The accuracy and precision of DXA for assessing body composition in team sport athletes     

Johann Christopher Bilsborough  Kate Greenway  David Opar  Steuart Livingstone  Justin Cordy  Aaron James Coutts 《Journal of sports sciences》2013,31(19):1821-1828

Abstract

This study determined the precision of pencil and fan beam dual-energy X-ray absorptiometry (DXA) devices for assessing body composition in professional Australian Football players. Thirty-six professional Australian Football players, in two groups (fan DXA, N = 22; pencil DXA, N = 25), underwent two consecutive DXA scans. A whole body phantom with known values for fat mass, bone mineral content and fat-free soft tissue mass was also used to validate each DXA device. Additionally, the criterion phantom was scanned 20 times by each DXA to assess reliability. Test–retest reliability of DXA anthropometric measures were derived from repeated fan and pencil DXA scans. Fat-free soft tissue mass and bone mineral content from both DXA units showed strong correlations with, and trivial differences to, the criterion phantom values. Fat mass from both DXA showed moderate correlations with criterion measures (pencil: r = 0.64; fan: r = 0.67) and moderate differences with the criterion value. The limits of agreement were similar for both fan beam DXA and pencil beam DXA (fan: fat-free soft tissue mass = ?1650 ± 179 g, fat mass = ?357 ± 316 g, bone mineral content = 289 ± 122 g; pencil: fat-free soft tissue mass = ?1701 ± 257 g, fat mass = ?359 ± 326 g, bone mineral content = 177 ± 117 g). DXA also showed excellent precision for bone mineral content (coefficient of variation (%CV) fan = 0.6%; pencil = 1.5%) and fat-free soft tissue mass (%CV fan = 0.3%; pencil = 0.5%) and acceptable reliability for fat measures (%CV fan: fat mass = 2.5%, percent body fat = 2.5%; pencil: fat mass = 5.9%, percent body fat = 5.7%). Both DXA provide precise measures of fat-free soft tissue mass and bone mineral content in lean Australian Football players. DXA-derived fat-free soft tissue mass and bone mineral content are suitable for assessing body composition in lean team sport athletes.  相似文献   

Eight-Week Traditional Mat Pilates Training-Program Effects on Adult Fitness Characteristics     

Kate Rogers  Ann L. Gibson 《Research quarterly for exercise and sport》2013,84(3):569-574

We investigated responses of adult, novice practitioners (n = 9) to an 8-week traditional mat Pilates program (P) that met 1 hr/day three times/week. Classes consisted primarily of beginner and intermediate level exercises. Compared to an active control group (C; n = 13) that showed no improvements, those in P significantly (p < .05) improved relative body fat (-1.2%BF), sit-and-reach (+7.5 cm), shoulder reach (+6.9 cm), curl-up (+14 reps), and low back extension (+7 reps) scores, as well as circumferences at the waist (-2.7 cm), chest (-1.7 cm), and arm (-0.5 cm). Baseline differences were noted only for curl-ups and low back extensions, with P being lower than C. Body composition, muscular endurance, and flexibility significantly improved after 8 weeks of traditional mat Pilates.  相似文献   

让移动终端拥有上千个微处理器?     

Kate Greene 《中国教育网络》2007,(5):34-35

开发多核处理器技术2007年4月初,英特尔公司宣布了一项令人惊讶的研究项目:压缩在一块小小芯片上的第一台可编程超大型计算机。该公司展示了一个拥有80个处理器的芯片,这些处理器在被程序化之后,每秒能进行  相似文献   

Building reading resilience: re-thinking reading for the literary studies classroom     

Kate Douglas  Tully Barnett  Anna Poletti  Judith Seaboyer  Rosanne Kennedy 《高等教育研究与发展》2016,35(2):254-266

