Associations between prolonged sedentary time and breaks in sedentary time with cardiometabolic risk in 10–14-year-old children: The HAPPY study     

Daniel P. Bailey  Sarah J. Charman  Thomas Ploetz  Louise A. Savory  Catherine J. Kerr 《Journal of sports sciences》2017,35(22):2164-2171

This study examines the association between prolonged sedentary time and breaks in sedentary time with cardiometabolic risk in 10–14-year-old children. This cross-sectional design study analysed accelerometry-determined sedentary behaviour and physical activity collected over 7 days from 111 (66 girls) UK schoolchildren. Objective outcome measures included waist circumference, fasting lipids, fasting glucose, blood pressure, and cardiorespiratory fitness. Logistic regression was used for the main data analysis. After adjustment for confounders, the odds of having hypertriglyceridaemia (P = 0.03) and an increased clustered cardiometabolic risk score (P = 0.05) were significantly higher in children who engaged in more prolonged sedentary bouts per day. The number of breaks in sedentary time per day was not associated with any cardiometabolic risk factor, but longer mean duration of daily breaks in sedentary time were associated with a lower odds of having abdominal adiposity (P = 0.04) and elevated diastolic blood pressure (P = 0.01). These associations may be mediated by engagement in light activity. This study provides evidence that avoiding periods of prolonged uninterrupted sedentary time may be important for reducing cardiometabolic disease risk in children.  相似文献   

Critical Theory and Visual Practice in the Art School     

Louise Parsons 《The International Journal of Art & Design Education》1999,18(2):149-153

This paper reflects upon the recent debates concerning the relationship between theory and practice in British art schools. Much has been done during the last two decades by artists, academics, writers and exhibition curators to bridge the traditional polarization between thinking and making. Underlying this venture is the keenly felt conviction that our task as teachers is to work with our students to develop creative practices which make a difference – particularly in relation to how we might use the arts to reformulate the ways in which we articulate our sense of self in a wider social and political context. In the last thirty years we have witnessed a sea change in art schools. The formerly inward looking reclusive art school culture is now inhabited by groups and individuals who are engaged in the everyday concerns of consumer culture and are committed to, first of all, harness creative production as an agent of change and, second, reject the notion that art practice is divorced from theoretical concerns.  相似文献   

Physiological responses to 1000-m ergometer time-trial performance in outrigger canoeing     

Kerr R  Spinks W  Leicht A  Sinclair W  Woodside L 《Journal of sports sciences》2008,26(11):1219-1223

Graded exercise tests are commonly used to assess peak physiological capacities of athletes. However, unlike time trials, these tests do not provide performance information. The aim of this study was to examine the peak physiological responses of female outrigger canoeists to a 1000-m ergometer time trial and compare the time-trial performance to two graded exercise tests performed at increments of 7.5 W each minute and 15 W each two minutes respectively. 17 trained female outrigger canoeists completed the time trial on an outrigger canoe ergometer with heart rate (HR), stroke rate, power output, and oxygen consumption (VO2) determined every 15 s. The mean (+/- s) time-trial time was 359 +/- 33 s, with a mean power output of 65 +/- 16 W and mean stroke rate of 56 +/- 4 strokes min(-1). Mean values for peak VO2, peak heart rate, and mean heart rate were 3.17 +/- 0.67 litres min(-1), 177 +/- 11 beats min(-1), and 164 +/- 12 beats min(-1) respectively. Compared with the graded exercise tests, the time-trial elicited similar values for peak heart rate, peak power output, peak blood lactate concentration, and peak VO2. As a time trial is sport-specific and can simultaneously quantify sprint performance and peak physiological responses in outrigger canoeing, it is suggested that a time trial be used by coaches for crew selection as it doubles as a reliable performance measure and a protocol for monitoring peak aerobic capacity of female outrigger canoeists.  相似文献   

Internationalisation,Mobility and Metrics: A New Form of Indirect Discrimination?     

