Information-based regulation of high-velocity foot-targeting tasks

Judging time-to-contact with a target is an important criterion for avoiding harm in everyday walking and running tasks, and maximizing performance in high-velocity sporting tasks. The information-based regulation of step length and duration during target-directed locomotion was examined in relation to gait mode, approach velocity, target task, expertise, and sporting performance during a series of four experiments. The first three experiments examined novice performers (Each n=12, 6 males, 6 females), whilst the last experiment examined expert gymnasts (n=5). Two reference strips with alternating 50cm black and white intervals were placed on either side of the approach strip for all of the experiments. One 50Hz-panning video camera filmed the approach from an elevated position. In Experiment 4, two stationary 250Hz cameras filmed the post-flight performance of the gymnastic vaults and, in addition, two qualified judges provided a performance score for each vaulting trial. The panning video footage in each experiment was digitized to deduce the gait characteristics. In Experiment 4, the high-speed video footage was analyzed three-dimensionally to obtain the performance measures such as post-flight height. The utilization of visual stimulus in target-directed locomotion is affected by the observer's state of motion as characterized by the mode of locomotion and also often the speed of locomotion. In addition, experience plays an important role in the capacity of the observer to utilize visual stimulus to control the muscular action of locomotion when either maintaining or adjusting the step mechanics. The characteristics of the terrain and the target also affect the observer's movement. Visual regulation of step length decreases at higher approach speeds in novice performers, where as expert performers are capable of increasing visual regulation at higher approach speeds. Conservatism in final foot placement by female participants accounts for the observed increase in distance from the critical boundary of the obstacle relative to toe placement. Behavioural effects of gender thus affect the control of final foot placement in obstacle-directed locomotion. The visual control of braking in target-directed locomotion is described by a tau-dot of-0.54. When tau-dot is below -0.54 a hard collision with the obstacle will occur, however, when tau-dot is above -0.54, a soft collision with the target will occur. It is suggested that the tau-dot margin defining the control of braking reveals the braking capacity of the system. In the target-directed locomotion examined a tau-dot greater than -0.70 would possibly exceed the braking capacity of the system, thus, leading to injury if performed. The approach towards the take-off board and vaulting horse in gymnastics is an example of target-directed locomotion in sport. Increased visual regulation of the timing and length of each step is a requirement for a fast running approach, a fundamental building block for the execution of complex vaults in gymnastics. The successful performance of complex vaults in gymnastics leads towards a higher judge's score. Future research suggestions include an investigation of visual regulation of step length in curved target-directed locomotion.

Exploring the dynamics of accountability relationships : a grounded theory approach

Examines accountability relationships within the organisational context of a local council. Results indicate that accountability is an intensely personal, complex, and context-bound phenomenon. A framework of accountability is suggested, linking the context and characteristics of accountability relationships with particular cognitive and emotive accountability outcomes.

Socioeconomic influences on women's eating behaviours

This thesis investigated the socioeconomic influences on women's eating behaviours. Results showed that women of low socioeconomic position not only perceived higher direct financial costs as a predominant barrier for consuming a healthy diet, but also a number of indirect or non-financial cost factors such as the perceived additional time costs involved in preparing and cooking healthy foods.

Relationship between academic achievement and co-curricular involvement

Girls should increasingly participate in the health benefits of team sports learning opportunities. Boys need to not neglect academic learning goals in favour of team sports rewards that are highly valued by peers. Co-curricularly disengaged boys need to participate in co-curricular learning activities that provide opportunities for boys to succeed.

Technology effecting interorganisational relationship formation

This thesis examined the effect of emerging broadcasting technology on the formation of interorganisational relationships (IORs) between Australian-based professional football clubs and sport broadcasters. While six preconditions for IOR formation were identified, the clubs and sport broadcasters seek to retain a league-regulated environment.

Exercise dependence and elite Australian athletes

This thesis provides an examination of exercise dependence (EXD) among elite Australian athletes. The research identifies the main symptoms of EXD among elite athletes as excessive training, withdrawal, and continuance behaviours. EXD was found to be associated with irrational beliefs relating to training, low self esteem, and limited social support. The portfolio presents four case studies illustrating the use of solution focused brief counselling with athletes and drawing attention to the utility of a solution focused approach as an effective tool in sport psychology consultancy.

The presentation of gendered selves in everyday friendship

This thesis explores the gender differences in the way men and women conduct themselves in everyday friendship interaction, finding that the informal rules governing friendship interaction allow individuals a level of freedom to enact gender to extremes in the company of friends. Generational changes in men's friendships are also noted.

A critical sociological perspective on harm minimisation

This text concentrates on the political factors and forces which determine government illicit drug policies. Provides relevant case study and source material which is used to analyse the influence of ideas and ideologies around the causation of illicit drug use, and potential solutions and impact of different local interest lobbies.

