Different centre of pressure patterns within the golf stroke II: Group-based analysis

Abstract

Although the golf coaching literature stresses the importance of weight transfer during the swing, research has been conflicting or lacking statistical support. A potential problem with previous studies is that no attempt was made to account for different movement strategies in the golf swing. This study evaluated the relationship between centre of pressure measures and club head velocity within two previously identified swing styles, the “Front Foot” and “Reverse” styles. Thirty-nine Front Foot golfers and 19 Reverse golfers performed swings with a driver while standing on two force plates. From the force plate data, centre of pressure displacement, velocity, range, and timing parameters were calculated. Correlation and regression analysis indicated that a larger range of centre of pressure and a more rapid centre of pressure movement in the downswing was associated with a larger club head velocity at ball contact for the Front Foot group. For the Reverse golfers, positioning the centre of pressure further from the back foot at late backswing and a more rapid centre of pressure transfer towards the back foot at ball contact was associated with a larger club head velocity at ball contact. This study has highlighted the importance of identifying different movement strategies before evaluating performance measures, as different parameters were found to be important for the Front Foot and Reverse styles.     

Taxonomy of golf putting: Do different golf putting techniques exist?

Abstract

This study is a preliminary investigation into the use of cluster analysis to determine if different putting techniques existed in a group of club level golfers.

Putting at a hole 4?m away, the performances of 34 experienced golfers (age 55.3?±?17.8 years and handicap 15.3?±?6.9, range 3–27) were analysed using putter head kinematic and centre of pressure data. Two distinct putting techniques were identified (named as Arm putting and Body putting), this being the first time different putting techniques have been reported in the research literature. These techniques were defined by parameters related solely to movement of the centre of pressure along the line of the putt. Some players (17 of 34) moved between techniques when performing their putting trials. Neither technique produced more accurate putt results (P?=?0.783).

Putting technique was further analysed after grouping players according to handicap (similar skill level) or accuracy (similar putting performance). The lack of significant findings when players were re-analysed according to handicap or accuracy highlights the importance of the correct methodological approach to detecting technique differences.     

Do they want it? Do they use it? The ‘Demand-Side’ of e-Government in Australia and New Zealand

Drawing on 435 telephone interviews in Australia and 498 in New Zealand, this paper investigates the ‘demand’ side of e-government. That is, we examine the use of and support for e-government measures. Whilst respondents were generally supportive of e-government on a number of measures, we find that the majority were reluctant to use some of the more sophisticated ‘transactional’ e-government measures, and less than half had even visited a government website. High users of information and communications technologies (ICT) were more likely to use e-government measures, and are more positive towards e-government in general across several measures. Similar to a number of U.S. studies, we find a ‘digital divide,’ where older age, and less education were associated with lower ICT and e-government use and support. Income level was not a statistically significant predictor in all cases however, and gender was not significant for e-government support.     

Measurement of active drag during crawl arm stroke swimming

In order to measure active drag during front crawl swimming a system has been designed, built and tested. A tube (23 m long) with grips is fixed under the water surface and the swimmer crawls on this. At one end of the tube, a force transducer is attached to the wall of the swimming pool. It measures the momentary effective propulsive forces of the hands. During the measurements the subjects' legs are fixed together and supported by a buoy. After filtering and digitizing the electrical force signal, the mean propulsive force over one lane at constant speeds (ranging from about 1 to 2 m s-1) was calculated. The regression equation of the force on the speed turned out to be almost quadratic. At a mean speed of 1.55 m s-1 the mean force was 66.3 N. The accuracy of this force measured on one subject at different days was 4.1 N. The observed force, which is equal to the mean drag force, fits remarkably well with passive drag force values as well as with values calculated for propulsive forces during actual swimming reported in the literature. The use of the system does not interfere to any large extent with normal front crawl swimming; this conclusion is based on results of observations of film by skilled swim coaches. It was concluded that the system provides a good method of studying active drag and its relation to anthropometric variables and swimming technique.     

Education in the interregnum: an evaluation of Zygmunt Bauman’s liquid-turn writing on education

In his liquid-turn writings, Zygmunt Bauman has come to identify liquid modernity as a period of interregnum. Education has a central role to play within the contemporary interregnum by opening up a new public sphere for dialogue. However, the processes of liquefaction manifest themselves in conditions that severely limit a person’s ability to exercise their human agency. Bauman provides no indication of how the educators can escape the processes that limit agency, nor does he explain how educators can combat the seductive consumerism that students need to overcome before they can engage in a reconstruction of the public sphere.     

Using Conjunctive Methods to Explore Factors Associated with On-Time Grade Attainment Among High Risk Youth

This study examines risk and protective factors associated with on-time grade attainment among a cohort of high risk elementary age youth 3?years post truancy intervention. Conjunctive Analysis of Case Configurations was used to identify dominant subpopulation profiles and assess distinctions in the likelihood of on-time grade completion among groups with unique combinations of characteristics. Comparisons of subpopulation profiles revealed substantial contextual variability in the influence of race, gender, service completion, psychosocial risk factors, and truancy. Findings indicate race is not influential across all grades but appears to be dependent on truancy level. Although psychosocial risk factors are not present for K-3^rd profiles, they are critical among 4-5^th graders, specifically lack of motivation. Findings from this study allow practitioners to better understand risk and protective factors influencing grade progression and aids in the development of individualized case management and intervention. Findings indicate better policies are needed to address early truancy.     

Information needs analysis to inform the development of a library and information service at the Marie Curie Centre,Newcastle upon Tyne,England

In the summer of 1997 the Marie Curie Centre, Newcastle approached the libraries of the Universities of Newcastle and Northumbria at Newcastle to assist in developing a library and information service (LIS) strategy. It was acknowledged that before the LIS strategy could be established preparatory investigation was needed to ensure the effective and efficient allocation of resources. A user needs analysis was conducted over a 3‐month period, including a literature search, questionnaire and interviews. The findings, which indicated that the appointment of a professional librarian was crucial, have ensured that the LIS being developed is underpinned by a strong evidence base.     

Connecting knowledge(s) to practice: a Bernsteinian theorisation of a collaborative coach learning community project

Collaborative action learning was undertaken in response to the growing criticisms of formal coach education. Since it is strongly felt that we can no longer merely commentate on what is not happening in terms of coach learning, a key requirement now is to demonstrate there are other options. The Coach Learning and Development (CLAD) programme was devised and implemented at a community rugby club in Wiltshire, England. The CLAD programme supported volunteers to engage more with contemporary designs for learning, acknowledging a fundamental problem with formal coach education in the way learning (and knowledge) is decontextualised. The theoretical endeavours of Basil Bernstein are introduced to Sport Coaching Research (SCR) for the first time, specifically the ‘pedagogical device’ to illustrate a process of recontextualisation. Findings suggest that the CLAD programme was successful in encouraging coaches to engage with more positive forms of coaching pedagogy. Therefore, the findings draw on the pivotal outcomes of the CLAD programme to re-configure more successful outcomes for coach education, coach learning and volunteers rights to knowledge.