Energy expenditure and dietary intake in professional football players in the Dutch Premier League: Implications for nutritional counselling     

Naomi Y.J. Brinkmans  Nick Iedema  Guy Plasqui  Loek Wouters  Wim H.M. Saris  Luc J.C. van Loon 《Journal of sports sciences》2013,31(24):2759-2767

ABSTRACT

Selecting effective dietary strategies for professional football players requires comprehensive information on their energy expenditure (EE) and dietary intake. This observational study aimed to assess EE and dietary intake over a 14-day period in a representative group (n = 41) of professional football players playing in the Dutch Premier League (Eredivisie). Daily EE, as assessed by doubly labelled water, was 13.8 ± 1.5 MJ/day, representing a physical activity level (PAL) of 1.75 ± 0.13. Weighted mean energy intake (EI), as assessed by three face-to-face 24-h recalls, was 11.1 ± 2.9 MJ/day, indicating 18 ± 15% underreporting of EI. Daily EI was higher on match days (13.1 ± 4.1 MJ) compared with training (11.1 ± 3.4 MJ; P < 0.01) and rest days (10.5 ± 3.1 MJ; P < 0.001). Daily carbohydrate intake was significantly higher during match days (5.1 ± 1.7 g/kg body mass (BM)) compared with training (3.9 ± 1.5 g/kg BM; P < 0.001) and rest days (3.7 ± 1.4 g/kg BM; P < 0.001). Weighted mean protein intake was 1.7 ± 0.5 g/kg BM. Daytime distribution of protein intake was skewed, with lowest intakes at breakfast and highest at dinner. In conclusion, daily EE and PAL of professional football players are modest. Daily carbohydrate intake should be increased to maximize performance and recovery. Daily protein intake seems more than adequate, but could be distributed more evenly throughout the day.  相似文献   

Choosing a major in higher education: Profiles of students’ decision-making process     

Veerle Germeijs  Koen Luyckx  Guy Notelaers  Luc Goossens  Karine Verschueren 《Contemporary educational psychology》2012

This study identified decision-making profiles of students who make a choice of a major in higher education. These profiles were examined in a sample of Belgian students at the end of Grade 12, when the educational system expects that these adolescents choose a specific major. Using latent class cluster analysis on adolescents’ scores for coping with career decisional tasks (i.e., orientation, exploration, decisional status, and commitment), four clusters were identified. As expected, these profiles paralleled Marcia’s (1966) identity statuses (i.e., the achievement, moratorium, foreclosure, and diffusion status). Results provided support for the external validity of the identified clusters through differential associations with several person variables (i.e., career decision-making self-efficacy, career choice anxiety, and decision-making style) and with academic functioning in higher education (i.e., commitment, academic and social adjustment). Implications for current educational research and research on career decision-making are discussed.  相似文献   

The differential impact of observational learning and practice-based learning on the development of oral presentation skills in higher education     

Luc De Grez  Martin Valcke  Irene Roozen 《高等教育研究与发展》2014,33(2):256-271

The present study focuses on the design and evaluation of an innovative instructional approach to developing oral presentation skills. The intervention builds on the observational learning theoretical perspective. This perspective is contrasted with the traditional training and practice approach. Two sequencing approaches – learners starting with observational learning versus learners starting with practice opportunities only – were compared. It was hypothesised that learners starting with observational learning would outperform learners in the practice only condition. The results suggest a significant differential impact on development of oral presentation skills. This impact of the observational learning training approach is only found in a limited number of evaluation criteria. Results additionally suggest that students are highly motivated to learn this type of skill. Interaction effects between student characteristics and instructional interventions were not significant.  相似文献   

‘I’ as Maxime ‐ Some Thoughts on the Pedagogical and Therapeutic Use of Audio‐Visual Media     

Luc Bastide 《Educational Media International》2013,50(2):58-66

Abstract

It is not a new idea to use audio‐visual media towards therapeutic ends. This paper, acknowledging Aristotle's theory on the purgative virtues of art, also traces contemporary theorists vis‐a‐vis research conducted between 1926 and 1971. Having done so, the author relates this research, through the use of a case study, to the use of alternative audio‐visual materials as applied in the therapeutic sense. It is concluded that the use of audio‐visual materials and methods can offer great potential to the therapist willing to include them in treating patients.  相似文献   

Can public arts education replace arts subsidization?     

Luc Champarnaud  Victor Ginsburgh  Philippe Michel 《Journal of Cultural Economics》2008,32(2):109-126

The debate about whether the arts should be supported or not is far from new, and most governments support the arts in one way or the other. The literature considers several arguments in favor of such interventions. Public education may seem to be an action which could, in the long run, lead to possible reductions of subsidies. Surveys show that those who have been exposed to the arts when young participate more when adult. However, the “non-market” transmission from parents to children generates an external effect, which has to be taken into account to reach first-best situations. We construct an overlapping generations model in which young consumers are exposed to both public education toward the arts and to non-altruistic transmission of such a taste from their parents. We show that the first-best can be reached only if there is both public cultural education and subsidization of arts consumption. Therefore, education cannot be considered as a substitute for subsidies to arts consumption. However, as is often the case in European countries, government intervention is usually below the first-best level. Using a model calibrated on French data, we show that it is then preferable to subsidize education, while consumption, especially of the older generations, should be taxed rather than subsidized.

