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排序方式: 共有158条查询结果,搜索用时 15 毫秒
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Alessandro Moura Zagatto Paulo Eduardo Redkva Rodrigo Araújo Bonetti de Poli Joel Abraham Martinez González Jeniffer Zanetti Brandani Thiago Penedo 《European Journal of Sport Science》2019,19(5):645-652
The purpose of this study was to investigate the use of a single 3-min all-out maximal effort to estimate anaerobic capacity (AC) through the lactate and excess post-exercise oxygen consumption (EPOC) response methods (AC[La?]+EPOCfast) on a cycle ergometer. Eleven physically active men (age?=?28.1?±?4.0?yrs, height?=?175.1?±?4.2?cm, body mass?=?74.8?±?11.9?kg and ?O2max?=?40.7?±?7.3?mL?kg?1?min?1), participated in the study and performed: i) five submaximal efforts, ii) a supramaximal effort at 115% of intensity of ?O2max, and iii) a 3-min all-out maximal effort. Anaerobic capacity was estimated using the supramaximal effort through conventional maximal accumulated oxygen deficit (MAOD) and also through the sum of oxygen equivalents from the glycolytic (fast component of excess post-exercise oxygen consumption) and phosphagen pathways (blood lactate accumulation) (AC[La?]+EPOCfast), while during the 3-min all-out maximal effort the anaerobic capacity was estimated using the AC[La?]+EPOCfast procedure. There were no significant differences between the three methods (p?>?0.05). Additionally, the anaerobic capacity estimated during the 3-min all-out effort was significantly correlated with the MAOD (r?=?0.74; p?=?0.009) and AC[La?]+EPOCfast methods (r?=?0.65; p?=?0.029). Therefore, it is possible to conclude that the 3-min all-out effort is valid to estimate anaerobic capacity in physically active men during a single cycle ergometer effort. 相似文献
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Kay Martinez 《Asia-Pacific Journal of Teacher Education》2008,36(1):35-51
This paper is a reflective exploration of major challenges facing new teacher educators as they make the transition into the academy, and of ways that best support them. The transition problems identified in the emerging body of literature about teacher educator career entry were offered for comment to a small group of new teacher educators in an Australian regional university. Their responses added complexity and nuance, suggesting a heterogeneity of entry pathways and experiences, as well as avenues for further inquiry. Consideration of the resulting issues leads to wider questions about the place of teacher education in the academy. In turn, this leads to question if the challenges faced by newly appointed teacher educators are distinctive from those experienced by all new academics. The paper argues for multidisciplinary cohorts for induction, and makes recommendations for systematic, inclusive induction programs for all new academics, including teacher educators. The paper concludes with two further recommendations. First, large‐scale research is required to inform us about the contemporary teacher education workforce. Little is currently known about entry and career pathways, nor of the impact of recent policy and funding changes such as research performativity measures and increasing employment of sessional staff. Second, induction must be seen as an organisational and professional responsibility shared by many, including new and experienced academics, faculties, departments, institutions and professional associations. 相似文献
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Juanita Gamez Vargas Rick Roach Kevin M. David 《Community College Journal of Research & Practice》2014,38(2-3):166-173
The article presents the implementation and findings of a successful collaborative effort with the Oklahoma State Regents for Higher Education (OSRHE), Tulsa Community College (TCC), and two local public school districts, Tulsa Public Schools (TPS) and Union Public Schools (UPS). Known as EXCELerate, it's a five-semester dual enrollment pilot program that received state policy exceptions for juniors and seniors to enroll in dual enrollment courses and supportive resources from the participating agencies. Whereas the traditional dual enrollment student is White and college-going, the program's intent was to increase the number of high school students who may be first-generation, lower-socioeconomic, ethnic or non-ethnic. The article identifies three major barriers to successful dual enrollment and completion: state policy, financial issues, and transportation. It also examines how these barriers were eliminated through a collaborative effort. The results demonstrate that over 87% of the juniors and seniors persisted over the semesters, and enrollment tripled among African American and Latino students. The article is constructed to benefit further research and practical application for urban and rural community colleges. 相似文献
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S A Al-Abood K Davids S J Bennett D Ashford M Martinez Marin 《Journal of sports sciences》2001,19(7):507-520
In the visual perception perspective of observational learning, the manipulation of relative and absolute motion information in visual demonstrations optimally directs learners' search towards appropriate task solutions. We assessed the effect of emphasizing transformational information and removal of structural information using point-light kinematic displays in approximating the model's relative motion patterns. Participants viewed computer-simulated point-light demonstrations or normal video demonstrations before and intermittently throughout 100 acquisition trials with knowledge of results on an underarm modified-dart aiming task. On the next day, all participants performed 20 retention trials without demonstrations. The kinematics of spatial and temporal coordination and control variables were examined relative to the model's action, as well as performance scores. The results indicated that approximation of the model's spatial and temporal coordination and control patterns was achieved after observation of either type of demonstrations. No differences were found in movement outcomes. In a second experiment, the effects of manipulating absolute motion information by slow-motion demonstrations were examined relative to real-time demonstrations. Real-time demonstrations led to a closer approximation to the model's spatial and temporal coordination patterns and better outcome scores, contradicting predictions that slow-motion displays convey intact relative motion information. We speculate that the effect of visual demonstration speed on action perception and reproduction is a function of task constraints--that is, novelty or familiarity of relative motion of demonstrated activities. 相似文献