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41.
Enrique Palou 《Journal of Food Science Education》2008,7(3):46-46
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Activity profile of top-class association football referees in relation to fitness-test performance and match standard 总被引:1,自引:1,他引:0
The aim of this study was to examine the kinematic activity profiles, cardiovascular responses and physical fitness of top-class football referees (n=11) during the FIFA Confederations Cup 2005. Computerised match-analyses (n=9) were performed with a two-dimensional photogrammetric video system, and the cardiovascular demand imposed on the referees (n=12) was measured using heart rate recordings. Total distance covered was 10,218, s=643 m of which 3531, s=510 m was covered at high intensities (>3.6 m.s(-1)). Both total distance covered (r2=0.59; P=0.02) and high-intensity activities (r2=0.44; P=0.05) were related to the distance covered by the ball in the same match. The referees ran at high speed 37% further (P=0.01) in the actual tournament than during under-17 top-level officiating. After the 5-min interval during which high-speed running peaked, in the following 5 min the performance was reduced by 19% (P=0.01) in relation to the mean of the game. Mean heart rate was 161, s=9 b.min(-1) (86, s=3% of maximal heart rate (HRmax)). Mean heart rate (expressed as percentage of HRmax) was related in part (r2=0.36; P<0.01) to the number of high-intensity activities performed in the same 5-min interval. The results of this study show that: (1) kinematic activity profiles of top-class referees can be influenced by the distance covered by the ball; (2) the amount of high-speed running (>5 m.s(-1)) best describes the physical performance of referees; (3) heart rate recording can be a useful tool to determine the most intense periods of a match and (4) the new fitness tests adopted by FIFA were poor predictors of match activities. 相似文献
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Alejandro Quiroga-Garza Rodrigo Teran-Garza Rodrigo Enrique Elizondo-Omaña Santos Guzmán-López 《Anatomical sciences education》2020,13(1):102-106
Clinical skills and medical knowledge enable physicians to overcome the uncertainty of emergent and rare clinical scenarios. Recently, a growing emphasis on evidence-based medicine (EBM) has flooded medical curricula of universities across the globe with guideline-based material, and while it has given teachers and students new tools to improve medical education, clinical reasoning must be reaffirmed in its capacity to provide physicians with the ability to solve unexpected clinical scenarios. Anatomical education in medical school should have two main objectives: to acquire anatomical knowledge and to develop the skill of applying that knowledge in clinical scenarios. The authors present a clinical scenario in which an unexpected and rare complication occurred during a routine elective hip replacement surgery. The general surgeon presiding over the case, also an anatomy professor, solved the problem using clinical reasoning and anatomical knowledge. It was a clear example of how clinical reasoning is key in approaching unprecedented, rare, or unknown complications. The intention of this scenario is to remind colleagues and medical schools that, although EBM is the standard, educators must uphold sound clinical reasoning to best prepare health care providers for their careers. 相似文献
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Marcos Gutiérrez-Davila Carmen Gutiérrez-Cruz Enrique Navarro 《European Journal of Sport Science》2017,17(8):1004-1012
The objectives of this study were to investigate the effect that the presence of two stimuli that require two different responses (dual-attention) has both, on offensive reaction-response time to a light stimulus, and on defensive response time when the stimulus is a real fencing attack. Twenty-five elite fencers and a fencing master were included in the study. The equipment included four force plates adapted to a scaffold that served as a fencing piste. Two force plates were placed, at the start position, under the fencer’s feet and another two plates were placed under the master’s feet. The results demonstrate that choice reaction time to visual stimuli increases in dual-task conditions with respect to simple reaction time, whereas the mean horizontal force tends to decrease in dual-task. However, when the stimulus was an opponent’s movement, dual-task conditions did not have any effect on the time required to initiate a defensive action. The changes in reaction time when real movements were used as stimuli challenge the validity of the reaction time to visual stimuli paradigm as a predictor of performance in fencing. Also, the results obtained demonstrate that perceptual and attentional processes play a major role in fencer performance in real competition. 相似文献
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Ethnic Differences in Associations Among Popularity,Likability, and Trajectories of Adolescents' Alcohol Use and Frequency 下载免费PDF全文
Sophia Choukas‐Bradley Matteo Giletta Enrique W. Neblett Mitchell J. Prinstein 《Child development》2015,86(2):519-535
Two‐part latent growth models examined associations between two forms of peer status (popularity, likability) and adolescents' alcohol use trajectories throughout high school; ethnicity was examined as a moderator. Ninth‐grade low‐income adolescents (N = 364; Mage = 15.08; 52.5% Caucasian; 25.8% African American; 21.7% Latino) completed sociometric nominations of peer status and aggression at baseline, and reported their alcohol use every 6 months. After controlling for gender, aggression, ethnicity, and socioeconomic status, popularity—but not likability—prospectively predicted alcohol use trajectories. However, these effects were moderated by ethnicity, suggesting popularity as a risk factor for alcohol use probability and frequency among Caucasian and Latino, but not African American adolescents. Results suggest that developmental correlates of peer status should be considered within cultural context. 相似文献
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OBJECTIVE: The aim of this study is to determine: (1) the differences between Spanish and Colombian cultures in relation to community social support variables, and (2) the relationships between community social support variables and child maltreatment in both cultures. METHOD: The study was based on 670 nonabusive families and 166 abusive families. The parents were asked to complete the Community Social Support Questionnaire. This instrument measures community social support in terms of Community Integration and Satisfaction, membership in voluntary organizations and community participation, and use of Community Resources of Social Support. RESULTS: Differences between both cultures were found in the pattern of community social support for the nonabusive groups. However, the relationships between community social support and child maltreatment were similar cross-culturally. Our results indicate that in both cultures abusive parents show lower levels of community integration, participation in community social activities and use of formal and informal organizations than the parents that provide adequate care. CONCLUSIONS: The results largely support the literature that has repeatedly reported the link between social isolation and child maltreatment and they confirm this relation within two cultural contexts, Colombian and Spanish, quite different from the Anglo-Saxon context, where most of the previous studies have been carried out. 相似文献
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This article, based on the testimonio of a Latino DACAmented teacher, underscores the impacts and benefits of immigration policies for individuals and their communities. Deferred Action for Childhood Arrivals (DACA) has benefitted about 750,000 people; most have used the benefits to pursue higher education and to enter public service careers, including teaching and nursing. Mr. Juárez’s testimonio walks us through his educational trajectory and current role as an educator. This testimonio contributes to current debates and struggles demanding the new U.S. presidential administration to maintain DACA. As researchers, we urge students, educators, policymakers, and the incoming administration to listen to the testimonios of DACA beneficiaries prior to making hasty decisions that will have dire consequences for individuals, families, and the nation, as a whole. 相似文献
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Julia Menard-Warwick Eric Ruiz Bybee Enrique David Degollado Sophia Jin Shannon Kehoe Katherine Masters 《Journal of Language, Identity & Education》2019,18(6):364-376
ABSTRACTOur paper contends that growing awareness of the historicity of English lies at the heart of the process by which English language teachers develop “critical” identities. We compare novice teachers in three different contexts of English teaching: urban Guatemala, rural Nicaragua, and a Tibetan refugee community in India. Collectively, these ethnographic case studies illustrate the complexity of English teacher identity formation in contemporary global society, as our participants developed new understandings of their positions in history, their relationships with English learners, and the local meanings around English as symbolic capital. 相似文献