Optimising technical skills and physical loading in small-sided basketball games     

Markus J. Klusemann  David B. Pyne  Carl Foster  Eric J. Drinkwater 《Journal of sports sciences》2013,31(14):1463-1471

Abstract

Differences in physiological, physical, and technical demands of small-sided basketball games related to the number of players, court size, and work-to-rest ratios are not well characterised. A controlled trial was conducted to compare the influence of number of players (2v2/4v4), court size (half/full court) and work-to-rest ratios (4x2.5 min/2x5 min) on the demands of small-sided games. Sixteen elite male and female junior players (aged 15–19 years) completed eight variations of a small-sided game in randomised order over a six-week period. Heart rate responses and rating of perceived exertion (RPE) were measured to assess the physiological load. Movement patterns and technical elements were assessed by video analysis. There were ～60% more technical elements in 2v2 and ～20% more in half court games. Heart rate (86 ± 4% & 83 ± 5% of maximum; mean ± SD) and RPE (8 ± 2 & 6 ± 2; scale 1–10) were moderately higher in 2v2 than 4v4 small-sided games, respectively. The 2v2 format elicited substantially more sprints (36 ±12%; mean ±90% confidence limits) and high intensity shuffling (75 ±17%) than 4v4. Full court games required substantially more jogging (9 ±6%) compared to half court games. Fewer players in small-sided basketball games substantially increases the technical, physiological and physical demands.  相似文献   

Parallel assessment of nutrition and activity in athletes: Validation against doubly labelled water, 24-h urea excretion,and indirect calorimetry     

Karsten Koehler  Hans Braun  Markus De Marées  Gerhard Fusch  Christoph Fusch  Joachim Mester 《Journal of sports sciences》2013,31(13):1435-1449

Abstract

The assessment of nutrition and activity in athletes requires accurate and precise methods. The aim of this study was to validate a protocol for parallel assessment of diet and exercise against doubly labelled water, 24-h urea excretion, and respiratory gas exchange. The participants were 14 male triathletes under normal training conditions. Energy intake and doubly labelled water were weakly associated with each other (r = 0.69, standard error of estimate [SEE] = 304 kcal · day^?1). Protein intake was strongly correlated with 24-h urea (r = 0.89) but showed considerable individual variation (SEE = 0.34 g · kg^?1 · day^?1). Total energy expenditure based on recorded activities was highly correlated with doubly labelled water (r = 0.95, SEE = 195 kcal · day^?1) but was proportionally biased. During running and cycling, estimated exercise energy expenditure was highly correlated with gas exchange (running: r = 0.89, SEE = 1.6 kcal · min^?1; cycling: r = 0.95, SEE = 1.4 kcal · min^?1). High exercise energy expenditure was slightly underestimated during running. For nutrition data, variations appear too large for precise measurements in individual athletes, which is a common problem of dietary assessment methods. Despite the high correlations of total energy expenditure and exercise energy expenditure with reference methods, a correction for systematic errors is necessary for the valid estimation of energetic requirements in individual athletes.  相似文献   

Tocqueville in Cyberspace: Using the Internet for Citizen Associations     

Hans K. Klein 《The Information Society》2013,29(4):213-220

Political theorists like Alexis de Tocqueville have long recognized the importance of citizen associations for the practice of democracy. Through participation in associations, citizens both receive an education in public affairs and create centers of political power independent of the state. Essential to participation in an association is participation in a forum, a communication space that allows for many-to-many communication in which citizens can "treat of public affairs in public" (Tocqueville, 1945, p. 109). Participation in forums suffers from numerous barriers, however, such as the need to meet in one common place, the need to meet at one common time, and the potentially high costs of participation. Online forums on the Internet avoid many of these barriers, and thus they hold the promise of facilitating the formation and operation of citizen associations. This was confirmed in 1995 by the experiences of a Boston-based citizen association, the Telecommunication Policy Roundtable-Northeast (TPR-NE). TPR-NE's uses of the Internet suggest that online forums may allow associations to be more responsive, more robust, and able to unite more members.  相似文献   

Data Mining in Elite Sports: A Review and a Framework     

Bahadorreza Ofoghi  John Zeleznikow  Clare MacMahon  Markus Raab 《Measurement in physical education and exercise science》2013,17(3):171-186

