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1.
Vassilios Gourgoulis Alexia Boli Nikolaos Aggeloussis Panagiotis Antoniou Argyris Toubekis Georgios Mavromatis 《Journal of sports sciences》2015,33(7):696-712
The aim of this study was to assess the effect of the hand’s acceleration on the propulsive forces and the relative contribution of the drag and lift on their resultant force in the separate phases of the front crawl underwater arm stroke. Ten female swimmers swam one trial of all-out 25-m front crawl. The underwater motion of each swimmer’s right hand was recorded using four camcorders and four periscope systems. Anatomical landmarks were digitised, and the propulsive forces generated by the swimmer’s hand were estimated from the kinematic data in conjunction with hydrodynamic coefficients. When the hand’s acceleration was taken into account, the magnitude of the propulsive forces was greater, with the exception of the mean drag force during the final part of the underwater arm stroke. The mean drag force was greater than the mean lift force in the middle part, while the mean lift force was greater than the mean drag force in the final part of the underwater arm stroke. Thus, swimmers should accelerate their hands from the beginning of their backward motion, press the water with large pitch angles during the middle part and sweep with small pitch angles during the final part of their underwater arm stroke. 相似文献
2.
Alexia Buono 《Pedagogies: An International Journal》2019,14(2):150-168
There has been considerable distress in early childhood classrooms due to a cultural bias of Cartesian dualism, which has led to the bullying and disappearance of Body in education. Efforts of bringing about shifts in pedagogical practices toward holistic, bodily views of the self must be supported and developed. However, with classrooms that are filled with less movement and play, the marginalization of Body is of major concern. Interdisciplinary educational settings may be rich in exposing potentials and challenges of a nondual pedagogy implemented in unconsciously dualistic classroom cultures. The purpose of this article is to describe the barriers to implementation of a Mindfully Somatic Pedagogy, as well as affordances to young children throughout a preschool yoga class over an academic year. This research provides a basis for understanding how a Mindfully Somatic Pedagogy can curate holistic, first-person experiences of young children’s bodily selves within a classroom. Likewise, differing expectations of Body from adults in classrooms can lead to mixed messages for children. Understanding how bodily experiences afford young children’s development and teachers responses to Body in the classroom is informative in understanding the roles a school culture can have on the relationship between child development and teacher pedagogy. 相似文献
3.
Inflatable balls and cushions made of non-latex rubber can provide alternatives to sitting on the floor/ground or classroom chairs. This study tested the effect of inflatable cushions (wiggle cushions) placed on the floor for seating during circle time in typical preschool classrooms. The effect on attention was tested using alternating periods of usual seating and wiggle cushions. Four preschool classrooms (n = 25) were utilized, with two randomly assigned to the intervention condition (n = 15) and two as control (n = 10). Circle time was led by classroom teachers. Preschoolers’ engagement was rated using five subscales of the Child Behavior Rating Scale (Mahoney and Wheeden 1999), a five-point Likert-type scale, from video recordings of a uniformly structured seven-minute period at the beginning of circle time. With use of wiggle cushions, there were statistically significant improvements in Attention and Persistence subscales (p = .002, .026 respectively). Teachers provided positive feedback for the intervention, indicating social validity. Results provide support for the use of wiggle cushions to enhance engagement during preschool circle time. 相似文献
4.
ABSTRACTThis case study presents a conceptual model of researcher performance developed by Deakin University Library, Australia. The model aims to organize research performance data into meaningful researcher profiles, referred to as researcher typologies, which support the demonstration of research impact and value. Three dimensions shaping researcher performance are identified: researcher practices, career stage, and activity space. We argue this model serves two practical functions for Deakin Library and librarians: (a) to develop a holistic understanding of what constitutes researcher performance in the contemporary higher education environment in Australia; and (b) to translate this understanding into a service needs diagnostic tool for the development of the Research Metrics and Advisory Service (ReMAS), a strategic library service providing systematic research metrics support to Deakin researchers, schools, and faculties. We argue that both the model and its practical applications may be adapted by other academic libraries within their national and higher education contexts. 相似文献
5.
Carl M. McGown Robert K. Conlee Anthony A. Sucec Michael J. Buono William Phillips 《Research quarterly for exercise and sport》2013,84(2):196-200
Abstract This study focused on the differences between experienced and inexperienced physical education teachers' approaches to planning, low inference indicators of teaching behavior during instruction, and global variables from the Beginning Teacher Evaluation Study. It was found experienced teachers asked many more questions before they began planning than did inexperienced teachers. Experienced teachers' plans reflected a concern about contingencies that might arise during instruction, whereas inexperienced teachers' plans did not. Interaction analysis and codings of student engagement showed marked differences between experienced and inexperienced teachers. Judging the qualities of experienced and inexperienced teachers also showed important differences. These sources of data are interrelated and give a vivid picture of how experienced and inexperienced teachers differ in accomplishment of instruction. The findings are discussed in terms of what they may mean for teacher development programs. 相似文献
6.