Luc ChamparnaudEmail:

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How Long Does it Take to Earn a Higher Education Degree in Spain?     

G��rard Lassibille  Ma Luc��a Navarro G��mez 《Research in higher education》2011,52(1):63-80

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Localized removal of layers of metal,polymer, or biomaterial by ultrasound cavitation bubbles     

David Fernandez Rivas  Bram Verhaagen  James R. T. Seddon  Aaldert G. Zijlstra  Lei-Meng Jiang  Luc W. M. van der Sluis  Michel Versluis  Detlef Lohse  Han J. G. E. Gardeniers 《Biomicrofluidics》2012,6(3)

We present an ultrasonic device with the ability to locally remove deposited layers from a glass slide in a controlled and rapid manner. The cleaning takes place as the result of cavitating bubbles near the deposited layers and not due to acoustic streaming. The bubbles are ejected from air-filled cavities micromachined in a silicon surface, which, when vibrated ultrasonically at a frequency of 200 kHz, generate a stream of bubbles that travel to the layer deposited on an opposing glass slide. Depending on the pressure amplitude, the bubble clouds ejected from the micropits attain different shapes as a result of complex bubble interaction forces, leading to distinct shapes of the cleaned areas. We have determined the removal rates for several inorganic and organic materials and obtained an improved efficiency in cleaning when compared to conventional cleaning equipment. We also provide values of the force the bubbles are able to exert on an atomic force microscope tip.  相似文献   

Structure of expert players' activity during competitive interaction in table tennis     

Sève C  Saury J  Ria L  Durand M 《Research quarterly for exercise and sport》2003,74(1):71-83

This study analyzed the activity of expert table tennis players during a match, in reference to course of action theory (Theureau, 1992). Matches were videotaped, and the players' verbalizations as they viewed the tapes were collected a posteriori. The data was analyzed by (a) transcribing the players' actions and verbalizations, (b) decomposing their activity into elementary units of meaning, and (c) grouping the elementary units into larger sets. The results showed that the matches began with an inquiry into the specific features of the opponent's play. This was followed by reproducing the actions identified as effective during the inquiry. The results are discussed in relation to the role of training in expert performance.  相似文献   

Determinants of Sleep Duration Among High School Students in Part‐Time Employment     

Luc Laberge  Élise Ledoux  Julie Auclair  Marco Gaudreault 《Mind, Brain, and Education》2014,8(4):220-226

Adolescents who work while attending school are reported to sleep less than those who do not. This study aimed to identify factors associated with short sleep duration in students who work during the school year. A cross‐sectional survey aiming to describe working conditions and occupational safety and health was completed by representative samples of Quebec high school students aged 12–19 years from three administrative regions (n = 3,871). A multiple stepwise regression analysis was performed with sleep duration as the dependent variable, and sociodemographic, school, occupational, and health factors as potential explanatory variables. Significant factors associated with shorter sleep duration were later bedtimes (p < .001), shorter weekend oversleep (p < .001), higher physical work factors related to handling efforts (p < .001), and female gender (p < .01). Addressing work conditions of student workers may help prevent sleep deprivation. Special efforts should also target girls combining work and study.  相似文献   

Recommendations for the application and follow-up of quality controls in medical laboratories     

Jean-Marc Giannoli  Stphanie Albarede  Thierry Avellan  Jean-Pierre Bouilloux  Rgine Cartier  Richard Cohen  Nathalie Colard  Luc Essemilaire  Jean-Louis Galinier  Mathieu Kuentz  Mickaël Paris  Henri Portugal  Florian Scherrer  Jean-Pascal Siest  Anne Vassault  Jean-Michel Vialle 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(2)

This is a translation of the paper “Recommendations for the application and follow-up of quality controls in medical biology laboratories” published in French in the journal Annales de Biologie Clinique (Recommandations pour la mise en place et le suivi des contrôles de qualité dans les laboratoires de biologie médicale. Ann Biol Clin (Paris). 2019;77:577-97.). The recommendations proposed in this document are the result of work conducted jointly by the Network of Accredited Medical Laboratories (LABAC), the French Society of Medical Biology (SFBC) and the Federation of Associations for External Quality Assessment (FAEEQ). The different steps of the implementation of quality controls, based on a risk analysis, are described. The changes of reagent or internal quality control (IQC) materials batches, the action to be taken in case of non-conform IQC results, the choice of external quality assessment (EQA) scheme and interpretation of their results as well as the new issue of analyses performed on several automatic systems available in the same laboratory are discussed. Finally, the concept of measurement uncertainty, the robustness of the methods as well as the specificities of near-patient testing and rapid tests are described. These recommendations cannot apply for all cases we can find in medical laboratories. The implementation of an objective alternative strategy, supported with documented evidence, might be equally considered.  相似文献