Quality of life improvements after sports injury

Over the past decade, there has been an increase in available data describing the incidence of sports injuries. However, the outcomes of such injuries remain relatively undocumented. Psychological aspects of sports injury rehabilitation have been documented in elite athletes but not in cohorts of general sports participants. The few studies that have described the financial costs of sports injuries have typically not assessed how these injuries affect quality of life. Despite recent estimates that lost quality of life accounts for 81% of total sports injury costs,1 this has received relatively little attention in the literature. The aim of this paper is to describe the quality of life outcomes associated with sports injuries and to present some preliminary observations about how these change over a six-week period.

From local to national: aspects of mapping the welfare third sector in Australia

The paper charts the authors' research experiences in various types of sociological mapping ofc ommunity or third sector organisations. Specifically this was a search for a way of understanding how third sector organisations dealing with welfare issues were operating in Australia in the mid I990s.

The paper tells the story of how the researchers worked through the implications of being faced initially with a dearth of information about their subject and of how lessons were learnt about the disjunctions between what is formally given as textbook knowledge about research practice and what actually can and does happen: that is, the relationship between the theory and the practice of research.

In discussing the creation of a database of organisations, conducting focus groups and a national sample survey, the paper comments on some of the practical problems facing third sector researchers as well as looking at concept generation and typology building as analytical tools.

Who speaks on footballers and sexual assault? A gender analysis of sports reporting

The recent spate of sexual assault allegations made against Australian Football League (AFL) players has generated intense media scrutiny and public concern. Following from similar highly publicised allegations directed at the National Rugby League, these incidents have engendered significant debates around sexism and football culture in the popular press. It is the media’s response to allegations of sexual assault made against AFL footballers that will be analysed here. This study offers a content analysis of articles from the sport sections of two major Australian newspapers, The Age and the Herald-Sun, with the aim of assessing the prevalence of women’s perspectives on the issue of player misconduct and whether the gender of the reporter has any bearing on gender stereotyping in sport reporting. By assessing how the phenomenon of player misconduct has been covered in sport news, this paper evaluates the media’s role in changing dominant attitudes and perceptions of gender relations in Australian society.

Sports training, science and class among British amateur athletes in the mid to late nineteenth century

Organised amateur sports emerged in the second half of the nineteenth century. This paper, an exercise in historical sociology, analyses how a new system of sports training was devised by the amateurs to meet their particular needs. The data comes from contemporary British training manuals and the analysis is informed by the theories of Bourdieu and Foucault. That amateurs came from the higher social classes was highly
significant: it meant that they could not adopt existing training practices because these were associated with plebeian professional athletes. For amateurs to have followed the preparation of the professionals would have placed their bodies under the control of a social inferior and promoted a somatic shape more in keeping with the lower than with
the higher social orders. Mirroring the social distance between them, amateurs came to stridently reject professional training practices. Instead, they devised new training techniques which were justified through recourse to contemporary bio-medical knowledge. It is argued that amateur training originated for social reasons, with the proponents’ class positions and social capital facilitating the evocation of scientific knowledge as a legitimating ideology.

The painful nonruptured tendon : clinical aspects

Tendon injuries account for a substantial proportion of overuse injuries in competitive and recreational sports participants, as well as in individuals whose jobs require repetitive activity. Overuse type injuries account for 30% to 50% of all sports injuries, and in many endurance and power sports tendon injuries are clearly the most frequent reason for interruptions to training and competition [1] . Because tendon problems are so common, and not easily managed, this issue of Clinics is devoted to them. This article aims to provide an understanding of the pathology underlying the conditions before outlining current evidence for clinical assessment and treatment of tendinopathies.

The body, mind and soul of AFL footballers: tales of identity from the global sports entertainment industry

The paper discusses some of the findings of a research project funded by the Australian Football League (AFL) titled: Getting the Balance Right: Professionalism, Performance, Prudentialism and Playstations in the Life of AFL Footballers. The research explored the emergence and evolution of a professional identity for AFL footballers – an identity that has many facets including the ideas that a professional leads a balanced life, and has a prudent orientation to the future, to life after football. The AFL is a high profile, sports entertainment business in which brand relationships between the industry and its sponsors generate substantial income for the League, for Clubs, and for Coaches and players. In addition the AFL’s equalisation policies tightly regulate the ways in which Clubs can recruit, maintain and develop playing lists. In this context various tools of analysis are used to identify and characterise the particular Body, Mind and Soul elements of the young men who might be recruited to a Club; who might have significant time, money and effort invested in their development (as players, as persons); who might develop an identity as an AFL footballer. Drawing on Foucault’s work on the care of the self we argue that in this situation, narratives of identity necessarily involve a struggle for the Body, Mind and Soul of these young men.