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Riccardo Di Giminiani Jozsef Tihanyi Sandor Safar Renato Scrimaglio 《Journal of sports sciences》2013,31(2):169-177
Abstract The aim of this study was to assess the effects of 8 weeks of whole-body vibrations on explosive and reactive leg strength. Thirty-three physically active students took part in the study and were randomly assigned to an individualized-vibration group, a fixed-vibration group or a control group. The frequency of vibration was set to 30 Hz for the fixed-vibration group, whereas the frequency for the individualized-vibration group was determined by monitoring the participants' EMGrms activity. The participants in the two vibration groups were exposed three times a week for 8 weeks to a series of 10 × 1-min whole-body vibrations with a 1-min pause between series of vibrations and a 4-min pause after the first five series of vibrations. Jump height in the squat jump increased significantly in all three groups (by 11% for the individualized-vibration group, p = 0.001; by 3% for the fixed-vibration group, p = 0.011; and by 2% for the control group, p = 0.006), but countermovement jump height was not affected. In continuous rebound jumps by the individualized-vibration group, jumping height increased by 22% (p = 0.006) and power increased by 18% (p = 0.002). The results of this study suggest that the use of an individualized vibration frequency produces a greater response from the neuromuscular system and is more beneficial than vibrations at a fixed pre-selected frequency. 相似文献
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Krisztina Tihanyi 《International Journal of Inclusive Education》2013,17(2):177-197
The year 2004 marked the 50th anniversary of the landmark Brown vs. Board of Education case that put an official end to segregated schooling in the USA. Desegregation has received little attention as of late, yet a number of scholars argue that the work of desegregation is far from being complete in the USA. The aim of this paper is to refocus attention on desegregation through a detailed comparison with a more recent case: the racial integration of schools in post‐Apartheid South Africa. While South Africa is not held up as the perfect example of integration, it illuminates concepts and ideas that may explain shortcomings of the US process and present new alternatives to revitalize the process. Likewise, it is hoped that the historical example of the USA is instructive to those involved in the integration effort in South Africa. 相似文献
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Hungary is a country in transition that has no real tradition of peer helping. A qualitative study was carried out involving
13 peer helpers of two kinds (a) age-based peers, and (b) way-of-life-based peers (fellow helpers). The motivations for and
the processes of becoming a peer helper were analyzed. Results showed the largest difference being that the motivation for
becoming an aged-based peer helper tended to involve aspirations for a professional helping career, whereas way-of-life-based
peer helpers typically involved recovery narratives. The experiences suggest that a helping system involving civil society
(peers) might develop from a state-controlled help system.
相似文献
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