distinct players’ groups according to their anthropometric and individual features, and to identify the key performance indicators that discriminate player groups. Match statistics, anthropometric and personal features of 1188 male players competing during 2015–2017 main draw Grand Slam singles events were collected. Height, weight, experience, handedness and backhand style were used to automatically classify players into different clusters through unsupervised learning model. Afterwards, 29 match variables were analysed through MANOVA and discriminant analysis in order to evaluate the different match performance among player groups and to identify the key performance indicators that best differentiate player clusters in each Grand Slam. The analysis revealed the existence of four clusters, they were classified as Big-sized Right Two-handed Players (n?=?387), Medium-sized Right One-handed Players (n?=?265), Small-sized Right Two-handed Players (n?=?414), and Left Two-handed Players (n?=?122). Serve, winner, net and physical performance-related indicators (Structure Coefficient?≥?|0.30|) were showed to be the maximum contributors to the group separation. Left-handed players were the most homogenous group in performance. Taller players outperformed their peers in all Slams except for Roland Garros, where left-handed players demonstrated certain advantage playing on slow-pace surface. In Wimbledon and US Open, Medium-sized Right One-handed Players showed better net and physical performance. The advantage of left-handed player is over-represented at elite level. Current findings promote a better understanding of match-play from distinct player groups and offer information on evaluating contextual variability for achieving better performances.  相似文献   

4.
This paper theorizes how knowledge of indigenous tribal epistemologies was made ‘knowable’ through Enlightenment rationalism in an early colonial context. Specifically, the paper determines how and what knowledge of Mäori tribal physical activities was interpreted and authenticated through early travellers' tales and missionaries’ accounts in New Zealand. The central thesis argues that what was established as authentic and truthful aligned with Enlightenment rationalism, while those Mäori physical practices incomprehensible to Western understandings were deemed inauthentic and, consequently, were obscured and/or discarded. Throughout, the article theorizes the translation of knowledge into meaningful Western discourses and how these translations came to be crystallized in the colonial imagination.  相似文献   

5.
Abstract

The academy has not been a safe haven for Indigenous bodies, nor the epistemologies, methodologies, and practices we bring into such spaces. The omission of Indigenous views from standard historical accounts was (and remains) an essential part of asserting colonial ideologies and to the mission of colonization. There is much work to be done in the field of sport history and as an Indigenous person and sport historian, I hope to contribute to the rewriting and rerighting of sport history, in support of the larger process of decolonization. Indigenous studies is a place where I can engage in practices premised on reciprocal responsibilities, and it is a space where I feel there are substantial and urgent contributions to be made.  相似文献   

6.
Background: For years researchers have been engaged in revealing the impact of the hidden curriculum in physical education (PE) on students’ participation and non-participation. The hidden PE curriculum encompasses the knowledge, the relations, the assumptions, the norms and the beliefs that students unconsciously and unintentionally learn through the process of education. As the hidden curriculum reinforces particular values and attitudes among students in a very subtle and often unnoticed fashion, it limits students’ possibilities for becoming aware of, and thus reporting, how the tacit messages communicated through the hidden curriculum impact on their position of participation and non-participation. Thus, in this article, we argue that examining students’ silences, that is the things students do not voice, is significant for the understanding of the impact of the hidden curriculum on students’ participation and non-participation in PE.

Purposes: In this article, we aim to develop insight into students’ silences in order to elucidate how aspects of the hidden curriculum serve to reinforce some students’ non-participation in PE. Much attention has been devoted to particular values and attitudes unintentionally transmitted by teachers in PE. However, in this article, we examine how the everyday exchanges between the students themselves may also convey a hidden set of meanings, that impact on students’ actual experiences of the PE curriculum, and thus mitigate the intended effects of students’ participation.

Research design: The backdrop for this article is a single-case study carried out in a multi-ethnic and co-educational secondary school in Denmark from January to December 2014. The article draws on material collected through focus group interviews with 7th grade students (including participant-diagrams filled out by students) along with observations of their PE classes. The observations took place once a week throughout the whole calendar year.

