Training the inspiratory muscles improves running performance when carrying a 25 kg thoracic load in a backpack

Load carriage (LC) exercise in physically demanding occupations is typically characterised by periods of low-intensity steady-state exercise and short duration, high-intensity exercise while carrying an external mass in a backpack; this form of exercise is also known as LC exercise. This induces inspiratory muscle fatigue and reduces whole-body performance. Accordingly we investigated the effect of inspiratory muscle training (IMT, 50% maximal inspiratory muscle pressure (P_Imax) twice daily for six week) upon running time-trial performance with thoracic LC. Nineteen healthy males formed a pressure threshold IMT (n?=?10) or placebo control group (PLA; n?=?9) and performed 60?min LC exercise (6.5?km?h^–1) followed by a 2.4?km running time trial (LC_TT) either side of a double-blind six week intervention. Prior to the intervention, P_Imax was reduced relative to baseline, post-LC and post-LC_TT in both groups (pooled data: 13?±?7% and 16?±?8%, respectively, p?P_Imax increased +31% (p?TT (+18%, p?P_Imax at each time point was unchanged (13?±?11% and 17?±?9%, respectively, p?>?.05). In IMT only, heart rate and perceptual responses were reduced post-LC (p?p?相似文献   

Sociology of a scandal: the emergence of ‘FIFAgate’

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.     

Is hockey just a game? Contesting meanings of the ice hockey life projects through a career-threatening injury

This study is situated within an existential–narrative theoretical framework to examine the impact of career-threatening injury on professional ice hockey players’ well-being and career construction. Professional ice hockey culture is construed as a privileged space characterised by hegemonic masculinity, fierce competition as well as high-risk behaviours often resulting in sports injuries. In this paper, we analyse two players’ life stories with a particular focus on injury as a boundary situation involving social and temporal breakdown and re-evaluation of meaning of sporting life projects. Emergent narratives surrounding existential themes of loss of meaning and loneliness in the face of injury were analysed in connection with players’ search for authenticity and realignment with self-concept. Each player developed resistant narratives to the dominant ethos of professional sport in order to restore well-being and sense of self. The relational aspects of injury are highlighted in practical recommendations.     

From a pub game to a sporting spectacle: the professionalisation of British Darts, 1970–1997

ABSTRACT

Various sport scholars have noted the transition of sports from amateur leisure pastimes to professionalised and globalised media sporting spectacles. Recent developments in darts offer an excellent example of these changes, yet the sport is rarely discussed in contemporary sports studies. The only sustained theoretical research on darts focuses primarily on the origins of the sport in its nostalgic form as a working-class, pub taproom pastime in England. This article critically examines the transformation of darts from a leisurely game to a professional sport between the 1970s and the 1990s. The change was enabled by the creation of the British Darts Organisation (BDO) and the introduction of television broadcasting, which together fed a continual process of professionalisation. Initially, this article discusses both the concept of professionalisation and similar developmental changes in a selection of English sports. Following this, via selected interviews, documentary analysis and archival information, the reasons behind the split in darts are explicated, shedding light on how the BDO did not successfully manage the transformation and the sport split into two governing bodies, from which the Professional Darts Corporation (PDC), the sport’s most successful organisation in the present day, has emerged to dominate the world of televised darts.     

For a ‘United’ Kingdom and a ‘Greater’ Britain: the British Olympic Association and the limitations and contestations of ‘Britishness’

During the first two decades of the twentieth century, the Home-Nations of England, Scotland, Ireland and Wales joined forces in competing in the Olympic Games under the banner of ‘Great Britain’ (or deviations thereof). The Olympics served as an important symbolic site for fostering and promoting a broader ‘British’ national identity. In practice, however, the prevalence and persistence of competing national identities and allegiances roiled early attempts to create a unified British Olympic team. These counter-prevailing forces of nationalism further served to undermine the British Olympic Association's ambitious attempt to unite the British Empire in a ‘Greater Britain’ team for the 1916 Berlin Olympic Games. As this work will reveal, ‘Britishness’ was a layered, contested and racially homogenous term that was interpreted and applied differently across various parts of the British Isles and its Empire.     

