Effects of regular training at the same time of day on diurnal fluctuations in muscular performance     

Souissi N  Gauthier A  Sesboüé B  Larue J  Davenne D 《Journal of sports sciences》2002,20(11):929-937

The aim of this study was to determine whether there is an effect of time of day on the adaptation to strength training at maximal effort. Fourteen participants took part in this experiment. Their peak anaerobic power (Wingate anaerobic test) and peak knee extension torque at six angular velocities (1.05, 2.10, 3.14, 4.19, 5.24 and 6.29 rad x s(-1)) were recorded in the morning (between 07:00 and 08:00 h) and in the evening (between 17:00 and 18:00 h) just before and 2 weeks after a 6 week course of regular training. Seven of them trained only in the morning and seven only in the evening. Multivariate analysis of variance revealed a significant group x pre-/post-training x time of day interaction effect for peak torque and peak anaerobic power. Before training, in both groups, peak torque and peak anaerobic power were significantly higher in the evening than in the morning. After training, there was no significant difference in peak torque and peak anaerobic power between the morning and the evening for the morning training group. In contrast, in the evening training group, peak torque and peak anaerobic power were higher in the evening than in the morning. As a result of training, both peak torque and peak anaerobic power increased from their initial values as expected. The morning training group improved their peak anaerobic power significantly in the morning and in the evening, the absolute increase being larger in the morning than in the evening. The evening training group did not improve their peak anaerobic power in the morning, whereas it improved significantly in the evening. Although peak torque was significantly improved by training in the morning and evening in both groups, the absolute increase was greater in the morning than in the evening in the morning training group, whereas the opposite was the case for the evening training group. These results suggest that training twice a week at a specific hour increases the peak torque and the peak anaerobic power specifically at this hour and demonstrates that there is a temporal specificity to strength training.  相似文献   

Corroding the Curriculum: Sustainability v. Education     

Austin Williams 《Academic Questions》2010,23(1):70-83

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Determining optimal trial size using sequential analysis     

Paul Geoffrey Taylor  Kwee-Yum Lee  Raul Landeo  Damien Michael O'Meara  Emma Millett 《Journal of sports sciences》2015,33(3):300-308

When characterising typical human movement profiles, the optimal number of trials analysed for each participant should ensure a stable mean. Sequential analysis is one method able to establish the number of trials to stability by assessing a moving point mean against a set bandwidth. As the total trial number determining this bandwidth is selected arbitrarily, the effect of applying different total trial numbers on the results of sequential analysis was investigated. Twenty participants performed 30 trials of overarm throwing, and sequential analyses were applied to three dimensional (3-D) kinematic data over 10, 20 and 30 trial numbers. We found a total of 20 to be the preferred trial number for sequential analyses. Erroneous results were produced consistently by 10 trial number groups, while moving point means were statistically unchanged after the 10th trial. Subsequently, sequential analyses were applied to 20 trials to establish trials to stability in discrete and time series elements of the 3-D kinematic data. The results suggest that a trial size between 13 and 17 provides stable means for overarm throwing kinematics.  相似文献   

Detection of monoclonal protein by capillary zone electrophoresis can be challenged by iodinated contrast agent interference: a case report     

Clment Capaldo  Mourad Cheddad El Aouni  Damien Laurelli  Cyril Leven  Jean-Luc Carr 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(2)

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Managing serious teacher misbehaviour     

Damien Page 《School Leadership & Management》2014,34(3):269-283

This article presents findings from a study of five head teachers who were responsible for the management of serious teacher misbehaviour (TMB) in England. In cases that included the downloading of extreme pornography on a school laptop and a sexual relationship with a pupil, the multiple impacts of TMB were potentially devastating to the well-being of pupils, staff and the reputation of the schools. The article highlights a number of strategies for managing serious TMB considered best practice by the head teachers as well as discussing other, more nuanced issues that accompany such cases including trust relations, the influence of gender and the difficulty of simultaneous immersion and detachment required of head teachers to effectively manage such cases.  相似文献   

Repeated high-intensity exercise in professional rugby union   总被引：1，自引：1，他引：0  

Austin D  Gabbett T  Jenkins D 《Journal of sports sciences》2011,29(10):1105-1112

The aim of the present study was to describe the frequency, duration, and nature of repeated high-intensity exercise in Super 14 rugby union. Time-motion analysis was used during seven competition matches over the 2008 and 2009 Super 14 seasons; five players from each of four positional groups (front row forwards, back row forwards, inside backs, and outside backs) were assessed (20 players in total). A repeated high-intensity exercise bout was considered to involve three or more sprints, and/or tackles and/or scrum/ruck/maul activities within 21 s during the same passage of play. The range of repeated high-intensity exercise bouts for each group in a match was as follows: 11-18 for front row forwards, 11-21 for back row forwards, 13-18 for inside backs, and 2-11 for outside backs. The durations of the most intense repeated high-intensity exercise bouts for each position ranged from 53 s to 165 s and the minimum recovery periods between repeated high-intensity exercise bouts ranged from 25 s for the back row forwards to 64 s for the front row forwards. The present results show that repeated high-intensity exercise bouts vary in duration and activities relative to position but all players in a game will average at least 10 changes in activity in the most demanding bouts and complete at least one tackle and two sprints. The most intense periods of activity are likely to last as long as 120 s and as little as 25 s recovery may separate consecutive repeated high-intensity exercise bouts. The present findings can be used by coaches to prepare their players for the most demanding passages of play likely to be experienced in elite rugby union.  相似文献   

Teachers’ Role in Students’ Learning at a Project-Based STEM High School: Implications for Teacher Education     

Morrison  Judith  Frost  Janet  Gotch  Chad  McDuffie  Amy Roth  Austin  Bruce  French  Brian 《International Journal of Science and Mathematics Education》2021,19(6):1103-1123

International Journal of Science and Mathematics Education - This study explored how teachers engage and support students at a project-based STEM high school to identify key elements defining...  相似文献   

The return of the grand metanarratives of progress     

Raymond Aaron Younis  Damien Broderick  Kim Humphery 《Metascience》1997,6(1):49-62

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Causality: an empirically informed plea for pluralism     

Austin  Christopher J. 《Metascience》2016,25(2):293-296

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The Professional Development of Teacher Educators in the Developing World: a consideration of recent developments in Papua New Guinea     

Thomas A. O'Donoghue  David Austin 《Asia-Pacific Journal of Teacher Education》1995,23(1):45-59

This paper addresses the matter of the extent to which efforts aimed at the professional development activities of community (primary) school teacher educators in one developing country, namely, Papua New Guinea (PNG), correspond to the subjects’ own perceived professional needs. The general background is outlined first. Then the results of a study of a group of Papua‐New‐Guinea‐teacher‐educators’ perceptions of their professional needs, as accessed through semi‐structured interviews are presented in order to gain a preliminary indication of the appropriateness of recent developments aimed at the professional‐isation of teacher education in the country and to suggest some further developments which could be set in train. Finally, the importance of establishing a national association of teacher education is highlighted.  相似文献