Findings: In the article, we point to students’ intentional silences that are highly reflective of the normative expectations negotiated within the peer group. In addition, we show that the pressures toward social conformity have a direct impact on the positions of non-participation intentionally taken up by some of the less socially respected students in PE. These students were highly aware that how they behaved in PE and what they voiced in the interviews might have consequences for their peer group connections within PE and for their social reputation among peers outside of PE. In addition, we add to the current literature on student silence by pointing to a category of non-privileged silences. These silences revealed that a minor group of students were not aware of or had not recognized their position as non-participants in PE. Moreover, they appeared unable to imagine that things could be different and to voice a desire for change.

Conclusions: We argue that our findings reveal critical aspects of students’ non-participation that would be difficult to access if we did not listen to, hear and attempt to understand students’ silences. In order to extend the knowledge base on students’ participation and non-participation in PE, we hope that this article may also encourage other researchers to let students’ silences breathe and speak.  相似文献   


7.
With governments in many western countries implementing sport policy programmes directed at increasing levels of participation, stress is being placed on the capacity of sport systems to provide sufficient numbers of appropriately accredited officials. However, with declining numbers of officials, particularly early career officials, sport organisations are also facing management problems in relation to the retention of existing officials. Using a quasi-experimental 2 × 2 field-based research design this study explored the efficacy of organisational support aimed at increasing retention of early career sports officials. The research addressed two questions: (1) Do stressors of officiating, commitment and organisational support predict the intention of early career officials to continue officiating? and (2) What is the efficacy of organisational support in increasing the intention of early career officials to continue officiating? The results support previous research that stressors and commitment explain intention to continue. Intention to continue was found to be a stable construct that was not influenced by an organisational support programme. Despite significant zero-order relationships between organisational support and intentions to continue, organisational support explained no additional or unique variance above that explained by commitment and stressors of officiating. The results provide the basis for further research as well as insights for developing organisational support and retention strategies for sports officials.  相似文献   

8.
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9.
The aim of this study was: (i) to group basketball players into similar clusters based on a combination of anthropometric characteristics and playing experience; and (ii) explore the distribution of players (included starters and non-starters) from different levels of teams within the obtained clusters. The game-related statistics from 699 regular season balanced games were analyzed using a two-step cluster model and a discriminant analysis. The clustering process allowed identifying five different player profiles: Top height and weight (HW) with low experience, TopHW-LowE; Middle HW with middle experience, MiddleHW-MiddleE; Middle HW with top experience, MiddleHW-TopE; Low HW with low experience, LowHW-LowE; Low HW with middle experience, LowHW-MiddleE. Discriminant analysis showed that TopHW-LowE group was highlighted by two-point field goals made and missed, offensive and defensive rebounds, blocks, and personal fouls; whereas the LowHW-LowE group made fewest passes and touches. The players from weaker teams were mostly distributed in LowHW-LowE group, whereas players from stronger teams were mainly grouped in LowHW-MiddleE group; and players that participated in the finals were allocated in the MiddleHW-MiddleE group. These results provide alternative references for basketball staff concerning the process of evaluating performance.  相似文献   

10.
Based on the job demands–resources model, the study developed and validated an instrument that measures physical education teachers’ job demands–resources perception. Expert review established content validity with the average item rating of 3.6/5.0. Construct validity and reliability were determined with a teacher sample (n = 397). Exploratory factor analysis established a five-dimension construct structure matching the theoretical construct deliberated in the literature. The composite reliability scores for the five dimensions range from .68 to .83. Validity coefficients (intraclass correlational coefficients) are .69 for job resources items and .82 for job demands items. Inter-scale correlational coefficients range from –.32 to .47. Confirmatory factor analysis confirmed the construct validity with high dimensional factor loadings (ranging from .47 to .84 for job resources scale and from .50 to .85 for job demands scale) and adequate model fit indexes (root mean square error of approximation = .06). The instrument provides a tool to measure physical education teachers’ perception of their working environment.  相似文献   