Rogge’s Games: Establishing the Youth Olympic Games as a New Event in the Olympic Movement

Abstract

The Youth Olympic Games (YOG) were established as a new event in the Olympic family at a session of the International Olympic Committee (IOC) in July 2007. This paper illuminates why and how this new event was established. It turns out that the formally unanimous decision to establish the event was taken in a contested terrain. Much attention has been put on the agency of the then president of the IOC, Jacques Rogge, and his role as an institutional leader is discussed in a context where the pressure of tradition is strong. Securing the character of an organization which has become an institution is a central task for institutional leadership, and developing an ‘external mechanism’ or a new subfield like the YOG is a way to explore this. Appealing to original ideas and values, such as the educational role of the games, is of importance but would in itself not be enough to convince the fellow members of the IOC’s decision-making bodies. Acting politically as a ‘statesman’ with the skills and ability to manoeuvre among different interests and wills was equally a necessity to convince the decision makers to welcome this new event into the Olympic movement.     

Sport,Media, Politics and Nationalism on the Eve of the Spanish Civil War: The First Vuelta Ciclista a España (1935)

The Vuelta Ciclista a España, whose 75th anniversary will be celebrated in 2010, is one of the three big stage races in the world, alongside the Tour de France and the Giro d'Italia. It is arguably a major yearly sporting event with a wide popular appeal and media coverage, not only at a national level but also increasingly at a global one. Yet, unlike the Tour and the Giro, it remains unexplored from a socio-scientific perspective. This article aims, therefore, at breaking some new ground while analysing the socio-political dimension of this long-lasting, successful sporting event's first instalment in 1935, putting it against the backdrop of the turbulent Second Republic and the path leading to the Civil War. The media-confected nature of the Vuelta is highlighted, which brings it close to its fellow races of the Big Three Tours (also set up and managed by daily newspapers), but a major difference is pointed out: the first Vuelta's predominant political-ideological rationale, its overwhelming propagandistic aim put to the service of Spanish reactionary forces, compared to the mainly commercial purposes of the first Tour's and Giro's marketing-driven organizers.     

Reliability and validity of a soccer passing test using the Footbonaut

The aim of this study was to investigate the reliability and validity of a soccer short passing test using the Footbonaut training system. Forty-eight young skilled soccer players and 31 lesser-skilled soccer players completed a test and a retest, each involving four sessions a day of a Footbonaut short passing test (FSPT). We found significant differences in mean execution times for skilled (mean [M]?=?2487, standard deviation [SD] ?=?155) and lesser-skilled players (M?=?2682, SD?=?176) but no significant difference in accuracy (M?=?74.13, SD?=?7.65; M?=?72.19, SD?=?8.13) between groups. The results from linear mixed-effects models show that there were no significant effects of repeated measurements on execution time. In contrast, we found an estimated increase of 0.86% in accuracy per session for both groups. In conclusion, the FSPT offers a reliable and valid method to differentiate young soccer players at different competitive levels, using execution time.     

‘Superbowling’: Using the Super Bowl’s Yearly Commentary to Explore the Evolution of a Sporting Spectacle in the American Consciousness

Abstract

In the days following Super Bowl III, New York Times columnist Robert Lipsyte coined the phrase ‘superbowling’. Consisting of the ‘chatter’ and diverse perspectives voiced throughout the nation in the days surrounding each Super Bowl, superbowling includes the off-the-wall psychiatric evaluations and epic gloating by football fans, political reactions and sociological analyses concerning the game’s affect on the nation’s institutions, as well as the hasty generalizations by alarmed moralists and university professors. This paper utilizes the ‘superbowling’ penned between Super Bowls I and XXXVI as evidence that provides insight into ‘the variety of ways in which Americans understood and enacted their political culture at a specific time’. By investigating the varieties of superbowling topics highlighted within each yearly Super Bowl, one cannot only better understand the evolution of Super Bowl Sunday, but can also understand its relationship to the prominent historical happenings and personalities of the time. It is concluded that by the turn of the millennium, superbowling revealed at least three enduring qualities of Super Bowl Sunday: ‘conspicuous consumption’, ‘shared experience’, and ‘national holiday’.     

