How does the modern football goalkeeper train? – An exploration of expert goalkeeper coaches’ skill training approaches     

Fabian W. Otte  Sarah-Kate Millar  Stefanie Klatt 《Journal of sports sciences》2020,38(11-12):1465-1473

ABSTRACT

The football goalkeeper position arguably represents a unique role within the team sport. Despite its highly complex skill demands, research on football goalkeeping has only sporadically examined the position within isolated and limited parameters. In particular, there is limited literature on “modern” skill acquisition training methods and approaches within the field of goalkeeper training. In a cross-cultural study with fifteen expert goalkeeper coaches, researchers here examined the overarching research question of “how does the modern football goalkeeper train?”. Semi-structured interviews explored expert coaches’ views on critical skills for performance in goalkeeping and the training approaches used to develop these critical skills. Results indicate that four skill sets are considered essential by goalkeeper coaches, these are: decision-making skills, athleticism, mentality, and technical skills. In terms of developing these skills in goalkeeper-specific training, the majority of expert coaches apply a similar microstructure to training sessions. This structure involves a steady progression from simple to complex training tasks, where for large parts, isolated technical training appears to be prioritised over a holistic training approach that integrates technical skills and perceptual-cognitive components (e.g., decision making). Scientific and practical recommendations for researchers and practitioners in the field of football goalkeeper coaching are provided.  相似文献   

Callan and Dewey's Conception of Education as Growth     

Fabian S. Essiet 《Educational theory》1985,35(2):195-197

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From the Editor     

Lisa Romero 《Behavioral & Social Sciences Librarian》2017,36(2)

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Internal,External, and Government Political Efficacy: Effects on News Use,Discussion, and Political Participation     

Homero Gil de Zúñiga  Trevor Diehl  Alberto Ardévol-Abreu 《广播与电子媒介杂志》2017,61(3):574-596

News use and political discussion are often studied as important factors in understanding the effects of political efficacy on participation. However, measurements of external efficacy often blur distinctions between personal ability and government responsiveness. This study establishes a measure for perceptions of competence in the institutions of democratic government—government efficacy (GE). Drawing on panel survey data from the United States, confirmatory factor analysis introduces GE as a unique construct. Political efficacy dimensions are tested for their impact on news consumption, discussion, and political participation. Results add to the extant literature revolving the role of political efficacy on news use, discussion, and participation.  相似文献   

Bookbinding Information on the Web: Breaking the Circle,from Pixels to Linked Open Data     

Alberto Campagnolo 《International Information and Library Review》2017,49(1):37-50

The “Digital Heritage: Spotlight on Europe” column examines technological advances internal and external to cultural institutions. The digital shift changed radically how cultural heritage is made, disseminated, distributed, accessed, consumed, and monetized. One of the most important revolutions is that the user's role changed dramatically, shifting from passive observers to active participants and content producers with many new and exciting opportunities for engagement, creative use, and access. The strength of the column is its broad, international focus, and contributors are encouraged to explore issues and recent advances in digital heritage theories, methodologies, standards relevant to the European region, as well as the larger, global audience. Interested authors are invited to submit proposals and articles to the column editor at annamaria.tammaro@unipr.it. Please include “ILLR submission” in the subject line of the e-mail.  相似文献   

Analysis of the predictive qualities of betting odds and FIFA World Ranking: evidence from the 2006, 2010 and 2014 Football World Cups     

Fabian Wunderlich  Daniel Memmert 《Journal of sports sciences》2016,34(24):2176-2184

ABSTRACT

The present study aims to investigate the ability of a new framework enabling to derive more detailed model-based predictions from ranking systems. These were compared to predictions from the bet market including data from the World Cups 2006, 2010, and 2014. The results revealed that the FIFA World Ranking has essentially improved its predictive qualities compared to the bet market since the mode of calculation was changed in 2006. While both predictors were useful to obtain accurate predictions in general, the world ranking was able to outperform the bet market significantly for the World Cup 2014 and when the data from the World Cups 2010 and 2014 were pooled. Our new framework can be extended in future research to more detailed prediction tasks (i.e., predicting the final scores of a match or the tournament progress of a team).  相似文献   

Loneliness and physical activity: A systematic review     

Fabian Pels  Jens Kleinert 《International review of sport and exercise psychology》2016,9(1):231-260

