Are gait characteristics and ground reaction forces related to energy cost of running in elite Kenyan runners?     

J. Santos-Concejero  N. Tam  D. R. Coetzee  J. Oliván  T. D. Noakes  R. Tucker 《Journal of sports sciences》2017,35(6):531-538

The aim of this study was to determine whether gait cycle characteristics are associated with running economy in elite Kenyan runners. Fifteen elite Kenyan male runners completed two constant-speed running sets on a treadmill (12 km ·h^?1 and 20 km ·h^?1). VO₂ and respiratory exchange ratio values were measured to calculate steady-state oxygen and energy cost of running. Gait cycle characteristics and ground contact forces were measured at each speed. Oxygen cost of running at different velocities was 192.2 ± 14.7 ml· kg^?1· km^?1 at 12 km· h^?1 and 184.8 ± 9.9 ml· kg^?1· km^?1 at 20 km· h^?1, which corresponded to a caloric cost of running of 0.94 ± 0.07 kcal ·kg^?1·km^?1 and 0.93 ± 0.07 kcal· kg^?1· km^?1. We found no significant correlations between oxygen and energy cost of running and biomechanical variables and ground reaction forces at either 12 or 20 km· h^?1. However, ground contact times were ~10.0% shorter (very large effect) than in previously published literature in elite runners at similar speeds, alongside an 8.9% lower oxygen cost (very large effect). These results provide evidence to hypothesise that the short ground contact times may contribute to the exceptional running economy of Kenyan runners.  相似文献   

Later life learning experiences: listening to the voices of Chinese elders in Hong Kong     

Maureen Tam 《International Journal of Lifelong Education》2016,35(5):569-585

Abstract

Governments’ anxieties about ageing populations are mostly concerned with the costs of welfare, care and health provision which all have to be paid for by an ever dwindling working population. However, research in later life learning indicates the significant role that lifelong learning can play in promoting mental well-being and resilience, and in assisting with maintaining personal self-confidence and self-coping strategies that prevent cognitive decline in an ageing population. This paper draws on the research with a group of Chinese elders in Hong Kong, who provide information about their experiences and views on learning in later life, including the meaning of learning, barriers to participation, learning interests, needs, motivations, and instructional preferences. Both quantitative and qualitative findings are reported to shed light on later life learning experiences, which contribute to the global understanding of later life learning and serve to inform the development of policy and practice geared to the planning and provision of opportunities to keep learning at the later stages of life.  相似文献   

Acute fatigue negatively affects risk factors for injury in trained but not well-trained habitually shod runners when running barefoot     

Nicholas Tam  Devon R. Coetzee  Safwaan Ahmed  Robert P. Lamberts  Yumna Albertus-Kajee  Ross Tucker 《European Journal of Sport Science》2017,17(9):1220-1229

Introduction: Many factors may contribute to running-related injury. These include fatigue and footwear, the combination of which has rarely been studied, in particular with reference to barefoot running, recently advocated as a method to reduce injury risk. Methods: Twenty-two runners (12 well-trained and 10 trained) participated in a 10?km fatiguing trial. Knee and ankle joint kinematics and kinetics and electromyography were assessed during overground running in the barefoot and shod condition. This was performed pre- and post-fatigue using a motion capture system and force platforms. Results: Initial loading rate increased in the trained runners when barefoot but not shod. Shod knee stiffness increased in both groups after fatigue, whereas barefoot knee stiffness decreased only in the trained group. A reduction in barefoot bicep femoris pre-activation was found in both groups. During stance, a reduction in vastus lateralis and biceps femoris and an increase in tibialis anterior activity were found over time in both groups and conditions. Trained runners decreased gluteus medius and increased lateral gastrocnemius median frequency for both conditions after fatigue. Conclusion: When fatigued, gait adjustments in habitually shod runners may increase injury risk when running barefoot. Training status may be a risk factor for injury, as less-trained runners experience muscular fatigue changes that may compromise ground reaction force attenuation. Caution is recommended when transitioning to pure barefoot running.  相似文献   

