Exercise interventions for older adults: A systematic review of meta-analyses

Background:The evidence concerning which physical exercise characteristics are most effective for older adults is fragmented.We aimed to characterize the extent of this diversity and inconsistency and identify future directions for research by undertaking a systematic review of metaanalyses of exercise interventions in older adults.Methods:We searched the Cochrane Database of Systematic Reviews,PsycInfo,MEDLINE,Embase,CINAHL,AMED,SPORTDiscus,and Web of Science for articles that met the following criteria:(1)meta-analyses that synthesized measures of improvement(e.g.,effect sizes)on any outcome identified in studies of exercise interventions;(2)participants in the studies meta-analyzed were adults aged 65+or had a mean age of 70+;(3)meta-analyses that included studies of any type of exercise,including its duration,frequency,intensity,and mode of delivery;(4)interventions that included multiple components(e.g.,exercise and cognitive stimulation),with effect sizes that were computed separately for the exercise component;and(5)meta-analyses that were published in any year or language.The characteristics of the reviews,of the interventions,and of the parameters improved through exercise were reported through narrative synthesis.Identification of the interventions linked to the largest improvements was carried out by identifying the highest values for improvement recorded across the reviews.The study included 56 meta-analyses that were heterogeneous in relation to population,sample size,settings,outcomes,and intervention characteristics.Results:The largest effect sizes for improvement were found for resistance training,meditative movement interventions,and exercise-based active videogames.Conclusion:The review identified important gaps in research,including a lack of studies investigating the benefits of group interventions,the characteristics of professionals delivering the interventions associated with better outcomes,and the impact of motivational strategies and of significant others(e.g.,carers)on intervention delivery and outcomes.     

From visuo-motor interactions to imitation learning: behavioural and brain imaging studies

We review three areas of research and theory relating to the involvement of motor processing in action observation: behavioural studies on imitation learning, behavioural work on short-term visuomotor interactions, and related neurophysiological and neuroimaging work. A large number of behavioural studies now indicate bi-directional links between perception and action: visual processing can automatically induce related motor processes, and motor actions can direct future visual processing. The related concept of direct matching (Rizzolatti et al., 2001) does not, however, imply that observed actions are transduced into a corresponding motor representation that would guarantee an instant and accurate imitation. Rather, studies on the mirror neuron system indicate that action observation engages the observer's own motor prototype of the observed action. This allows for enhanced action recognition, imitation recognition, and, predominantly in humans, imitation and observational learning. Despite the clear impact of action observation on motor representations, recent neuroimaging work also indicates the overlap of imitation learning with processes of non-imitative skill acquisition.     

The relationship between adopting a synchronous medium and participation in online group work: An explorative study

Achieving student participation it has been argued is one of the most important challenges in distance education. This explorative study examines whether a synchronous communication medium, instant messaging (IM), may enable students to participate more actively in online group work. When comparing two groups that adopted IM with two groups that did not it was found that the adopters had a higher sense of participation and spent more time working with the content and communicating with their peers. Moreover, the social networks of the adopters were slightly denser. Thus, the study indicates that the groups that adopted IM operated with a higher level of participation, although it should be noted that these results are based on a small group of students. All groups used e-mail for group interactions but the adopters also used IM as a complement to e-mail. The paper concludes by calling for more research to test the results of this study in other contexts.     

Teaching responsible citizenship through imaginative narrative mythological structures

This essay investigates the challenge for schools in Romania to educate their students in the civic virtues. Educators have to deal not only with the legacy of Soviet ideologies, but also with the avalanche of messages concerning citizenship that are embedded in the market‐driven media that are increasingly being watched by Romanian students. These media, however, use old archetypical forms concerning narratives and hero characters in order to communicate with their audience. This essay suggests that the school curriculum should also make use of such forms in order to teach students about civic responsibility. These forms use the imagination as a key tool in the transmission of cultural values.     

Teachers and tests: assessing pupils' reading achievement in primary schools

The purpose of the present study was to examine validity aspects of teachers’ judgements of pupils’ reading skills. Data come from Sweden's participation in the Progress in International Reading Literacy Study (PIRLS) 2001, for Grades 3 and 4. For pupils at the same achievement levels, as measured by PIRLS 2001 test, teachers’ judgements of pupils’ achievement levels varied from one teacher to another. Moreover, there were significant differences between teachers’ judgements in Grades 3 and 4. Teachers in Grade 3 who had taught their pupils for almost 3 years showed higher correspondence between their judgements and pupil achievement within classrooms than 4th-grade teachers who, typically, had only taught their pupils for approximately 1 semester at the time of the data collection. The results indicate that teachers’ judgements and tests can be useful within classrooms, but that teachers may need external assessments to calibrate judgements over classrooms.     

The impact of national culture on e‐learning implementation: a comparative study of an Argentinean and a Swedish university

This paper analyses and suggests possible technological innovation strategies in higher educational institutions in Africa. The paper describes management issues in the implementation of eLearning with particular reference to its usage in higher education abroad and in Africa, and also suggests appropriate approaches for technological innovation of higher education in Africa. The major findings of the paper, which are based on three case studies, suggest that eLearning needs to be implemented within a strategically developed framework based on a clear and unified vision and a central educational rationale. The findings further highlight the importance of using a combination of strategies – top–down, bottom–up and inside–out – during the diffusion process to attain coherence, collegiality and ownership. The process of technological transformation is not a smooth translation process but one of dislocations, dilemmas and uncertainties and it is an art to effect change and sustainable technological transformation since people are central to this transformation process.