This article aims to provide an overview of the current state of research on the relationship between loneliness and physical activity (PA). A systematic literature search was conducted to identify all empirical studies assessing this relationship. A total of 37 studies stemming from 36 publications met the inclusion criteria. Study analyses comprised an individual consideration of each study and a systematic summarization of the studies. The majority of eligible studies focused on adolescent or elderly populations. Direct negative associations between PA and loneliness were found in half of the 24 cross-sectional studies. Of the seven identified longitudinal studies, one found a direct negative influence of PA on loneliness. Four longitudinal studies found evidence for a reverse influence, namely of loneliness on PA. Five intervention studies found PA to reduce loneliness. Two of the cross-sectional studies and one of the intervention studies found social support and social competence to moderate or to mediate the relationship between PA and loneliness. The findings indicate that PA can contribute to a decrease in loneliness. However, studies also indicate that any beneficial effect is dependent upon the quality of relationships present during physical activity. Additionally, loneliness itself might reduce the probability of being physically active.  相似文献   

Accuracy of elevation recording using sport watches while walking and running on hilly and flat terrain     

Rahel Ammann  Wolfgang Taube  Fabian Kummer  Thomas Wyss 《Sports Engineering》2016,19(4):283-287

Elevation gain (EG) is a significant contributor to the total workload in many endurance sports. Hence, the aim of this study was to evaluate the accuracy of elevation recording as assessed by popular sport watches. Eighteen participants walked and ran at different speeds in various weather conditions in two terrain types: on a hilly 2490 m course with a total EG of 90 m and on a flat 1200 m outdoor track with 0 m EG. In total, 180 recordings from each sport watch were analyzed and compared according to two processing types: filtered and unfiltered EG data. Compared to the reference values, regarding default settings, on hilly terrain, EG was underestimated by ?3.3 to ?9.8 %, and on flat terrain, EG was overestimated by 0.0–4.8 m per 1200 m. These errors could be reduced to ?3.3 to +0.4 %, when filtering conditions were adjusted according to the terrain. Gait speed (ranging from 1.47 to 4.89 m s^?1) or fluctuations in weather conditions between- or within-trials did not influence EG accuracy. A straightforward comparison between manufacturers is hampered as the filter conditions set by default differ. In conclusion, all devices measure EG adequately; however, the displayed default feedback on EG data is not always the most accurate measurement. Consequently, accuracy in elevation recordings could be increased if users appropriately post-process EG data.  相似文献   

Recumbent vs. upright bicycles: 3D trajectory of body centre of mass,limb mechanical work,and operative range of propulsive muscles     

Riccardo Telli  Gaspare Pavei  Alberto Enrico Minetti 《Journal of sports sciences》2017,35(5):491-499

Recumbent bicycles (RB) are high performance, human-powered vehicles. In comparison to normal/upright bicycles (NB) the RB may allow individuals to reach higher speeds due to aerodynamic advantages. The purpose of this investigation was to compare the non-aerodynamic factors that may potentially influence the performance of the two bicycles. 3D body centre of mass (BCoM) trajectory, its symmetries, and the components of the total mechanical work necessary to sustain cycling were assessed through 3D kinematics and computer simulations. Data collected at 50, 70, 90 110 rpm during stationary cycling were used to drive musculoskeletal modelling simulation and estimate muscle-tendon length. Results demonstrated that BCoM trajectory, confined in a 15-mm side cube, changed its orientation, maintaining a similar pattern across all cadences in both bicycles. RB displayed a reduced additional mechanical external power (16.1 ± 9.7 W on RB vs. 20.3 ± 8.8 W on NB), a greater symmetry on the progression axis, and no differences in the internal mechanical power compared to NB. Simulated muscle activity revealed small significant differences for only selected muscles. On the RB, quadriceps and gluteus demonstrated greater shortening, while biceps femoris, iliacus, and psoas exhibited greater stretch; however, aerodynamics still remains the principal benefit.  相似文献   

Opening the Regulatory Black Box of Clinical Cancer Research: Transnational Expertise Networks and “Disruptive” Technologies     

Alberto Cambrosio  Pascale Bourret  Peter Keating  Nicole Nelson 《Minerva》2017,55(2):161-185

Building on previous work on “regulatory objectivity,” the paper examines recent translational research and cancer genomics to explore the bundle of scientific and regulatory activities that generate and manage the platforms at the core of clinical trials, the “gold standard” of clinical research and evidence-based medicine. In particular, the paper explores the activities of a chain of mediators within a seamless regulatory web characterized by the interaction of endogenous and hybrid regulatory activities that are neither hierarchical nor linear. We contend that a full understanding of the dynamics of regulation in the biomedical domain ought to consider this chain of mediations; that their analysis necessitates understanding the content of the practices they regulate; and that in addition to examining the interactions between different regulatory modalities, we need to pay attention to their development insofar as regulation, far from being mere routine, leads to the emergence of novelty by coproducing the entities it regulates. These activities include not only setting out the conditions that must be respected in order to produce reliable test results, but also the conditions that define the relations (within a clinical context) between the different components of diagnosis as well as the consequences of such relations on clinical judgment. This is why we cannot treat organizational practices as distinct from the content of bio-clinical activities.  相似文献