‘Thrash yourself Thursday’: the production of the ‘healthy’ child through a fitness-based PE practice

Saturating the Canadian landscape are media and health industry discourses representing childhood physical ‘(in)activity’ and ‘obesity’ as being at ‘epidemic’ proportion. Increasingly identified as a focus of concern within such representations is the school setting, simultaneously positioned both as a cause of and a key institutional site for redressing these ‘pathologies’. Drawing on qualitative research carried out at a Canadian elementary school, this discussion offers a Foucaultian governmental analysis of one school's navigation of this gauntlet of accountability to improve children's health. Specifically, the school-wide fitness-based initiative known as ‘Thrash yourself Thursdays’, whose objective is the production of ‘healthy’ students, is examined to understand the power relations enacted through it, and how the target of this practice (i.e. the children) negotiated such efforts to shape their bodily conduct. This in turn, offers a unique contribution to the governmental literature, which is more characterised by attending to discourses and strategies of government rather than how the subjects of such strategies respond to such efforts.     

Behind the Iron Curtain: Football as a Site of Contestation in the East German Sports ‘Miracle’

Sport is employed as a lens through which one can understand better the social and political inner workings of dictatorship. This paper treats sport as a cultural institution within GDR (German Democratic Republic) society and sets out to complement the two broad paradigms used to study East Germany: the first, a broad approach under the umbrella of ‘Cold War histories’ and ‘totalitarianism theory’, usually focusing on the few; the second, a so-called ‘histories of everyday life’ approach generally focusing on the many. Using an in-depth case study of the sport of football, the paper introduces a new paradigm: the ‘contested dictatorship’ approach. This approach rejects the broad totalitarian notion of dictatorship as applied to East Germany and shares many of the underlying assumptions of the ‘everyday history’ approach, in particular by allowing a far greater role for agency with much more room for manoeuvre for actors and institutions within the structures of an authoritarian state than ‘totalitarian’ understandings usually permit. Drawing on empirical archival material, the paper reveals the endemic rivalries between key personalities (and even large industrial enterprises expressing regional identities) in a struggle for influence over the game; rivalries between fans of GDR football teams; fan culture and hooligan behaviour as forms of self-determination; and how these issues contributed to the poor performance of football relative to other sports.     

Do the Youth Olympic Games promote Olympism? Analysing a mission (im)possible from a local youth perspective

On the basis of the Youth Olympic Games (YOG), we assess if and how the youth in the communities of the YOG host cities have been influenced concerning their perception of the Olympic values (OV) and the Olympic movement (OM). Special attention of the study is paid to the analysis of intervention mechanisms which the local youth underwent (e.g. attending the YOG on-site, participating in school programmes). Our study was conducted among 1004 adolescents living in the host region three years after the Innsbruck 2012 YOG had been staged. Our analyses extend the corresponding literature by (1) showing that the YOG and the involvement of the local youth in such an event have the power of creating an interest in the OM and its events, but do not have the power to influence the young citizens’ perception of the OV significantly; (2) illustrating that the perception adolescents have of the OV depend mainly on their socio-demographic background, their a priori interest in sports events, social capital (norms, institutional trust) and the extent to which the youngsters follow the event in the different media; and (3) corroborating the hypothesis that intervention programmes (e.g. school programmes) for promoting (Olympic) values and ideals should not be single, obligatory and isolated activities. We conclude that it is not surprising that the International Olympic Committee has reformulated the goals for the YOG in the Olympic Agenda 2020, as some goals relating to the promotion of the OV might have been a mission impossible.     

Touching the didactic contract—a student perspective on intergenerational touch in PE

A growing anxiety around intergenerational touch in educational settings has both emerged and increased in recent years. Previous research reveals that Physical Education (PE) teachers have become more cautious in their approaches to students and they avoid physical contact or other behavior that could be regarded as suspicious [Fletcher, 2013. Touching practice and physical education: Deconstruction of a contemporary moral panic. Sport, Education and Society, 18(5), 694–709. doi:10.1080/13573322.2013.774272; Öhman, 2016. Losing touch—teachers’ self-regulation in physical education. European Physical Education Review, 1–14. doi:10.1177/1356336X15622159; Piper, Garratt, & Taylor, 2013. Child abuse, child protection and defensive ‘touch’ in PE teaching and sports coaching. Sport, Education and Society, 18(5), 583–598. doi:10.1080/13573322.2012.735653]. Some also feel anxious about how physical contact might be perceived by the students. The purpose of this article is to investigate physical contact between teachers and students in PE from a student perspective. This is understood through the didactic contract. For this purpose, focus group interviews using photo elicitation have been conducted with upper secondary school students in Sweden. One of the major findings is that intergenerational touch is purpose bound, that is, physical contact is considered relevant if the teacher has a good intention with using physical contact. The main agreements regarding physical contact as purpose bound are the practical learning and emotional aspects, such as learning new techniques, preventing injury, closeness and encouragement. The didactic contract is in these aspects stable and obvious. The main disagreements are when teachers interfere when the students want to feel capable or when teachers interfere when physical contact is not required in the activity. In these aspects the didactic contract is easily breached. It is also evident that personal preference has an impact on how physical contact is perceived. In conclusion, we can say that physical contact in PE is not a question of appropriate or inappropriate touch in general, but rather an agreement between the people involved about what is expected. Consequently, we should not ban intergenerational touch, but rather focus on teachers’ abilities to deal professionally with the didactic contract regarding physical contact.     

