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21.
The aim of this study was to determine the influence of type of warm-up on metabolism and performance during high-intensity exercise. Eight males performed 30 s of intense exercise at 120% of their maximal power output followed, 1 min later, by a performance cycle to exhaustion, again at 120% of maximal power output. Exercise was preceded by active, passive or no warm-up (control). Muscle temperature, immediately before exercise, was significantly elevated after active and passive warm-ups compared to the control condition (36.9 +/- 0.18 degrees C, 36.8 +/- 0.18 degrees C and 33.6 +/- 0.25 degrees C respectively; mean +/- sx) (P< 0.05). Total oxygen consumption during the 30 s exercise bout was significantly greater in the active and passive warm-up trials than in the control trial (1017 +/- 22, 943 +/- 53 and 838 +/- 45 ml O2 respectively). Active warm-up resulted in a blunted blood lactate response during high-intensity exercise compared to the passive and control trials (change = 5.53 +/- 0.52, 8.09 +/- 0.57 and 7.90 +/- 0.38 mmol x l(-1) respectively) (P < 0.05). There was no difference in exercise time to exhaustion between the active, passive and control trials (43.9 +/- 4.1, 48.3 +/- 2.7 and 46.9 +/- 6.2 s respectively) (P= 0.69). These results indicate that, although the mechanism by which muscle temperature is elevated influences certain metabolic responses during subsequent high-intensity exercise, cycling performance is not significantly affected. 相似文献
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This article estimates the effects of school expenditure on school performance at Key Stage 4 in England, over the period 2003–07 during which real per pupil expenditure increased rapidly. It adds to previous investigations by using dynamic panel analysis to: exploit time series data on individual schools that only recently has become available; adjust for the potential endogeneity not only of expenditure but also of other determinants of performance; and differentiate the short‐run and the (higher) long‐run attainment effects of spending changes. Consistent with other recent work, the article reports a generally significant but small effect of expenditure on school performance, but it also finds that the effect varies between specialist and non‐specialist schools, with the effect on the latter being larger. Further, the article identifies significant dynamics in the school improvement process, quantifies the long‐run effect of expenditure changes, suggests that spending effects increase with socio‐economic disadvantage, and quantifies absence effects. 相似文献
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Tertiary Education and Management - Gray, C., Swain, J., and Rodway-Dyer, S. (2014). Student voice and engagement: connecting through partnership. Tertiary Education and Management, 20(1), pp.... 相似文献
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Harry Gray 《School Leadership & Management》2013,33(2):157-161
Vice-principals’ role and their relationship with principals are of paramount importance in shaping the effectiveness of school management, particularly after the implementation of school-based management (SBM) worldwide. This paper reports primarily on prior studies on the vice-principalship and suggests a framework to help explain the different working relationships between principals and vice-principals. The framework is a matrix based on three dimensions, namely status, roles and management tasks. The framework was then examined through an illustrative case study. What emerged was that the framework provides a powerful means to explain the different combinations of relationship between principals and vice-principals. 相似文献
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In this study, criminal justice classes were team taught by six pairs of one faculty member and one student teacher. The professor-student teaching teams met together before class to plan and after class to problem solve. The student teachers were charged with helping the professors introduce active learning exercises into their classes. This article reports on survey data from these professors, student teachers and the students they taught, including their views on both the benefits and problems. The article shows professors how to team teach with a student and helps professors who want to try the approach to anticipate and minimize the problems while capitalizing on the benefits. 相似文献
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Lauren Grasmick Timothy Gray Davies 《Community College Journal of Research & Practice》2013,37(2):67-80
This grounded theory study addressed the issue of how community college presidents foster active, broad-based participation in campus decision-making processes. This study was based on in-depth interviews with nationally recognized community college presidents selected on the basis of their work in implementing participative governance within their respective institutions. The findings of this study are presented according to the emergence of four axial categories, and a core category is described and explained. Participative leadership is highly interactive and dynamic. Perhaps most importantly, participative leadership is a developmental process for building environments for broad participation. The core category, Visioning Participative Environments, reveals the centrality of the visioning process throughout each sequence of the participative leadership process. This model identifies and explains key participative leadership practices that flow from the theoretical cornerstones. 相似文献