The Role of Postural Support in Young Adults’ Control of Stationary Kicking     

Ben Sidaway  Matthew Bouchard  Julie Chasse  Jonathan Dunn  Andrea Govoni  Breanne McPherson 《Research quarterly for exercise and sport》2017,88(2):215-222

Purpose: The requirement for postural stability during the performance of motor skills has been clearly demonstrated in infants, but the necessity for such a postural substrate is not well documented in adults. The present study investigated the role of postural stability during a ballistic ball-kicking task in adults by providing varying degrees of external postural support. Method: In the 1st experiment, 30 participants performed 20 maximal-velocity kicks under each of 3 conditions: grasping a rigid stable handle, light fingertip touch, and grasping a suspended elastic tube. A 2nd experiment with 16 participants varied the position of the stable handle to examine if the handle position in Experiment 1 might simply act as a fulcrum to enhance torque generation. Results: In Experiment 1, ball velocity was significantly higher in the stable-grasp condition in both men and women with the men showing greater improvement relative to the other conditions. Experiment 2 showed that the position of the stable handle did not significantly affect kicking velocity, indicating that the handle was not simply acting as a fulcrum during the kick. Conclusion: Together, the findings suggest that postural stability may be a rate limiter in the performance of dynamic motor tasks in adults.  相似文献   

Capturing the Cultural Olympiad in Scotland: the case for multi-criteria analysis     

David McGillivray  Gayle McPherson 《Cultural Trends》2014,23(1):18-28

This article examines the London 2012 Cultural Olympiad through the lens of a devolved Scotland, exploring how the Scottish cultural programmes and projects are being evaluated, and what this approach might offer for the wider UK and international context. Structurally, the article begins with a discussion of the relationship between sporting mega-events and culture, focusing specifically (although not exclusively) on the sport and cultural nexus around the Olympic Games. The discussion then moves to consider conceptual, policy and practice debates around cultural value, examining the extent to which existing research tools and techniques satisfactorily capture the contribution of culture to major events, public and social policy. Methodologically, the article draws on elite interviews with strategic stakeholders directly involved in the design, delivery and evaluation of Scotland's London 2012 Cultural Programme. The authors conclude that, when taken alongside other cultural evaluations conducted nationally and internationally, there is a need to develop a multi-criteria analysis (MCA) that can more effectively capture cultural value around major sporting events in the UK. This study has demonstrated a level of dissatisfaction within the Scottish cultural community about the limitations of existing mechanisms for measuring the value of culture within the mega-event platform. A robust, but nuanced, impact assessment is required because, unlike the UK as a whole, Scotland has a unique opportunity to undertake a longitudinal study assessing the conditions for legacy put in place as a result of the London 2012 Olympic Games for the subsequent 2014 Commonwealth Games in Glasgow. However, further research is required into the efficacy of the MCA for assessing cultural value generally and within the framework of major sports events, in particular.  相似文献   

Mapping two new points on the tennis expertise continuum: tactical skills of adult advanced beginners and entry-level professionals during competition     

McPherson SL  Kernodle M 《Journal of sports sciences》2007,25(8):945-959

Research examining problem representations of individuals during task performance is advancing our understanding of information processing and expertise in a variety of sports. However, few studies using similar methodology have been conducted on individuals of various competitive standards in one domain in similar contexts. This study examined problem representations of adult advanced beginners and entry-level professionals accessed during singles tennis competition (n = 12). These groups were selected to represent players with performance skills that were different from those studied previously (i.e. adult beginners and varsity players). Immediate recall and planning interviews were conducted between points during singles tennis competition. Players competed within their respective expertise groups. Verbal reports were transcribed verbatim and concepts were scored according to a model of protocol structure. Several multivariate analyses of variance were conducted on rank scores for measures of concept content and structure using the L-statistic. Entry-level professionals exhibited more advanced problem representations than advanced beginners regardless of interview type. These findings together with those of previous research suggest adaptations in long-term memory profiles with increases in performance skills. For example, beginners lacked action plan and current event profiles because they generated goals and reiterated game events during both interviews. Advanced beginners, who had better performance skills than beginners, exhibited rudimentary action plan profiles and deficient current event profiles because they generated and monitored several detailed actions related to the current context during recall interviews and generated only a few goals during planning interviews. In contrast, varsity players and professionals processed tactical information in the current context and beyond denoting the existence of both action plan and current event profiles. Varsity players, with inferior performance skills than professionals, exhibited fewer and less associated tactical concepts than professionals during both interviews.  相似文献   

Coping strategies and the influence of perceived parental support in junior national age swimmers     

Lafferty ME  Dorrell K 《Journal of sports sciences》2006,24(3):253-259

This study examines how national junior age group swimmers cope with poor performance and explores whether coping strategy use changes with perceptions of parental support. One hundred and four junior age group swimmers (mean age 14.2 years) completed a modified version of the COPE scale (Crocker & Issack, 1997) and the perceptions of Perceived Parental Support Scale (Van Yperen, 1995). Results showed that the swimmers in this sample used a mixture of behavioural and cognitive strategies with an emphasis upon individual or internally focused approaches. When analysing coping strategies and perceptions of parental support (high, medium and low), significant differences were found in the use of behavioural and cognitively orientated approaches. When perception of parental support was low, swimmers reported using less active and training-orientated mechanisms and a tendency to use strategies such as self-blame and venting of emotion. These findings suggest that the effectiveness and ability of coping strategies to adapt to differing situations may be contingent upon perceptions of perceived support for junior swimmers. This highlights an area for future research.  相似文献