排序方式： 共有18条查询结果，搜索用时 15 毫秒
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Wolfgang Seiberl Elisabeth Jensen Josephine Merker Marco Leitel Ansgar Schwirtz 《European Journal of Sport Science》2018,18(8):1100-1109
Force plates represent the “gold standard” in measuring running kinetics to predict performance or to identify the sources of running-related injuries. As these measurements are generally limited to laboratory analyses, wireless high-quality sensors for measuring in the field are needed. This work analysed the accuracy and precision of a new wireless insole forcesensor for quantifying running-related kinetic parameters. Vertical ground reaction force (GRF) was simultaneously measured with pit-mounted force plates (1?kHz) and loadsol® sensors (100?Hz) under unshod forefoot and rearfoot running-step conditions. GRF data collections were repeated four times, each separated by 30 min treadmill running, to test influence of extended use. A repeated-measures ANOVA was used to identify differences between measurement devices. Additionally, mean bias and Bland–Altman limits of agreement (LoA) were calculated. We found a significant difference (p?® devices for these parameters. For these same parameters, the LoA analysis showed that 95% of all measurement differences between insole and force plate measurements were less than 12%, demonstrating high precision of the sensors. However, highly dynamic behaviour of GRF, such as force rate, is not yet sufficiently resolved by the insole devices, which is likely explained by the low sampling rate. 相似文献
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Ansgar Molzberger 《国际体育史杂志》2014,31(12):1478-1488
The German re-entry into the Olympic Movement after the Second World War took place at the 1952 Olympic Winter Games in Oslo – the capital of a country which had been occupied by Nazi Germany from 1940 to 1945. The wounds of war had by no means healed in Norway at the time of the Oslo event; thus, the 1952 Olympic Games became once more a political issue. In fact, prior to the event, the question of German participation had given rise to numerous discussions between Norway, the Federal Republic of Germany and the IOC. Therefore, the West German ‘Return to Olympia’ was a process which took two years and required patience and diplomatic tact. The objective of this article is to trace this process both from the Norwegian and German perspectives since the research results on the subject available to date emphasised either a Norwegian or a German perspective. This approach also seems interesting against the historical background of the onset of the Cold War. 相似文献
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Ansgar Allen 《British Journal of Sociology of Education》2012,33(5):641-659
This paper argues that, despite the obvious and important differences between high-stakes and low-stakes assessment, there remain important points in common. These manifest themselves at a sociological level, where each tradition of assessment shares a similar disposition towards power. It is argued that both high-stakes and low-stakes assessment, as they are practised in England today, act together in support of a wider regime of power. This regime relies upon the construction of specialised subjectivities, defined by a myopic and self-perpetuating concern with individual progression. 相似文献
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Education systems increasingly emphasize the importance of scientific reasoning skills such as generating hypotheses and evaluating evidence. Despite this importance, we do not know which tests of scientific reasoning exist, which skills they emphasize, how they conceptualize scientific reasoning, and how well they are evaluated. Therefore, this article reviews 38 scientific reasoning tests. They used to primarily consist of multiple-choice questions, but since then have become more diverse, even including tests that automatically analyse virtual experiments. Furthermore, this review revealed that the tests focus on the skills of generating hypotheses, generating evidence, evaluating evidence, and drawing conclusions. Additionally, conceptualizations of scientific reasoning have moved towards a domain-specific set of different but coordinated skills over the years. Finally, concluding from gaps in test evaluation, a future focus should be on testing theoretical assumptions, comparing different scientific reasoning tests, and how relevant test results are in predicting criterion variables like academic performance. 相似文献
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Arne Güllich Peter Kovar Sebastian Zart Ansgar Reimann 《Journal of sports sciences》2017,35(3):207-215
