Extra-curricular participation in sports and socio-demographic factors in Spanish adolescents: the AVENA study     

Gracia-Marco L  Tomas C  Vicente-Rodriguez G  Jimenez-Pavon D  Rey-Lopez JP  Ortega FB  Lanza-Saiz R  Moreno LA 《Journal of sports sciences》2010,28(13):1383-1389

The aims of this study were to identify differences between the sexes in extra-curricular participation in sports and to determine its association with body fat and socio-demographic factors in Spanish adolescents. A total of 2165 adolescents (1124 males and 1041 females) aged 13.0-18.5 years from the AVENA Study participated. Participants filled in an ad hoc questionnaire for extra-curricular participation in sports, which was the dependent variable. Independent variables were: age, percent body fat, and father's and mother's educational level and occupation. Chi-square tests and logistic regression were applied. Bivariate analysis showed for male adolescents that age and father's occupation were related to extra-curricular participation in sports. In addition, body fat and mother's education and occupation (all P?相似文献   

Gaia Theory in Brazilian High School Biology Textbooks     

Ricardo Santos Do Carmo  Nei Freitas Nunes-Neto  Charbel Niño El-Hani 《Science & Education》2009,18(3-4):469-501

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Teachers' Attitudes Toward Technology in a Two-Way Dual-Language Program     

Ricardo González-Carriedo  Pamela Esprívalo Harrell 《学校用计算机》2018,35(2):111-133

This study examined the attitudes of nine teachers in a two-way dual-language program in regard to using technology to support the linguistic and academic development of emergent bilinguals. Using a phenomenological, multiple case-study approach, teachers' perceptions about using technology in education and the potential of technology to advance the students' bilingualism and biliteracy were analyzed. Results showed that teachers had a positive outlook about the potential of technology as a tool to support the academic and linguistic growth of the students. However, several significant challenges were identified, most notably among them the scarcity of technological hardware at the school and the shortage of Spanish-language educational resources. The teachers' perception was that a greater availability of digital technologies, including resources in the Spanish language, would greatly enhance student learning.  相似文献   

Effects of inspiratory muscle training in professional women football players: a randomized sham-controlled trial     

Bruno Archiza  Daniela Kuguimoto Andaku  Flávia Cristina Rossi Caruso  José Carlos Bonjorno Jr.  Cláudio Ricardo de Oliveira  Paula Angélica Ricci 《Journal of sports sciences》2018,36(7):771-780

This study was conducted to determine the effects of inspiratory muscle training (IMT) on respiratory and peripheral muscles oxygenation during a maximal exercise tolerance test and on repeated-sprint ability (RSA) performance in professional women football players. Eighteen athletes were randomly assigned to one of the following groups: SHAM (n = 8) or IMT (n = 10). After a maximal incremental exercise test, all participants performed (on a different day) a time-to-exhaustion (Tlim) test. Peripheral and respiratory muscles oxygenation by near-infrared spectroscopy, breath-by-breath ventilatory and metabolic variables, and blood lactate concentration were measured. The RSA test was performed on a grass field. After a 6 week intervention, all athletes were reevaluated. Both groups showed increases in inspiratory muscles strength, exercise tolerance and RSA performance, however only the IMT group presented lower deoxyhemoglobin and total hemoglobin blood concentrations on intercostal muscles concomitantly to an increased oxyhemoglobin and total hemoglobin blood concentrations on vastus lateralis muscle during Tlim. In conclusion, these results may indicate the potential role of IMT to attenuate inspiratory muscles metaboreflex and consequently improve oxygen and blood supply to limb muscles during high-intensity exercise, with a potential impact on inspiratory muscle strength, exercise tolerance and sprints performance in professional women football players.  相似文献   

The influence of pitch dimensions on performance during small-sided and conditioned soccer games     

Luís Vilar  Ricardo Duarte  Pedro Silva  Jia Yi Chow  Keith Davids 《Journal of sports sciences》2013,31(19):1751-1759

Abstract

This study examined the influence of pitch dimensions in small-sided soccer games in shaping opportunities for performers to maintain ball possession, pass to teammates and shoot at goal. Fifteen amateur standard male participants (M = 21.87, σ = 1.96 years) played 5 v 5 small-sided soccer games in three varying pitch conditions (28 m × 14 m, 40 m × 20 m and 52 m × 26 m). Thirty sequences of play in each condition were selected for digitisation using TACTO software, allowing the capture of bi-dimensional displacement coordinate data of all players and the ball. The values of interpersonal distance between all attackers and immediate defenders and the relative distances of defenders to intercept a shot and a pass were computed as dependent variables. Results showed existence of fewer opportunities to maintain ball possession on smaller pitches, compared to medium and larger pitches. Conversely, the different dimensions set to the pitch did not influence opportunities for players to shoot at goal, or to perform passes to other teammates. By examining the specific spatial–temporal relationships of players and key-task constraints, the data from this study explain how effects of manipulating pitch dimensions of small-sided games might enhance opportunities for acquiring specific movement and decision-making skills.  相似文献   

