Over the last few decades the power struggle between nations to win medals in major international competitions has intensified. This has led to national sports organisations and governments throughout the world spending increasing sums of money on elite sport. Several nations have indeed shown that accelerated funding in elite sport can lead to an increase of medals won at the Olympics. Nevertheless, in spite of increasing competition and the homogenisation of elite sports systems, the optimum strategy for delivering international success is still unclear. There is no model for comparing, and increasing, the efficiency and effectiveness of elite sport investments and management systems. This makes it difficult for sports managers and policy makers to prioritise and to make the right choices in elite sports policy. This book presents an international comparison of elite sport policies in six nations (Belgium, Canada, Italy, the Netherlands, Norway and United Kingdom). Over 1,400 athletes, coaches and performance directors in these nations have provided information on the climate to perform at the highest level of elite sport in their country. Over a hundred criteria are evaluated and compared using a scoring system in nine sport policy areas. This book is aimed at sports professionals, academics and politicians seeking a better understanding of the factors that lead to international sporting success and seeking insights in future sport policy developments.
In sports, inertial measurement units are often used to measure the orientation of human body segments. A Madgwick (MW) filter can be used to obtain accurate inertial measurement unit (IMU) orientation estimates. This filter combines two different orientation estimates by applying a correction of the (1) gyroscope-based estimate in the direction of the (2) earth frame-based estimate. However, in sports situations that are characterized by relatively large linear accelerations and/or close magnetic sources, such as wheelchair sports, obtaining accurate IMU orientation estimates is challenging. In these situations, applying the MW filter in the regular way, i.e., with the same magnitude of correction at all time frames, may lead to estimation errors. Therefore, in this study, the MW filter was extended with machine learning to distinguish instances in which a small correction magnitude is beneficial from instances in which a large correction magnitude is beneficial, to eventually arrive at accurate body segment orientations in IMU-challenging sports situations. A machine learning algorithm was trained to make this distinction based on raw IMU data. Experiments on wheelchair sports were performed to assess the validity of the extended MW filter, and to compare the extended MW filter with the original MW filter based on comparisons with a motion capture-based reference system. Results indicate that the extended MW filter performs better than the original MW filter in assessing instantaneous trunk inclination (7.6 vs. 11.7◦ root-mean-squared error, RMSE), especially during the dynamic, IMU-challenging situations with moving athlete and wheelchair. Improvements of up to 45% RMSE were obtained for the extended MW filter compared with the original MW filter. To conclude, the machine learning-based extended MW filter has an acceptable accuracy and performs better than the original MW filter for the assessment of body segment orientation in IMU-challenging sports situations.
For twenty years, typical outdoor lifestyle sports like rafting, snowboarding and rock climbing, which used to be exclusively practised in natural environments, are being offered in controlled artificial settings. This process can be described as 'the indoorisation of outdoor sports'. With this development, questions of authenticity arise. Are these new, commercial forms still authentic lifestyle sports? And can we consider the participants in these indoorised lifestyle sports as authentic? There has been a discussion about authenticity in lifestyle sports since its worldwide popularisation and it is worth to reconsider this discussion against the background of new, commercial versions of lifestyle sports. Therefore, in this paper a qualitative analysis is offered about the consumption of a constructed authenticity in a cultural context increasingly characterized by artificialization.