Louise Ackers 《Minerva》2008,46(4):411-435

This paper discusses the relationship between internationalisation, mobility, quality and equality in the context of recent developments in research policy in the European Research Area (ERA). Although these developments are specifically concerned with the growth of research capacity at European level, the issues raised have much broader relevance to those concerned with research policy and highly skilled mobility. The paper draws on a wealth of recent research examining the relationship between mobility and career progression with particular reference to a recently completed empirical study of doctoral mobility in the social sciences (Ackers et al. Doctoral Mobility in the Social Sciences. Report to the NORFACE ERA-Network, 2007). The paper is structured as follows. The first section introduces recent policy developments including the European Charter for Researchers and Code of Conduct for the Recruitment of Researchers and the European Commission’s Green Paper on the ERA. The discussion focuses on concerns around the definition of ‘mobility’ and the tendency (in both policy circles and academic research) to conflate different forms of mobility and to equate these with notions of excellence or quality. Scientific mobility is shaped as much by ‘push’ factors (limited opportunity) as it is by the ‘draw’ of excellence. Scientists are exercising a degree of ‘choice’ within a specific and individualised framework of constraints. The following sections consider some of the ‘professional’ and ‘personal’ factors shaping scientific mobility and the influence that these have on the relationship between mobility, internationalisation and excellence. The paper concludes that mobility is not an outcome in its own right and must not be treated as such (as an implicit indicator of internationalisation). To do so contributes to differential opportunity in scientific labour markets reducing both efficiency and equality.

Louise AckersEmail:

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Teaching peer-tutoring behaviors in first- and third-grade classrooms     

Leonard A. Jason  Louise Ferone  Gerald Soucy 《Psychology in the schools》1979,16(2):261-269

Peer tutoring programs represent an innovative approach for optimally utilizing resources existing within classrooms. While most tutoring programs have been aimed at helping tutees or tutors with academic difficulties, the present study involved all children in two classrooms in a peer tutoring project. A multiple baseline design indicated that prompting was effective in establishing tutoring behaviors among the children. By program end, all children were using corrective feedback, re-presenting questions, and employing contingent praise. Positive findings also were shown in academic, behavioral, and consumer satisfaction indices. In addition, 50% of children reported using peer-tutoring skills outside of the formal program.  相似文献   

Field and laboratory correlates of performance in competitive cross-country mountain bikers   总被引：1，自引：1，他引：0  

Prins L  Terblanche E  Myburgh KH 《Journal of sports sciences》2007,25(8):927-935

We designed a laboratory test with variable fixed intensities to simulate cross-country mountain biking and compared this to more commonly used laboratory tests and mountain bike performance. Eight competitive male mountain bikers participated in a cross-country race and subsequently did six performance tests: an individual outdoor time trial on the same course as the race and five laboratory tests. The laboratory tests were as follows: an incremental cycle test to fatigue to determine peak power output; a 26-min variable fixed-intensity protocol using an electronically braked ergometer followed immediately by a 1-km time trial using the cyclist's own bike on an electronically braked roller ergometer; two 52-min variable fixed-intensity protocols each followed by a 1-km time trial; and a 1-km time trial done on its own. Outdoor competition time and outdoor time trial time correlated significantly (r = 0.79, P < 0.05). Both outdoor tests correlated better with peak power output relative to body mass (both r = -0.83, P < 0.05) than absolute peak power output (outdoor competition: r = -0.65; outdoor time trial: r = -0.66; non-significant). Outdoor performance times did not correlate with the laboratory tests. We conclude that cross-country mountain biking is similar to uphill or hilly road cycling. Further research is required to design sport-specific tests to determine the remaining unexplained variance in performance.  相似文献   

The 2007 IAAF Consensus Conference on Nutrition for Athletics     

Burke L  Maughan R  Shirreffs S 《Journal of sports sciences》2007,25(Z1):S1

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Blackwell Publishers     

Louise Thrift 《Teaching Statistics》2000,22(2):34-36

This article abstracts Blackwell Publishers role asa publisher of both statistics and education andour life long goal to extend scholarlycommunication.  相似文献   

Evaluation: Beyond either-ors     

Louise L. Tyler 《Studies in Educational Evaluation》1981,7(1):17-24

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Editorial     

Kay Livingston  Louise Hayward  Steve Higgins  Dominic Wyse 《Curriculum Journal》2017,28(1):1-4

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