Participation in sports in childhood and adolescence and physical activity in adulthood: A systematic review     

Mariana Biagi Batista  Catiana Leila Possamai Romanzini  Cynthia Correa Lopes Barbosa  Gabriela Blasquez Shigaki  Marcelo Romanzini  Enio Ricardo Vaz Ronque 《Journal of sports sciences》2013,31(19):2253-2262

ABSTRACT

The aim of this study was to systematically review the literature to verify the association between participation in sports (PS) in childhood and adolescence and physical activity (PA) in adulthood. A systematic search was conducted in the following databases: Medline (PUBMED), Web of Science, Scopus, and SPORTDiscus, LILACS and SciELO. All steps of the process followed the recommendations of the PRISMA FlowDiagram. After all the steps of the process, 29 articles were included for analysis. In general, only three of the studies analyzed found no relation between PS in childhood and adolescence and PA in adulthood. However, a positive relationship was found to be weak in only 7% of the studies, a moderate relation in 62% of the studies, and a strong relation in 21%. It was found that higher weekly frequencies of PS; persistence of at least three years of PS and, finally, the highest level of practice and/or competition reached were related to higher levels of PA in adulthood. Thus, it can be concluded that there is a positive association considered moderate to strong between PS in childhood and adolescence and PA in adulthood.  相似文献   

The Physics Laboratory – A Historical Overview and Future Perspectives     

Trumper  Ricardo 《Science & Education》2003,12(7):645-670

In the framework of teaching the natural sciences, ``laboratory' is a general name for activities based on observations, tests, and experiments done by students. It is hard to imagine learning to do science, or learning about science, without doing laboratory or fieldwork. In this paper, a historical overview of the place, purposes, and goals of the laboratory in physics teaching is presented, together with perspectives for its future related to the most recent results of research in physics education, mainly those concerning the constructivist and social constructivist learning approaches. Based on these approaches we try to validate the belief that microcomputer-based laboratories (MBLs) are one of the most promising perspectives in physics laboratory teaching, based on both theoretical and empirical grounds.  相似文献   

Impact of a computer-based intervention in Chilean children at risk of manifesting reading difficulties / Impacto de una intervención basada en ordenador en niños chilenos con riesgo de manifestar dificultades lectoras     

Ricardo Rosas  María-Paz Ramírez  Alejandra Meneses  Alejandra Guajardo 《Infancia y Aprendizaje》2017,40(1):158-188

Reading difficulties have reached a prevalence of 3–10% in school-age children. Those who present these difficulties avoid reading and benefit very little from school-based learning opportunities, resulting in maladjustments, dropping out of school and having to repeat grades. Presented here are the results of an intervention based on a computer game intended for explicit phonic training in first-grade school children at risk of possessing reading difficulties. Fifty-six children from a low socioeconomic status (SES) and 31 children from a high socioeconomic status, divided into two groups (control and experimental), participated in the study. After the intervention, participants from the low-SES experimental group had enhanced their skills regarding letter sound recognition, whereas the high-SES experimental group had improved their naming speed. The results are discussed in light of the impact of interventions based on computer games and of the importance of the development of sublexical skills in children at risk of manifesting reading difficulties in transparent orthographies.  相似文献   

Stairway to employment? Internships in higher education     

Patrícia Silva  Betina Lopes  Marco Costa  Dina Seabra  Ana I. Melo  Elisabeth Brito  Gonçalo Paiva Dias 《Higher Education》2016,72(6):703-721

This article aims to shed light on the current debate regarding the role of internships in higher education in graduates’ employability. In specific, it analyses empirical data on a large-scale study of Portuguese first-cycle study programmes, in order to explore indicators of the professional value of internships in the employability of higher education graduates. Results demonstrate that study programmes that include internships tend to significantly enhance graduates’ employability, particularly within the universe of polytechnic and public higher education institutions. Besides the instrumental value of internships, the impact of the nature and structure of the internship on the percentage of unemployed graduates are also discussed. Mandatory internships and the inclusion of multiple, shorter internships throughout the degree are negatively associated with unemployment levels. Results indicate work-based learning can be used as a successful strategy to bridge theoretical knowledge and practice and enhance graduate employability. These findings provide important insights for the evaluation and/or the design of internship programmes in higher education.  相似文献   

A Microcomputer-Based Contribution to Scientific and Technological Literacy     

Trumper  Ricardo  Gelbman  Moshe 《Journal of Science Education and Technology》2001,10(3):213-221

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