Jack H. Wilmore Anne E. Atwater Bess D. Maxwell Dorothy L. Wilmore Stefan H. Constable Michael J. Buono 《Research quarterly for exercise and sport》2013,84(1):90-92
Tennis is an activity requiring both endurance and anaerobic components, which could have immunosuppressive effects postexercise. Purpose The purpose of this investigation was to determine the effect of a simulated tennis match on apoptotic and migratory markers on lymphocyte subsets. Method Male high school (n = 5) and college (n = 3) tennis players (M age = 18.9 ± 3.3 years) completed 10 sets of a tennis protocol including serves, forehand strokes, and backhand groundstrokes with 1-min rest periods between sets. Apoptosis antigen 1 receptor (CD95) and chemokine receptor fractalkine (CX3CR1) expression was analyzed on helper T lymphocytes (CD4+), cytotoxic T lymphocytes (CD8+), and B lymphocytes (CD19+) twice, at resting baseline and immediately after all 10 sets of the tennis protocol. Results An increase was observed in each lymphocyte subtype (p < .02, effect size = .41), and comparison of absolute changes revealed increases in CD4+/CD95+, CD8+/CD95+, and CD8+/CX3CR1 lymphocytes following the tennis protocol (p < .01, effect size = .43), but not in CD19+ cells. Conclusions A simulated tennis match has adequate intensity to induce immune modulations in terms of increased cell death and cellular migration in T lymphocyte subsets. Lymphocytopenia following tennis play is influenced by both apoptotic and migratory mechanisms. 相似文献
7.
Ramadhan Arief Hidayanto Achmad Nizar Salsabila Ghina Almira Wulandari Intan Jaury Jessica Alexia Anjani Nadia Nabila 《Education and Information Technologies》2022,27(2):1489-1522
Education and Information Technologies - E-Learning has been massively used in higher education, one of which is in Universitas Indonesia. The e-learning system in Universitas Indonesia is called... 相似文献
8.
Bonnie Pang Valeria Varea Sarah Cavallin Alexia Cupac 《Sport, Education and Society》2013,18(8):801-813
ABSTRACTDigital technologies are now considered important in shaping young people's engagement in and with health and physical activity. Recent discussions show that the use of digital technologies to track health and fitness may over-emphasize the linear understanding of the body and health generally underpinned by Western health ideologies such as healthism. Other studies have shown the increased use of digital technologies in teaching Health and Physical Education (HPE) and as a means to enhance health and increase physical activity. Despite the opportunities and risks apparent in these studies, little is known about how HPE students make choices, negotiate, and resist or embrace the digitalisation of physical activity, exercise, and more broadly health. This study examines HPE students’ meaning making of risk and surveillance associated with the self-digitisation of exercise. The study further investigates how the concept of ‘prosumption’; the production, curation and consumption of self-data within the context of digitised health and physical activity, is understood. Based on the findings, we have constructed a typology of prosumers that can be used as a pedagogical device to illustrate the various kinds of subject positions students take up with digital technology in health and physical activity. This study extends the current understanding of prosumers by identifying the ‘ambivalent prosumer’. The results provide insights that have direct pedagogical implications in HPE teacher education specifically in the areas of knowledge production and consumption of knowledge through digital technology in health and physical activity. 相似文献
9.
L D Gross J F Sallis M J Buono J J Roby J A Nelson 《Research quarterly for exercise and sport》1990,61(4):321-325
The Seven-Day Physical Activity Recall interview is commonly used in epidemiologic research, but the methods of training and certifying interviewers have not been studied or standardized. The purpose of this study was to examine the reliability of the Seven-Day Physical Activity Recall interviews after a structured training program. Twenty-one volunteer interviewers participated in a five-session group training program that targeted standardized interview techniques and scoring procedures. Interviewers scored eight videotaped interviews on two occasions to assess scoring skills. Across all videotapes and interviewers, the test-retest reliability was .99. Two interviewers independently interviewed the same person on the same day, and the reliability of kilocalorie expenditure across interviewers was .86. It was concluded that naive individuals can be taught to reliably conduct and score the Seven-Day Physical Activity Recall interview in a brief training program. 相似文献
10.
Alexia Antzaka Clara Martin Sendy Caffarra Sophie Schlöffel Manuel Carreiras Marie Lallier 《Reading and writing》2018,31(3):583-605
The present study investigated whether orthographic depth can increase the bias towards multi-letter processing in two reading-related skills: visual attention span (VAS) and rapid automatized naming (RAN). VAS (i.e., the number of visual elements that can be processed at once in a multi-element array) was tested with a visual 1-back task and RAN was measured in a serial letter naming task that introduced a novel manipulation (some letter sequences formed frequent words). Spanish-Basque and French-Basque bilingual children were tested at early (30 children in 1st and 2nd grade), and more advanced (24 children in 3rd, 4th and 5th grade) stages of reading acquisition to investigate whether they would be differently biased towards multi-letter processing due to reading in two shallow (Spanish, Basque), or a deep and a shallow (French, Basque) orthography. The French-Basque bilinguals, who read in a deep orthography, were expected to rely on larger orthographic units in reading and thus to be more biased towards multi-letter processing in both tasks. This was expected to be reflected by: (a) a uniform distribution of attention across letter strings in the VAS task, and (b) a greater interference of the embedded words on letter-by-letter naming in RAN, leading to longer naming times. The expected group differences were observed in the more advanced readers, with French-Basque bilinguals showing a wider distribution of VAS across letter strings and longer naming times in RAN. 相似文献