11.
We surveyed researchers in the health and exercise sciences to explore different areas and magnitudes of bias in researchers’ decision making. Participants were presented with scenarios (testing a central hypothesis with p = .06 or p = .04) in a random order and surveyed about what they would do in each scenario. Participants showed significant bias in deciding to randomize additional participants when p = .06 (24.5%) compared to when p = .04 (6.5%), χ2 = 19.86, odds ratio (OR) = 13.5. Based on this bias to randomize additional participants, we present statistical simulations showing the cumulative negative effect this bias has on the false positive rate for a field. While it is important for researchers to have flexibility in their data-processing decisions, there is a cost/benefit trade-off to experimenter degrees of freedom and it is important that these decisions be unbiased. These data highlight the importance of a priori analysis plans in research.  相似文献   

12.
Abstract

In the wake of the United States Supreme Court ruling legalizing gay marriage nationwide, social media reflected a range of support and dissent. US Soccer posted a photo featuring an eagle and the phrase ‘One Nation, One Team’ in rainbow font on their official social media accounts. This paper explores the reaction to those posts by social media users. We examined comments made about the post and, using elements of grounded theory, found five themes emerge: (1) resistance to the intertwinement of politics and sport and pushback to that resistance; (2) patriotism/nationalism; (3) the symbolic importance of out gay players, coaches and fans; (4) general negative comments; and (5) general positive comments. We contextualize these themes in light of (1) the tension around the role of politics in sports, (2) US Soccer’s historical heterosexism and its manifestations and (3) the changing landscape of women’s sports in regards to homosexuality.  相似文献   

13.
The purpose of this paper is to reflect on what appears to be the relatively under-used methodologies associated with oral history – principally the interview as a primary source of data – in the writing of sports history. The observation is acknowledged as one made from a UK perspective, not least on account of the authors’ status as monolingual researchers, albeit from the different but culturally diverse nations of England and Scotland. The points of reference within this article are, therefore, necessarily drawn from works published in English, and the substantive oral history case studies are mostly sampled from those researched in the UK to date, chosen because they are either groundbreaking or illustrative of the opportunities, methodological challenges and politics that have come to be associated not only with the method itself, but the discipline of sports history. This paper will, therefore, firstly outline the development of oral history. Secondly, it will discuss the ways in which it has been applied within British sports history and, finally propose opportunities it presents for the future development of the discipline and those historians researching sport.  相似文献   

14.
Despite claims that local and transnational supporters in the English Premier League (EPL) may be closer to each other in terms of commitment and ‘authenticity’, than often imagined, our knowledge about how transnational fans, as one of EPL’s global components, responds to other global developments in the league is limited, given what is known about traditional fans’ meeting with EPL’s ‘global powers’. This research investigates perspectives and attitudes of transnational fans; a set of Norwegian Liverpool supporters, and their experiences of the club’s ‘foreign’ ownership, as articulated on an interactive message board. Crucially, whereas the attitudes towards ownership are mixed, the findings suggest an adoption of ‘traditional’ fan cultures, and reinforce claims that local and transnational fan cultures perhaps are closer, and display more similarities, than imagined. Certain findings also strengthen the argument sustaining that ‘authentic’ fandom should not solely be seen in terms of geographical origins or presence inside stadiums.  相似文献   

15.
This paper explores the importance soccer can play in the lives, identities and memories of migrants by drawing on 32 oral history interviews conducted with Italians who settled in Sydney in the 1950s and 1960s. Sport can provide an illuminating lens for analysing the experience of migrants, because not only are sports sites of individual, regional, national and transnational identities, they can also facilitate social inclusion or, conversely, become sites of exclusion. Soccer in Australia is often celebrated as a multicultural game. At the same time, the expressions of the complex histories of migration, colonialism, exploitation and racial and ethnic discrimination that have shaped the game have often been silenced. The interviews show that soccer has been a key site of negotiation, agency and at times resistance for first and second generation migrants. We also argue that, while it is the de-ethnicisation of soccer that has understandably dominated media, political and academic debate, the concern of these migrants in recent years has been mostly with the loss of memory and with the removal of an important history made of shared relationships and bonding experiences.  相似文献   