This study examined contributions of different types of sport activities to the development of elite youth soccer performance. Match-play performance of 44 German male players was assessed by expert coaches twice, 24 months apart (age 11.1–13.1 years), based on videotaped 5v5 matches. Player pairs were matched by identical age and initial performance at t1. Each player was assigned to a group of either “Strong” or “Weak Responders” based on a higher or lower subsequent performance improvement at t2 within each pair (mean Δperformance 29% vs. 7%). A questionnaire recorded current and earlier amounts of organised practice/training and non-organised sporting play, in soccer and other sports, respectively. Group comparison revealed that “Strong Responders” accumulated more non-organised soccer play and organised practice/training in other sports, but not more organised soccer practice/training. Subsequent multivariate analyses (multiple linear regression analyses (MLR)) highlighted that higher resultant match-play performance at t2 was accounted for R2adj = 0.65 by performance at t1, together with more non-organised soccer play and organised engagement in other sports, respectively, and greater current, but less earlier volume of organised soccer. The findings suggest that variable early sporting experience facilitates subsequent soccer performance development in German elite youth footballers. 相似文献
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Fehrenbach E Niess AM Passek F Sorichter S Schwirtz A Berg A Dickhuth HH Northoff H 《Journal of sports sciences》2003,21(5):383-389
Haem-oxygenase-1 (HO-1) is an antioxidant stress protein that is mainly induced by reactive oxygen species, inflammatory cytokines and hyperthermia. We assessed the influence of different types of exercise on HO-1 expression in leukocytes of the peripheral blood in three groups of male participants: a short exhaustive run above the lactate steady state (n = 15), eccentric exercise (n = 12) and an intensive endurance run (half-marathon, n = 12). Blood samples were taken at rest and up to 24 h after exercise. Blood lactate concentration after exercise was 9.0 +/- 2.1, 3.8 +/- 1.6 and 5.1 +/- 2.2 mmol x l(-1) (mean +/- s) for the exhaustive run, eccentric exercise and half-marathon groups, respectively (P < 0.05). Creatine kinase concentration was highest 24 h after exercise: 133 +/- 91, 231 +/- 139 and 289 +/- 221 U x l(-1) for the exhaustive run, eccentric exercise and half-marathon groups, respectively (P < 0.05). The maximal increase in leukocyte counts after exercise was 11.5 +/- 19.2, 6.2 +/- 1.4 and 14.7 +/- 2.1 x 10(9) x l(-1). There was no change in HO-1 as a result of the short exhaustive run or the eccentric exercise, whereas the half-marathon had a significant stimulatory effect on HO-1-expression in lymphocytes, monocytes and granulocytes (P < 0.001) using flow cytometry analyses. In conclusion, eccentric exercise alone or short-term heavy exercise are not sufficient to stimulate the antioxidative stress protein HO-1 in peripheral leukocytes 相似文献
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Carmen Zahn Norbert Schaeffeler Katrin Elisabeth Giel Daniel Wessel Ansgar Thiel Stephan Zipfel Friedrich W. Hesse 《Education and Information Technologies》2014,19(3):603-621
Mobile phones and advanced web-based video tools have pushed forward new paradigms for using video in education: Today, students can readily create and broadcast their own digital videos for others and create entirely new patterns of video-based information structures for modern online-communities and multimedia environments. This paradigm shift in video usage can be used for advanced learning about complex topics in higher education, for example, learning about socio-scientific or medical topics. Yet–technology aside–applicable educational concepts using collaborative video creation as a method need to be developed. In the present study, we investigate a specific concept designed to fight obesity stigmatization by developing knowledge using a learning-through-design-approach. We expected that creating videos can actually contribute to a deeper understanding of obesity and to a reduction in stigmatizing attitudes–when compared to a control condition. Dependent measures were based on the students’ video products, obesity-related knowledge and attitudes. The course group assessed their own knowledge on causes of obesity and stigmatization because of obesity higher in the post-test than a control group who read a newspaper article on the topic. A corresponding significant reduction in stigmatizing attitudes was found. In sum, results indicate significant differences between students who produced YouTube videos and a control group of students. The results are interpreted as a confirmation of our initial assumptions and evidence indicating that the program is successfully applicable in higher education. 相似文献
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Injury in competitive sport is widely seen as a topic within the medical and psychological domain. This article gives an overview of sociological research on dealing with injury in competitive sport. Besides findings of a culture of risk, medical treatment practices and the governance of medical support systems, there are still many unanswered questions to which the sociology of sport could make a relevant contribution. Perspectives for future studies correspond with the social dynamics of injury, the structural role constraints in a medical treatment or rehabilitation context, and the governance of complex social networks for injury prevention, treatment and rehabilitation processes. 相似文献