Over the Top: ‘A Foul; a Blurry Foul!’

Part of Britain's folk memory of the First World War is of long lines of Tommies resolutely going over the top into a storm of machine gun fire and walking bravely to their deaths; following a piper if Scottish or kicking a football if English. However, rather than eventually becoming a conventional act of bravado, evidence suggests that the ‘football charge’ was limited to a 10-month period between 25 September 1915 and 1 July 1916. The most famous example is that of‘B’ Company of the 8th Battalion of the East Surreys led by Captain Nevill atthe Battle of the Somme. However, it was first performed, and possibly mostsuccessfully used, by the London Irish Rifles at the Battle of Loos on 25September 1915. This article examines what actually happened on the 25September 1915 and explores the underlying rationale of the first ‘football charge’.     

Sport as a (mere) hobby: in defense of ‘the gentle pursuit of a modest competence’

In this essay, I defend sport as a (mere) hobby in contrast to sport as a ‘mutual quest for excellence through challenge’. With the assistance of ideas found in the novel Don Quixote, I raise questions about the clarity, merit, and sufficiency of the quest-for-excellence apologetic. I employ arguments made by James and Dewey to support my alternate defense of sporting activity as a hobby, that is, as ‘the gentle pursuit of a modest competence’. Based on the work of Wu, my defense stands as both a philosophic argument and a cultural critique.     

The creatine content of Creatine Serum™ and the change in the plasma concentration with ingestion of a single dose

Three samples of Creatine Serum? ATP Advantage from Muscle Marketing USA, Inc. were assayed for creatine by two different techniques by four independent laboratories, and for creatinine by two different techniques by two laboratories. A further sample was assayed for phosphorylcreatine. Dry weight and total nitrogen were also analysed. Six male volunteers ingested in random order, over 3 weeks: (A) water; (B) 2.5?g creatine monohydrate (Cr?·?H₂O) in solution; and (C) 5?ml Creatine Serum? (reportedly containing an equivalent amount of Cr?·?H₂O). Blood samples were collected before and up to 8?h after each treatment and plasma was analysed for creatine and creatinine. Eight-hour urine samples were analysed for creatine. Ingestion of 2.5?g creatine monohydrate in solution resulted in a significant increase in plasma creatine (from 59.1±11.8?μmol?·?l^?1 to 245.3±74.6?μM μmol?·?l^?1; mean±s) and urinary creatine excretion. No increase in plasma or urinary creatine or creatinine was found on ingestion of Creatine Serum? or water. Analysis showed 5?ml of Creatine Serum? to contain <10?mg Cr?·?H₂O and approximately 90?mg creatinine. Phosphorylcreatine was not detectable and only a trace amount of phosphorous was present. Total nitrogen analysis ruled out significant amounts of other forms of creatine. We conclude that the trace amounts of creatine in the product would be too little to affect the muscle content even with multiple dosing.     

‘You don't need a degree to get a coaching job’: investigating the employability of sports coaching degree students

ABSTRACT

Though highly popular, degree-level sports coaching qualifications are in their infancy, and it remains that ‘an individual intending to become an accredited coaching practitioner can only do so by undertaking their sport's national governing body (NGB) coaching award(s)’ [Nelson et al., 2006, p. 254. Formal, nonformal and informal coach learning: A holistic conceptualisation. International Journal of Sports Science & Coaching, 1(3), 247–259]. Consequently, little is known about the development of HE sports coaching students’ employability. This study critically investigates sports coaching students’ degree-study motives, development of employability skills and perceptions of career prospects as graduates. Survey data and follow-up interviews from two U.K. post-92 universities reveal tensions between liberal and vocational philosophies of university education and concerns about the graduate labour market. Critical incidents and missed opportunities in students’ development of key skills for coaching during and outside of university are also discussed.     

