Musculoskeletal loading during the round-off in female gymnastics: the effect of hand position     

Roman Farana  Daniel Jandacka  Jaroslav Uchytil  David Zahradnik  Gareth Irwin 《Sports biomechanics / International Society of Biomechanics in Sports》2014,13(2):123-134

Chronic elbow injuries from tumbling in female gymnastics present a serious problem for performers. This research examined how the biomechanical characteristics of impact loading and elbow kinematics and kinetics change as a function of technique selection. Seven international-level female gymnasts performed 10 trials of the round-off from a hurdle step to flic-flac with ‘parallel’ and ‘T-shape’ hand positions. Synchronized kinematic (3D-automated motion analysis system; 247 Hz) and kinetic (two force plates; 1,235 Hz) data were collected for each trial. Wilcoxon non-parametric test and effect-size statistics determined differences between the hand positions examined in this study. Significant differences (p < 0.05) and large effect sizes (ES>0.8) were observed for peak vertical ground reaction force (GRF), anterior–posterior GRF, resultant GRF, loading rates of these forces and elbow joint angles, and internal moments of force in sagittal, transverse, and frontal planes. In conclusion, the T-shape hand position reduces vertical, anterior–posterior, and resultant contact forces and has a decreased loading rate indicating a safer technique for the round-off. Significant differences observed in joint elbow moments highlighted that the T-shape position may prevent overloading of the joint complex and consequently reduce the potential for elbow injury.  相似文献   

Fifty interesting years     

Gareth Williams 《Perspectives: Policy and Practice in Higher Education》2013,17(2):51-55

This case study gives an analytical account of institutional development in induction provision.

Driven by student experience concerns, a London post-1992 University set up an ‘enhanced induction project’ to provide a more integrated, personalised approach through more coordinated processes. In a large, diverse context, university-wide working is problematic; issues about control and autonomy are illustrated by this action research. Significant change has been achieved in a developmental process shaped by and revealing the interplay of differing organisational cultures. Critical reflection on change management, from practice and strategy to policy and embedding, draws on a range of work on organisational cultures.  相似文献   

Whole-school management issues concerning the PE department: ‘a natural division of labour?’     

Gareth Mark Williams  Dean Williams 《School Leadership & Management》2013,33(5):515-528

Utilising the labour ideas of Adam Smith and Emile Durkheim as a theoretical basis, the main objective of this study was to investigate the perception that Heads of Physical Education (HoPE) face unique management and leadership challenges. Results showed that HoPE believe that they are overburdened with tasks primarily involving the delegation of finance and exam administration. Many felt that their efforts were undervalued by senior management teams (SMTs). However, HoPE themselves could work more closely with the latter and instead of developing a culture of antagonism and mistrust they should seek to partake more fully within whole-school initiatives to demonstrate capabilities and so increase the status of their department.  相似文献   

Physical Education and Sustainable Development: An Untrodden Path     

Jeffrey R. Lake  Gareth Stratton  Duncan Martin  Mike Money 《Quest (Human Kinetics)》2013,65(4):471-482

This paper explores the relevance of sustainable development to physical education and argues that it is a vitally important concept that praents the opportunity for considerable theoretical and practical development. The implications of sustainability development for our understandings of physical activity are examined with recognition of the significance of activity behaviors within sustainable living. In the context of education, the development of critical curriculum theory is advocated since the potential environmental crisis necessitates profound social change. Possible avenues for the development of critical theory in physical education are identified, and physical education's possible use as a vehicle for the promotion of sustainable active living is considered. It is argued that such a focus would improve the subject's contribution toward both the promotion of active living and social transformation for sustainability.  相似文献   

Collaboration between academics and teachers: a complex relationship     

Stuart Bevins  Gareth Price 《Educational Action Research》2013,21(2):270-284

Collaboration between academics and teachers has become increasingly prevalent over recent years. Whether its aim is joint research or continuing professional development for teachers, collaboration seems to offer a realistic opportunity for reducing the perceived gap between theory and practice. However, collaboration is not merely academics and teachers working together on a common project. It is complex in nature and involves a range of requirements that must be satisfied in order to maximise the potential of the relationship. In this paper we will theorise on the nature of academics and teachers working together and suggest that a working relationship between academic researchers and teachers can be one of three models: client–supplier, a coercive relationship or a collaborative relationship. We identify and unpack specific factors that underpin collaboration and suggest a number of concrete actions to establish collaboration between academics and teachers. We draw heavily from existing literature and our own reflections on two collaborative projects with which we have recently been involved. We use data from these projects to provide a number of anecdotes from the teachers who participated to support our own reflections. Finally, we suggest that further research should investigate the different ways attempts to collaborate fail, to build a more complete sense of the problems and potential of this special relationship.  相似文献   

Equity for sale: ethical consumption in a school-choice regime     

Joel Windle  Greg Stratton 《Discourse: Studies in the Cultural Politics of Education》2013,34(2):202-213

The promotion of equity in Australian education has come to present itself to parents in ways which are shaped by the marketisation and internationalisation of schooling. This paper argues that, as in other markets, ethical consumption has become a key model for both schools as providers and parents as consumers to engage with issues of equity. We identify how the phenomenon of ethical consumption is reflected in the promotional strategies of elite private schools, and how this framing of equity occludes a clear vision of inequalities in the distribution of resources and access across different educational sites. We reflect on the extent to which outreach and service programmes in elite schools fulfil their stated goals or are self-serving.  相似文献   

The effect of a supported exercise programme in patients with newly diagnosed Type 2 diabetes: A pilot study     