16.
BackgroundDuring human locomotion, a sufficiently stiff foot allows the ankle plantar flexors to generate large propulsive powers. Increasing foot stiffness (e.g., via a carbon plate) increases the ankle's external moment arm in relation to the internal moment arm (i.e., increasing gear ratio), reduces plantar flexor muscles’ shortening velocity, and enhances muscle force production. In contrast, when activation of the foot's intrinsic muscles is impaired, there is a reduction in foot and ankle work and metatarsophalangeal joint stiffness. We speculated that the reduced capacity to actively control metatarsophalangeal joint stiffness may impair the gearing function of the foot at the ankle.MethodsWe used a tibial nerve block to examine the direct effects of the intrinsic foot muscles on ankle joint kinetics, in vivo medial gastrocnemius’ musculotendinous dynamics, and ankle gear ratio on 14 participants during maximal vertical jumping.ResultsUnder the nerve block, the internal ankle plantar flexion moment decreased (p = 0.004) alongside a reduction in external moment arm length (p = 0.021) and ankle joint gear ratio (p = 0.049) when compared to the non-blocked condition. Although medial gastrocnemius muscle–tendon unit and fascicle velocity were not different between conditions, the Achilles tendon was shorter during propulsion in the nerve block condition (p < 0.001).ConclusionIn addition to their known role of regulating the energetic function of the foot, our data indicate that the intrinsic foot muscles also act to optimize ankle joint torque production and leverage during the propulsion phase of vertical jumping.  相似文献   

17.
My goal in this article is to give a portrait of how modern sport philosophy, which started in 1972, developed from relatively narrow paradigmatic borders to become a diverse and multi-paradigmatic international discipline. This development has included several changes but also some continuity. I identify three main tenets that may be viable in the future. One is to focus on the traditional sport philosophical paradigm, which had an ambition to identify the essence of sport. A second option is to develop more specific approaches, focusing on single sports or types of sport, like football or climbing. A third alternative is to develop a philosophy, not only of sport but of ‘homo movens’, studying the moving human being in different environmental and socio-cultural contexts. All three options are viable and should be welcomed.  相似文献   

18.
《Sport Management Review》2020,23(5):964-977
The purpose of this study was to examine the relationships among coaches’ authentic leadership and athletes’ psychological capital (PsyCap), performance satisfaction, and psychological well-being. The authors recruited 224 athletes participating in intercollegiate athletics in the United States. The results indicated that the authentic leadership of the head coaches positively influenced the athletes’ PsyCap levels. The enhanced PsyCap, in turn, positively influenced both performance satisfaction and psychological well-being. The interaction effect of student development was found in the relationship between authentic leadership and PsyCap. The findings contribute to an improved understanding of a head coach’s authentic behaviors in sport teams, and also illuminate how athletes’ performance satisfaction and psychological well-being can be augmented by PsyCap enhancement.  相似文献   

19.
This article underlines some key traits in the make-up of postmodern footballers. Specifically, we discuss the changes in celebrating goals as sporting events in recent years. We contribute a new perspective on the birth of the postmodern ‘me-event’ compared with the ‘goal-event’ typical of modern times. To support our contribution empirically, we use two methodological dimensions: the discourse analysis of international football legislation and photographic and video archive to illustrate the diversity of phenomena with hermeneutic sampling criteria. The differences between the modern and postmodern way of celebrating a goal, individually and/or collectively, highlight a process of social change in which the individual way of celebrating advances rapidly in a society where there is ever greater media coverage and commercialism.  相似文献   

20.
Abstract

Rugby played an influential role in assisting South Africa’s Afrikaners to migrate to the British colonies of Southern and Northern Rhodesia while maintaining strong transnational ties with their country of origin. The focus of this investigation is on the period immediately after the Second World War although it is necessary to locate events within wider social and political developments that shaped societies in the two Central African colonies. For the first half of the twentieth century the Southern Rhodesian government in particular pursued a policy of deliberately limiting the immigration of the Afrikaner, a white population group of Dutch, French or German descent. The British feared the growing strength of Afrikaner nationalism whilst the majority of Rhodesians did not wish to be absorbed by their powerful neighbour. There was nevertheless a shared passion for rugby which was clearly apparent in Rhodesia’s long-established affiliation to the South African parent body. This meant that Rhodesia not only played as a province of South Africa but the highest ambition of their players was to achieve Springbok selection. The linkages were welcomed on both sides with Afrikaans-speaking players strengthening Rhodesian rugby teams in the course of seeking their fortunes in the tobacco and copper industries.  相似文献   

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