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941.
In this study, we examined the consequences of a global alteration in running technique on running kinematics and running economy in triathletes. Sixteen sub-elite triathletes were pre and post tested for running economy and running kinematics at 215 and 250 m.min-1. The members of the treatment group (n=8) were exposed to 12 weeks of instruction in the "pose method" of running, while the members of the control group (n=8) maintained their usual running technique. After the treatment period, the experimental group demonstrated a significant decrease in mean stride length (from 137.25+/-7.63 cm to 129.19+/-7.43 cm; P<0.05), a post-treatment difference in vertical oscillation compared with the control group (6.92+/-1.00 vs. 8.44+/-1.00 cm; P<0.05) and a mean increase in submaximal absolute oxygen cost (from 3.28+/-0.36 l.min-1 to 3.53+/-0.43 l.min-1; P<0.01). The control group exhibited no significant changes in either running kinematics or oxygen cost. The global change in running mechanics associated with 12 weeks of instruction in the pose method resulted in a decrease in stride length, a reduced vertical oscillation in comparison with the control group and a decrease of running economy in triathletes. 相似文献
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George Villanueva Carmen Gonzalez Minhee Son Evelyn Moreno Wenlin Liu Sandra Ball-Rokeach 《Journal of Applied Communication Research》2017,45(5):474-494
The need to better engage low-income communities affected by revitalization of the built environment has been well documented in urban planning. Guided by communication infrastructure theory (CIT), this study presents a research project that made concerted efforts at engaging neighborhoods of Northeast Los Angeles that are experiencing rapid gentrification. The project was a partnership with a multi-sector collaborative working on the revitalization of the L.A. River and its surrounding communities. This paper specifically demonstrates how CIT's social ecological orientation was applied to seek input on L.A. River and community revitalization from storytelling networks made up of residents, small businesses, and local media. We also examine the impact of this engaged research on the organizational partners of the collaborative, and their views on community engagement in revitalization. Lastly, we discuss how the lessons learned broadly speak to future opportunities and challenges that aim for communicative planning approaches to urban revitalization. 相似文献
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The study examines changes in the productivity of U.S. colleges and universities in the provision of instruction from 1967–68 to 1976–77. Combining our data with that from June O'Neill's earlier study of the 1929–30 to 1966–67 period it is possible to observe productivity trends over a period of nearly fifty years. Our figures show declining output per unit of input from the late sixties to the late seventies, and we attribute the decline to an inability to adjust rapidly to changes in demand, the momemtum of the 1960s expansion programs, and a dramatic decline in external funding of research. 相似文献
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This is the concluding part of a three-part series on Planning, Program, Budgeting Systems (PPBS) in higher education planning and management. After the experiences of the University of California with PPBS, which we reviewed in Part II, and the subsequent lack of success of PPBS in non-defense applications, we believe a more carefully focused policy analysis approach to be more fruitful. In this paper we describe the nature, foci, and analytical base for policy analysis and present a case study of policy analysis applied to the decision of year-round operations for the University of California. Finally, we give some concluding comments and observations.Parts I and II have previously appeared in Higher Education (1972), vol. 1, nos. 2 and 3. 相似文献