This paper introduces the concept of ‘reading resilience’: students’ ability to read and interpret complex and demanding literary texts by drawing on advanced, engaged, critical reading skills. Reading resilience is a means for rethinking the place and pedagogies of close reading in the contemporary literary studies classroom. Our research was across four Australian universities and the first study of its kind in the Australian context. We trialled three working strategies to support students to become consistent and skilled readers, and to equip teachers with methods for coaching reading: ‘setting the scene’ for reading, surveying students on their reading experiences and habits, and rewarding reading within assessment. We argue that the nature and pedagogy of close reading has not been interrogated as much as it should be and that the building of reading resilience is less about modelling or outlining best practice for close reading (as has traditionally been thought) and more about deploying contextual, student-centred teaching and learning strategies around reading. The goal is to encourage students to develop a broad suite of skills and knowledge around reading that will equip them long term (for the university and beyond). We measured the effectiveness of our strategies through seeking formal and informal student feedback, and through students’ demonstration of skills and knowledge within assessment.  相似文献   

Formatively assessing prospective teachers’ skills in leading mathematics discussions     

Shaughnessy  Meghan  Garcia  Nicole M.  O’Neill  Michaela Krug  Selling  Sarah Kate  Willis  Amber T.  Wilkes  Charles E.  Salazar  Sabrina Bobsin  Ball  Deborah Loewenberg 《Educational Studies in Mathematics》2021,108(3):451-472

Educational Studies in Mathematics - Mathematics discussions are important for helping students to develop conceptual understanding and to learn disciplinary norms and practices. In recent years,...  相似文献   

Understanding metacognition through the use of pupil views templates: Pupil views of Learning to Learn     

Kate Wall   《Thinking Skills and Creativity》2008,3(1):23-33

As part of the Learning to Learn Phase 3 Evaluation [for full detail see Higgins, S., Wall, K., Baumfield, V., Hall, E., Leat, D., Moseley, D., et al. (2007). Learning to Learn in Schools Phase 3 Evaluation: Final Report. London: Campaign for Learning. Available at: www.campaignforlearning.org.uk; Higgins, S., Wall, K., Falzon, C., Hall, E., Leat, D., Baumfield, V., et al. (2005). Learning to Learn in Schools Phase 3 Evaluation Year One Final Report. London: Campaign for Learning. Available at: http://www.campaignforlearning.org.uk; Higgins, S., Wall, K., Baumfield, V., Hall, E., Leat, D., Woolner, P. et al. (2006). Learning to Learn in Schools Phase 3 Evaluation: Year Two Report. London: Campaign for Learning. Available at: http://www.campaignforlearning.org.uk] teachers across three Local Authorities in England were supported in using an approach fitting ideas of professional enquiry through action research [Baumfield, V., Hall, E., & Wall, K. (2008). Action research in the classroom. London: Sage]. In this complex project, teachers have explored different innovations that they believe to fit under the umbrella term of Learning to Learn, implementing and investigating approaches ranging from cooperative learning [Kagan, S. (2001). Cooperative learning. Kagan Publishing. www.Kaganonline.com] to Assessment for Learning [Black, P. J. & Wiliam, D. (1998). Assessment and classroom learning. Assessment in Education, 5, 7–73] to Thinking Skills [Baumfield, V. & Higgins, S. (1997). ‘But no one has maths at a party: Pupils’ reasoning strategies in a thinking skills programme. Curriculum, 18(3), 140–148]. As part of these enquiries teachers have increasingly involved pupils and their perspective for providing critical insight to processes associated with Learning to Learn. This corresponds to debates around pupil voice [for example, Flutter, J. & Ruddock, J. (2004). Consulting pupils: What's in it for schools? London: Routledge Falmer], and also the fact that teachers in the project see pupils as having characteristics that can support the development of a Learning to Learn philosophy [Hall, E., Leat, D., Wall, K., Higgins, S., & Edwards, G. (2006) Learning to Learn: Teacher research in the zone of proximal development. Teacher Development, 10(2)] This paper will use the method of pupil views templates [Wall, K. & Higgins, S. (2006). Facilitating and supporting talk with pupils about metacognition: A research and learning tool. International Journal of Research and Methods in Education, 29(1), 39–53] used by teachers as a pragmatic tool [Baumfield, V., Hall, E., Higgins, S., & Wall, K. (2007). Tools for enquiry and the role of feedback in teachers’ learning. Paper presented at the European Association for Research in Learning and Instruction Conference] to research pupils’ perspectives of Learning to Learn and the processes they perceive to be involved. It will use an analysis frame to examine and explore data about pupils’ declarative knowledge of the process of learning and therefore aspects of their metacognitive knowledge and skilfulness [Veenman, M. V. J. & Spaans, M. A. (2005). Relation between intellectual and metacognitive skills: Age and task difference. Learning and Individual Differences, 15, 159–176].  相似文献   