The Hand of God,the Hand of the Devil: a sociological interpretation of Maradona’s hand goal

Based on the moral problem of Maradona’s goal, known as the ‘Hand of God’, this essay presents a theoretical discussion using the perspective of figurational sociology of how game rules and moral rules are related. It does not aim to solve the moral dispute occasioned by actions like the ‘Hand of God’, but concentrates on a much more limited discussion (appealing to far fewer people) in which we strive to reach a proper sociological understanding. Indeed, we believe that the ‘Hand of God’ is a paradigmatic event for sociological reasoning. This is not to claim that sociology can give any final answers, but to suggest the opposite, namely that an understanding of the value of ‘hand goals’ can be very important for understanding the limits of sociological reason.     

An accurate estimation of the horizontal acceleration of a rower’s centre of mass using inertial sensors: a validation

For a valid determination of a rower’s mechanical power output, the anterior–posterior (AP) acceleration of a rower’s centre of mass (CoM) is required. The current study was designed to evaluate the accuracy of the determination of this acceleration using a full-body inertial measurement units (IMUs) suit in combination with a mass distribution model. Three methods were evaluated. In the first two methods, IMU data were combined with either a subject-specific mass distribution or a standard mass distribution model for athletes. In the third method, a rower’s AP CoM acceleration was estimated using a single IMU placed at the pelvis.

Experienced rowers rowed on an ergometer that was placed on two force plates, while wearing a full-body IMUs suit. Correspondence values between AP CoM acceleration based on IMU data (the three methods) and AP CoM acceleration obtained from force plate data (reference) were calculated. Good correspondence was found between the reference AP CoM acceleration and the AP CoM accelerations determined using IMU data in combination with the subject-specific mass model and the standard mass model (intraclass correlation coefficients [ICC] >?0.988 and normalized root mean square errors [nRMSE]?3.81%). Correspondence was lower for the AP CoM accelerations determined using a single pelvis IMU (0.877?Based on these results, we recommend determining a rower’s AP CoM acceleration using IMUs in combination with the standard mass model. Finally, we conclude that accurate determination of a rower’s AP CoM acceleration is not possible on the basis of the pelvis acceleration only.     

Quantifying the injury of the human eye components due to tennis ball impact using a computational fluid–structure interaction model

Although it might be believed that the eye only comprised a very small area of the face, its injury due to the ball impacts in different sports seems to be severe enough to entice many researchers to determine the level of injury and then attempt to minimize it. Sports-related eye injuries, especially tennis, pose a substantial and preventable problem to the eye due to the high speed of the tennis ball (69 m/s). This is why many ophthalmologists provide a wide range of information for their patients regarding the risks of eye injuries in tennis to prevent the injury to well over 100,000 eyes each year. However, so far although there are some general information regarding the injury to the human eye components due to the tennis ball impact, the details of the stresses and deformations have not been well determined. Therefore, the goal of this study was to determine the stresses and deformations of the eye components, including cornea, aqueous body, iris, ciliary body, lens, vitreous body, retina, sclera, optic nerve, extra and intraconal fats, and muscles, attributable to the tennis ball impact via a Lagrangian–Eulerian computational coupling model. Magnetic resonance imaging was employed to establish a finite element model of the human eye according to a normal human eye. The numerical results revealed the highest amount of stress in the iris (19.2 MPa), whereas the lowest one was observed in the vitreous body (1.77 Pa). The cornea also experienced the stress of 8.27 MPa which might be high enough to invoke rupture in this delicate material. In addition, the results exhibited a decreasing and increasing of the radius of curvature for the cornea and lens, respectively. Finally, the collision of the tennis ball to the eye triggered the resultant displacement of 0.045 µm in the optic nerve which may imply a non-significant injury to that. The findings of this study may have implications not only for understating the values of stresses and deformations in the human eye components but also for helping the ophthalmologists to have a more precise diagnosis about the injury position in the eye due to the tennis ball impact.