Sophisticated data analytical methods such as data mining, where the focus is upon exploration and developing new insights, are becoming increasingly useful tools in analysing elite sports performance data and supporting decision making that is crucial to gaining success. In this article, we investigate the different data mining demands of elite sports with respect to a number of features that describe sport competitions. The aim is to more structurally connect the sports and data mining domains through: (a) describing a framework for categorizing elite sports, and (b) understanding the analytical demands of different performance analysis problems. Therefore, we review different aspects such as sport categories and performance analysis requirements that influence each stage in sports data mining. We also present a model bringing together performance analysis requirements, data mining methods, data mining techniques, and technique characteristics. This will assist both data scientists and sport professionals to more effectively collaborate and contribute to success in elite sport events.  相似文献   

Performance improvement competencies for instructional technologists     

James D. Klein  Eric J. Fox 《TechTrends》2004,48(2):22-25

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Portale Hypertension     

Bernhard Angermayr  Markus Peck-Radosavljevic 《Wiener klinische Wochenschrift Education》2008,3(2):107-118

Ohne Zusammenfassung  相似文献   

A meta‐analysis of school‐wide positive behavior support: An exploratory study using single‐case synthesis     

Benjamin G. Solomon  Suzanne A. Klein  John M. Hintze  James M. Cressey  Sarah L. Peller 《Psychology in the schools》2012,49(2):105-121

Positive Behavior Support (PBS) for behavioral problems was included in the 1997 Individuals With Disabilities Education Act reauthorization, reflecting the increased implementation and strengthening empirical evidence for PBS in schools. Whereas PBS can be used reactively, its flexibility has led to a popular comprehensive school‐wide model used for prevention. School‐Wide Positive Behavioral Support (SWPBS) has been used across a variety of school environments and various demographics and has been evaluated using a variety of different outcome measures. The authors conducted a meta‐analysis of SWPBS research spanning 16 years and 20 articles. Specifically, single‐case studies were evaluated using a regression‐based procedure. Results show promising early trends in the data across dependent variables with a need for further research in specific areas. © 2011 Wiley Periodicals, Inc.  相似文献   

Exploring Innovative Entrepreneurship and Its Ties to Higher Educational Experiences     

Matthew J. Mayhew  Jeffrey S. Simonoff  William J. Baumol  Batia M. Wiesenfeld  Michael W. Klein 《Research in higher education》2012,53(8):831-859

The purpose of this paper was to explore innovative entrepreneurship and to gain insight into the educational practices and experiences that increase the likelihood that a student would graduate with innovative entrepreneurial intentions. To this end, we administered a battery of assessments to 3,700 undergraduate seniors who matriculated in the spring of 2007; these students attended one of five institutions participating in this study. Results showed that, after controlling for a host of personality, demographic, educational, and political covariates, taking an entrepreneurial course and the assessments faculty use as pedagogical strategies for teaching course content were significantly related to innovation intentions. Implications for higher education stakeholders are discussed.  相似文献   

Using automatic item generation to meet the increasing item demands of high-stakes educational and occupational assessment     

Martin E. Arendasy  Markus Sommer 《Learning and individual differences》2012,22(1):112-117

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Associations Between Teacher-Rated Versus Self-Rated Student Temperament and School Achievement     

Sari Mullola  Mirka Hintsanen  Markus Jokela  Jari Lipsanen  Saija Alatupa  Niklas Ravaja 《Scandinavian Journal of Educational Research》2014,58(2):147-172

This study examined whether teacher-rated versus self-rated student temperaments are different in relation to the school grades in Maths and Mother language (ML) instruction in a nationally representative sample of Finnish Secondary School students (n?=?1,063, mean age 15.1 years). The results indicated that teacher-rated temperament was more strongly associated with students' Maths and ML grades than self-rated temperament. All the teacher-rated temperament traits were associated with school grades, accounting for 38% and 45% of the variance in Maths and ML, respectively. Of the self-rated temperaments, high task orientation and its components, high persistence and low distractibility, were associated with better school grades both in Maths and ML. Low reactivity and low negative emotionality were associated only with better ML grades, whereas high inhibition was associated only with better Maths grades. A temperament-conscious education needs to be taken into account in future teacher training.  相似文献