Teachers Curating Virtual Exhibitions for Learning Visual Arts: A Study of Impact and Effectiveness     

Cheung-On Tam  Claire Ka-Yan Hui 《The International Journal of Art & Design Education》2023,42(3):469-485

Although visual arts teachers have free access to high quality online artwork images offering them immense teaching resources, making meaningful use of them remains a pedagogical challenge. During the COVID-19 pandemic, the transition from face-to-face to online teaching caused an immediate need for teachers to enhance their digital competencies and technological capability for planning and delivering a blended art curriculum. Herein, I propose a ‘teacher-curator pedagogy’ via a study in six primary and secondary schools in Hong Kong to assess its effectiveness. The study took place in the academic year of 2021-22 with 331 student participants. The proposed pedagogy puts visual arts teachers in the role of ‘digital curators’ who create virtual exhibitions for teaching art appreciation and artmaking. This paper addresses the theoretical framework, implementation strategies, and the results of the study highlighting its effectiveness, impact and limitations on teaching when using teacher-curated virtual exhibitions in both physical and virtual learning contexts. It was found that the technological capacity and confidence of the teacher participants was enhanced through the use of online resources and virtual exhibition tools. Making use of the 3D presentation of exhibits in themes and context through digital content curation, the teachers engaged students with deep interaction through the blending of online and face-to-face teaching. However, the proposed pedagogy was limited by the high demand of training and preparation work, hardware and software support, and difficulties in assessing and monitoring learning beyond class.  相似文献   

Integrating Creative Thinking Skills Pedagogies into a Higher Education Visual Arts Course     

Cheung On Tam 《The International Journal of Art & Design Education》2023,42(1):16-32

Although there has been increasing international emphasis on creativity in education, many creativity training programmes have focused on enhancing students' creative thinking skills with few studies on how these skills can be integrated into the teaching of subject disciplines. As a member of a Community of Practice project that ran from spring 2021 to summer 2022 at my university, I worked with ten university teachers from multiple disciplines to develop and implement instructional strategies to foster students' creative thinking skills. The paper documented the development, implementation and evaluation of creative thinking skills teaching strategies for a higher education course in visual arts. Both the development of the teaching strategies and the measurement of the impact on student learning have undergone vigorous research procedures and made reference to the existing literature. The effectiveness of the activities was assessed using multiple methods including the Torrance Test of Creative Thinking, a self-report inventory, and a focus group interview. The results indicated the new learning activities enhanced students' creative thinking skills. They also showed that creativity can be developed through teaching while revealing that playfulness, freedom and structure, group interactions, and problem-solving activities are beneficial for the development of creative thinking skills. Readers may better understand the different ways in which creative thinking skills instruction materials can be developed and incorporated into teaching of visual arts by making reference to the strategies suggested and the process of development in the paper.  相似文献   

Artificial intelligence and the Journal of Research in Science Teaching     

Troy D. Sadler  Felicia Moore Mensah  Jonathan Tam 《科学教学研究杂志》2024,61(4):739-743

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Universities,the Information Technology Challenge,and Open and Distance Learning in Central and Eastern Europe     

Tamás Lajos  András SzÛcs 《Higher Education in Europe》1998,23(2):177-185

The educational needs of eastern and central Europe can be met by distance education methods. The need to reform and to expand open and distance education possibilities led in 1990 to the founding in Budapest of EDEN, the European Distance Education Network. After 1990, the proponents of open and distance education were able to expand the scope of their activities as the result of expanding possibilities provided by the rapidly developing information and communication technologies. The pedagogical possibilities offered by these technologies are described with an emphasis on their democratizing tendencies, their ultimate inexpensiveness in terms of the total costs of different types of higher education, and their commercial possibilities. The setting up of the Distance Education Centre of the Technical University of Budapest is presented as a case study. Governments and institutions must find the best ways to use the information and communication technologies to integrate traditional higher education with open and distance learning techniques so as to offer the best possibilities at regional, national, and institutional levels.  相似文献   