Karianne Backx  Adrian McCann  David Wasley  Gareth Dunseath  Steve Luzio  David Owens 《Journal of sports sciences》2013,31(6):579-586

Abstract

The aim of this study was to examine the effectiveness of either a standard care programme (n?=?9) or a 12-week supported exercise programme (n?=?10) on glycaemic control, β-cell responsiveness, insulin resistance, and lipid profiles in newly diagnosed Type 2 diabetes patients. The standard care programme consisted of advice to exercise at moderate to high intensity for 30?min five times a week; the supported exercise programme consisted of three 60-min supported plus two unsupported exercise sessions per week. Between-group analyses demonstrated a difference for changes in low-density lipoprotein cholesterol only (standard care programme 0.01 mmol?·?L^?1, supported exercise programme –0.6 mmol?·?L^?1; P?=?0.04). Following the standard care programme, within-group analyses demonstrated a significant reduction in waist circumference, whereas following the supported exercise programme there were reductions in glycosylated haemoglobin (6.4 vs. 6.0%; P?=?0.007), waist circumference (101.4 vs. 97.2?cm; P?=?0.021), body mass (91.7 vs. 87.9?kg; P?=?0.007), body mass index (30.0 vs. 28.7?kg?·?m^?2; P?=?0.006), total cholesterol (5.3 vs. 4.6 mmol?·?L^?1; P?=?0.046), low-density lipoprotein cholesterol (3.2 vs. 2.6 mmol?·?L^?1; P?=?0.028), fasting β-cell responsiveness (11.5?×?10^?9 vs. 7.0?×?10^?9 pmol?·?kg^?1?·?min^?1; P?=?0.009), and insulin resistance (3.0 vs. 2.1; P?=?0.049). The supported exercise programme improved glycaemic control through enhanced β-cell function associated with decreased insulin resistance and improved lipid profile. This research highlights the need for research into unsupported and supported exercise programmes to establish more comprehensive lifestyle advice for Type 2 diabetes patients.  相似文献   

Measuring the impact of child protection through Activation States     

Celia H. Brackenridge  Zofia Pawlaczek  Joy D. Bringer  Claudi Cockburn  Gareth Nutt  Andy Pitchford 《Sport, Education and Society》2013,18(2):239-256

Child protection (CP) has risen to the top of the UK sports policy agenda in the past four years and the Football Association has invested in this major strategy as part of its commitment to ‘use the power of football to build a better future’ (Football Association, 2000a). Evidencing the impact of child protection is, however, a complex task, exacerbated by the dearth of measurement tools that exist for this purpose in sport. This article presents a new model of ‘Activation States’ that has been designed and used to measure shifts in football culture as child protection has begun to impact upon the sport. The model is used to map changes over time related to the knowledge, feelings, actions and discourses of key stakeholders in football. The research for which the model was designed is a longitudinal study, commissioned by the English Football (soccer) Association, on the impact of the organisation's child protection strategy on the culture of soccer. Sample data from the project are used to illustrate the model and to examine its potential and limitations as a tool for measuring impacts in child protection and other social inclusion themes.  相似文献   

Kinematic changes during learning the longswing on high bar     

Genevieve Williams  Gareth Irwin  David G. Kerwin  Karl M. Newell 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):20-33

The purpose of this study is to provide evidence of technique changes during learning a sports-specific skill, the looped bar longswing (LLS). Thirteen male participants with no previous high bar experience took part in a training study. Kinematic data were collected using a CODA motion analysis system (200 Hz) during eight weekly testing sessions. Analyses focused on the amplitude of swing and the functional phase (FP) actions, defined by the rapid flexion to extension of the shoulders and extension to flexion of the hips as the performer passed through the lower vertical. Three groups were identified based on the number of sessions it took each participant to perform the LLS (G1: most successful, G2: intermediate, and G3: least successful). All participants were able to significantly increase swing amplitude over the training period (p < 0.05). For each participant the hip FP started significantly: later for G1, earlier for G2, and did not change for G3. Extension actions at the shoulders were dissimilar to those reported for elite gymnasts performing the longswing. The FP of the hips provides a mechanism to distinguish between the learners of different skill levels. The study has provided support for a single-subject design when investigating technique changes during learning.  相似文献   

Contributions of the non-kicking-side arm to rugby place-kicking technique     

Neil Bezodis  Cassie Wilson  Gareth Irwin 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):171-186

To investigate non-kicking-side arm motion during rugby place kicking, five experienced male kickers performed trials under two conditions, both with an accuracy requirement but one with an additional maximal distance demand. Joint centre coordinates were obtained at 120 Hz during kicking trials and a three-dimensional model was created to enable the determination of segmental contributions to whole-body angular momentum. All kickers possessed minimal non-kicking-side arm angular momentum about the global medio-lateral axis. The more accurate kickers exhibited greater non-kicking-side arm angular momentum about the global antero-posterior axis. This augmented the whole-body antero-posterior angular momentum, and altered the whole-body lateral lean at ball contact. The accurate kickers also exhibited greater non-kicking-side arm angular momentum about the global longitudinal axis, which opposed the kicking leg longitudinal angular momentum and attenuated the whole-body longitudinal angular momentum. All participants increased the longitudinal angular momentum of the non-kicking-side arm in the additional distance demand condition, except for one participant whose accuracy decreased, suggesting that the longitudinal angular momentum of the non-kicking-side arm assists maintenance of accuracy in maximum distance kicking. Goal kickers should be encouraged to produce non-kicking-side arm rotations about both the antero-posterior and longitudinal axes, as these appear important for both the initial achievement of accuracy, and for maintaining accuracy during distance kicking.  相似文献