A history of the future of higher education for sustainable development   总被引：2，自引：2，他引：0  

Kate Sherren 《Environmental Education Research》2008,14(3):238-256

Thirty years of academic dialogue and reinvention about environmental and sustainability education conceals the consistency of rhetoric that literature holds. This paper argues that higher education for sustainable development does not call for the invention of anything disconcertingly new. In fact, four simple, long‐standing concepts contribute most of the philosophy, disciplinary content and pedagogy required: liberal education, interdisciplinarity, cosmopolitanism and civics. A review is undertaken of the literature behind these ‘ideas neither young nor mature’ and a sustainability canon is derived that features integrated sciences, humanities and social sciences theory, engaging, active pedagogy and authentic external experiences.  相似文献   

Politics,media and youth: understanding political socialization via video production in secondary schools     

Kate Dunsmore 《Learning, Media and Technology》2008,33(1):1-10

Research on the lack of civic and political engagement on the part of today’s youth has relied on traditional, often quantitative, measures of political knowledge that may miss important elements of the process. Using an ethnographic approach with a group of inner‐city high school students, our study reveals a richer construction of students’ awareness of political issues, or political socialization than previously documented by conventional survey measures. Notably present is a sophisticated awareness of and identification with non‐news television formats which suggests that sources such as TV talk and reality shows may be important sources of political discourse and even civic engagement. Our study also supports the value of hands‐on media production projects for understanding youth political knowledge and awareness, suggesting an additional tool for political communication and civic engagement research.  相似文献   

The priorities established among data sources when instructional designers revise written materials     

Kate Le Maistre  Cynthia Weston 《Educational technology research and development : ETR & D》1996,44(1):61-70

The objective of the study was to investigate the priorities instructional designers establish among data sources when they revise written materials and the relationship of their practice to standard models of formative evaluation. Two modules of printed instructional material were revised by each of eight experienced instructional designers under three treatment conditions, using a counterbalanced design. Data were collected using a think-aloud procedure. The think-aloud protocol was segmented, coded and analysed. Results show that instructional designers were significantly more likely to incorporate their own knowledge into revisions than to use feedback data, and when they did use feedback data, they preferred learner comments. They did not accurately assess their use of their own knowledge or of feedback data; they thought they used feedback data more than the results showed. These instructional designers reflected some aspects of the standard instructional design model when they revised instructional materials, but their experience has caused many of the procedures to become internalized, so they are invisible in the protocols. This research was funded in part by a grant from the Social Sciences and Humanities Research Council of Canada.  相似文献   

Lessons Learned from PISA: A Systematic Review of Peer-Reviewed Articles on the Programme for International Student Assessment     

Therese N. Hopfenbeck  Jenny Lenkeit  Yasmine El Masri  Kate Cantrell  Jeanne Ryan  Jo-Anne Baird 《Scandinavian Journal of Educational Research》2018,62(3):333-353

International large-scale assessments are on the rise, with the Programme for International Student Assessment (PISA) seen by many as having strategic prominence in education policy debates. The present article reviews PISA-related English-language peer-reviewed articles from the programme’s first cycle in 2000 to its most current in 2015. Five literature bases were searched, and results were analysed with SPSS. Results map the frequency of publications according to journal, country, and scientific discipline. They also summarise major themes within three identified categories: secondary analysis, policy impact, and critiques. Findings indicated that studies based on the PISA dataset has led to progress in educational research while simultaneously pointing to the need for caution when using this research to inform educational policy.  相似文献