On the temporal and behavioural consistency of pre-performance routines: an intra-individual analysis of elite basketball players' free throw shooting accuracy     

Lonsdale C  Tam JT 《Journal of sports sciences》2008,26(3):259-266

The effectiveness of pre-performance routines on skilled performance in a self-paced skill has yet to be verified. In this study, we examine the importance of temporal and behavioural consistency in these routines. The duration and specific pattern of behaviours exhibited before each free throw (n = 284) were observed during 14 National Basketball Association play-off games. An intra-individual standardized score was calculated for each shot's duration. Each player's dominant behavioural routine was identified and each shot was classified as "sequence followed" or "sequence not followed". No difference was observed in the success rates of shots associated with brief, long, and regular duration routines (P > 0.05). However, players were more successful when they followed their dominant behavioural sequence (83.77% success) than when they deviated from their specific behavioural pattern (71.43% success) (P < 0.05). The findings are interpreted in light of relevant theory and implications for practice are discussed.  相似文献   

The Perfect Marriage? – Language and Art Criticism in the Hong Kong Public Examination Context          下载免费PDF全文

Chung‐yim Lau  Cheung‐on Tam 《The International Journal of Art & Design Education》2017,36(1):61-70

Art education in Hong Kong has undergone various changes in response to educational reform. In art assessment, a major change in the Hong Kong New Senior Secondary (NSS) Curriculum is the inclusion of art criticism as a compulsory component of the new public examination. Assessing students’ abilities to interpret art in an art criticism public examination context is a critical issue in Hong Kong because the new senior secondary curriculum and assessment has brought attention to the role of written language in the art examination paper. This means the examination assesses not only students’ abilities to interpret art, but also their language abilities required to respond to art in written form. Since this new mode of assessment of art criticism has been published a number of issues have appeared. Recent studies show that teachers and students perceive this development negatively and they believe that the written format will assess students’ written language abilities rather than their critical abilities. These findings challenge the justification of the new art assessment policy and raise questions about the role of written language in responding to art. This article aims to raise the issue of the marriage between language and art criticism in the Hong Kong public examination context. It argues and examines the relationship of language to art interpretation, reasoning in the assessment, and issues in the public art criticism examination context. The issues addressed in this article provide opportunities for researchers and policy makers to reconsider and refine the new form of examination.  相似文献   

Surgeons as medical school educators: an untapped resource     

Haubert LM  Way D  DePhilip R  Tam M  Bishop J  Jones K  Moffatt-Bruce SD 《Anatomical sciences education》2011,4(4):182-189

Despite extensive experience teaching residents, surgeons are an untapped resource for educating medical students. We hypothesized that by involving surgeons as teachers earlier in the medical school curriculum, medical students' interest in surgery will increase and their opinions of surgeons will improve. Five programs designed to involve surgeons as educators in the medical school curriculum were implemented. The first program, started in 2008, introduced surgical faculty into the first-year medical student anatomy dissection laboratories. Other programs initiated in 2008 included: Surgical Clinical Correlates in Anatomy, which involved faculty teaching through cadaver surgery; Clinical Pathologic Conferences in Anatomy, a surgeon-led conference based on clinical cases; and a women's faculty-student mentorship program. Table Rounds, a surgeon-led anatomy review that used clinical scenarios to quiz students was begun in 2009. All five programs were successfully integrated into the medical school curriculum. While student opinion of surgeons as educators improved, there were no significant changes in student interest in surgery as a career nor change in performance on written examinations over the Anatomy content covered by the surgeons. Surgical faculty and trainees can be integrated into the medical school curriculum. Involving surgeons as educators earlier in the medical school curriculum may have longer term effects than could be observed in this study. At a minimum, the experience improved student opinion of surgeons as educators.  相似文献