L'innovation technologique et les stratégies de management pour l'enseignement supérieur en Afrique: L'Harmonisation du réalisme et du l'idéalisme

Cet article analyse et suggére des stratégies d'innovation dans des établissements d'enseignement supérieur en Afrique. Il décrit les problèmes de management qui pose l'introduction du e‐Learning avec une référence particulière pour son usage dans l'enseignement supérieur à l'étranger et en Afrique et suggére les approches appropriées pour l'innovation technologique dans l'enseignement supérieur en Afrique. Les résultats principaux exposés dans cet article qui sont fondés sur trois études de cas suggérent que le e‐Learning doit être introduit dans un cadre stratégique fondé sur une vision clariment unifiée et une rationalisation centrale de l'éducation. De plus ces résultats mettent en évidence l'importance de l'utilisation combinée de plusieurs stratégies : stratégies autant en bas, de bas en haut, d'intérieur et d'extérieur pendant le processus de diffusion afin d'aboutir à la cohérence, la collégialité et la possession. Le processus de transformation technologique n'est pas un processus de translation sans à compris mais un de dislocation, de dilemmes, d'incertitudes et c'est un art de procéder au changement et à une transformation technologique soutenue puisque les hommes sont au c?ur de ce processus de transformation.

Technologische Innovations‐ und Umsetzungsstrategien für höhere Bildung in Afrika: Realität und Idealismus aufeinander abstimmen

Dieser Beitrag analysiert technologische Innovationstrategien und stellt Vorschläge für deren Einführung in höhereren Bildungsinstitutionen in Afrika zur Diskussion. Das Papier beschreibt Managementangelegenheiten bei der Umsetzung von eLearning unter besonderer Berücksichtigung seiner Anwendung in der höheren Bildung im Ausland und in Afrika und schlägt auch entsprechende Ansätze für die technologische Innovation im Bereich der höheren Bildung in Afrika vor. Das wesentliche Ergebmiss dieser Arbeit, die auf drei Fallstudien beruht, ist, dass eLearning innerhalb eines strategisch entwickelten Rahmens, basierend auf einer klaren und einheitlichen Sichtweise und einer zentralen bildungslogischen Grundlage eingeführt werden muß. Die Befunde heben weiter die Wichtigkeit hervor, eine Kombination von Strategien zu verwenden: Top‐Down, Bottom‐Up und Inside‐Out Strategien während des Ausbreitungsprozesses, um Kohärenz, Kollegialität und Eigentumsrechte zu erlangen. Der Prozeß technologischer Transformation ist nicht etwa eine sanfte Überleitung, sondern von Verfremdung, Dilemmata und Unsicherheit begleitet. Es ist eine Kunst, Änderung und nachhaltige technologische Transformation zu bewirken, da ja die Menschen das zentrale Element dieses Transformation-sprozesses sind.     

Seasonal variations in physical fitness among elementary school children

Abstract

There is empirical evidence that children’s physical activity is dependent on climatic conditions. In addition, a correlation between physical activity level and physical fitness has been identified. In this longitudinal study, we investigate whether seasons have an influence on physical fitness. A total of 145 German elementary school children were tested every six months over a two-year period. We used the German Motor Test 6–18 to assess physical fitness. Performance in the 6-min endurance run (P < 0.001), bidirectional jumping (P < 0.001), the standing long jump (P = 0.026), the 20 m sprint (P = 0.006) and the stand-and-reach task (P = 0.017) was significantly better in summer than in winter. There were no differences in the ability to balance backwards (P = 0.120); in the winter, the results for push-ups (P < 0.001) and sit-ups (P < 0.001) were better than those in the summer. We have shown that physical fitness is significantly influenced by the season. Consequently, when children’s fitness tests are used (e.g. as the basis for intervention programs, for classifying health-risk groups or for recognising talent), the season in which testing occurred should be reported and accounted for in future studies.     

Comparisons of the ski turn techniques of experienced and intermediate skiers

We compared selected kinematic variables for four different ski turn techniques performed by five experienced and five intermediate male skiers. The four ski turn techniques were the upstem turn, the downstem turn, the parallel turn and the parallel step turn. Each turn was divided into the initiation phase and the first and second steering phases. Most of the statistically significant differences (P < 0.05) between the two groups were found for the initiation phases of the four turns. Both the hip axis-hand axis angle and the edging angle of the uphill ski were significantly different between the two groups for the upstem turn at the beginning of the initiation phase. For the downstem turn, significant differences between the groups were found at the start of the initiation phase for the hip axis-hand axis angle, the shoulder axis-fall line angle, and the edging angle of the uphill ski. The standard deviation of the distance between the tips of the two skis over the second steering phase also differed significantly between the two groups. For the parallel step turn, significant differences were found at the start of the initiation phase for the edging angle of the downhill ski and the downhill ski to movement direction angle. Significant differences were also found for the edging angle of the downhill ski in the middle of the second steering phase and the shoulder axis to movement direction angle at the end of this phase. For the initiation phase of the parallel turn, significant differences were found for the timing of setting the ski pole, the uphill knee angle at the start of this phase and the range of the knee angle of the uphill leg from the start to the end of this phase. For this turn, significant differences between the two groups were also found for the edging angle of the downhill ski in the middle of the second steering phase and the shoulder axis to movement direction angle at the end of this phase. One of the reasons it was possible to identify a few significant differences only for the turns analysed, was the variability within the intermediate group: for most of the variables analysed, the standard deviation was much higher for the intermediate than for the experienced group.     

Scientific Research Identity Development Need Not Wait Until College: Examining the Motivational Impact of a Pre-college Authentic Research Experience

Research in Science Education - The current study used self-determination theory to examine the efficacy of an established and rigorous STEM enrichment program, the Summer Science Program, in...