Impact sports and bone fractures among adolescents     

Kyle R. Lynch  Han C. G. Kemper  Bruna Turi-Lynch  Ricardo R. Agostinete  Igor H. Ito  Rafael Luiz-De-Marco 《Journal of sports sciences》2017,35(24):2421-2426

The objective of the present study was to investigate the effects of different sports on stress fractures among adolescents during a 9-month follow-up period. The sample was composed of 184 adolescents divided into three groups (impact sports [n = 102]; swimming [n = 35]; non-sports [n = 47]). The occurrence of stress fracture was reported by participants and coaches. As potential confounders we considered age, sex, resistance training, body composition variables and age at peak of height velocity. There were 13 adolescents who reported fractures during the 9-month period. Bone mineral density values were higher in adolescents engaged in impact sports (P-value = 0.002). Independently of confounders, the risk of stress fracture was lower in adolescents engaged in impact sports than in non-active adolescents (hazard ratio [HR] = 0.23 [95% confidence interval (CI) = 0.05 to 0.98]), while swimming practice was not associated to lower risk of fracture (HR = 0.49 [95% CI = 0.09 to 2.55]). In conclusion, the findings from this study indicate the importance of sports participation among adolescents in the reduction of stress fracture risk, especially with impact sports. More importantly, these results could be relevant for recognising adolescents in danger of not reaching their potential for peak bone mass and later an increased risk of fractures.  相似文献   

Horizontal ground reaction forces to stationary running performed in the water and on dry land at different physiological intensities     

Cristine Lima Alberton  Stephanie Santana Pinto  Gabriela Neves Nunes  Douglas Guerreiro dos Santos Rau  Paula Finatto  Amanda Haberland Antunes 《European Journal of Sport Science》2017,17(8):1013-1020

The aim of the present study was to compare the peak anterior–posterior (Fy) and medio–lateral (Fx) ground reaction forces (GRFs) of women performing stationary running at different intensities in aquatic and dry land environments. Fourteen young women performed the stationary running exercise at three cadences (first ventilatory threshold, second ventilatory threshold and maximum effort, as determined during exercise in water) in aquatic and dry land environments. Two-way repeated measures ANOVA was used to analyse the data (α?=?.05). As a result, significantly lower peak Fy anterior, Fy posterior, Fx medial and Fx lateral values were observed for the aquatic environment, except for the Fy posterior at the first ventilatory threshold. Significant differences were observed between cadences in the peak Fy anterior, Fy posterior, Fx medial and Fx lateral values, with higher values for the cadence corresponding to maximum effort compared to the first ventilatory threshold, except for the Fy posterior and Fx medial in the aquatic environment. The results indicate that the horizontal GRFs are reduced in the aquatic environment and depend on the intensity of stationary running exercise performance.  相似文献   

Learning to Love the Questions: Spirituality and the Practice of a Multicultural Teacher Educator     

Katherine Richardson Bruna 《Multicultural Perspectives》2013,15(2):103-106

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Parenting and the Adjustment of Children Born to Gay Fathers Through Surrogacy          下载免费PDF全文

Susan Golombok  Lucy Blake  Jenna Slutsky  Elizabeth Raffanello  Gabriela D. Roman  Anke Ehrhardt 《Child development》2018,89(4):1223-1233

Findings are presented on a study of 40 gay father families created through surrogacy and a comparison group of 55 lesbian mother families created through donor insemination with a child aged 3–9 years. Standardized interview, observational and questionnaire measures of stigmatization, quality of parent–child relationships, and children's adjustment were administered to parents, children, and teachers. Children in both family types showed high levels of adjustment with lower levels of children's internalizing problems reported by gay fathers. Irrespective of family type, children whose parents perceived greater stigmatization and children who experienced higher levels of negative parenting showed higher levels of parent‐reported externalizing problems. The findings contribute to theoretical understanding of the role of family structure and family processes in child adjustment.  相似文献   

Choosing the Future: Economic Preferences for Higher Education Using Discrete Choice Experiment Method     

Czajkowski  Mikołaj  Gajderowicz  Tomasz  Giergiczny  Marek  Grotkowska  Gabriela  Sztandar-Sztanderska  Urszula 《Research in higher education》2020,61(4):510-539

Research in Higher Education - This study illustrates how respondents’ stated choices (the discrete choice experiment method) combined with the random utility framework can be used to model...  相似文献   

Using online tools in participatory research with adolescents to promote civic engagement and environmental mobilization: the WaterCircle (WC) project     

Rita Ruivo Marques  Carla Malafaia  Joaquim L. Faria  Isabel Menezes 《Environmental Education Research》2020,26(7):1043-1059

Abstract

The WaterCircle (WC) project was implemented in a school, with young adolescents, to address environmental problems. Framed in a participatory research (PR) approach, this school-and-community based intervention includes the use of online tools through which environmental problems in the community are discussed within and by a group of students. Using a quasi-experimental design, with intervention and control groups, the present study involved 361 young adolescents, in grades 7 to 9, from a public school in the northern region of Portugal. Mixed methods were used for data collection and analysis, namely based on questionnaires administered in the pre- and post-test moments, as well as on students’ discourses produced in the classroom during planned activities. Statistically significant changes on self-efficacy were found for the experimental group, suggesting that the intervention program has the potential to raise young people’s empowerment regarding environmental issues. The WC program seems to foster students’ awareness of the socio-political dimensions of environmental problems, since they were able to identify different actors in the community who should be involved in the proposed solutions. Longer-term intervention is required to foster the impact of the PR on the students’ experience.  相似文献   

The Teacher's Prayer     

Gabriela Mistral 《The Educational forum》2013,77(4)

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Zweiwegintegration durch zweisprachige Bildung? Ergebnisse aus der Staatlichen Europa-Schule Berlin     

Gabriela Meier 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2012,5(1):335-352

Es gibt kein Rezept, wie mit der an Schulen in Europa h?ufig vorkommenden Sprachenvielfalt umgegangen werden sollte. Dieser Artikel pr?sentiert eine vielversprechende Alternative zum einsprachigen Unterricht. Die Staatliche Europa-Schule Berlin (SESB) ist ein Modell der Zweiwegimmersion (ZWI), das Kinder mit deutscher Muttersprache und Kinder mit einer anderen vor Ort gesprochenen Muttersprache in der gleichen Schulklasse vereint, und sie in zwei Sprachen gemeinsam unterrichtet. In diesem Modell, das in Berlin an 17 Grundschulen und 13 weiterführenden Schulen angeboten wird, lernen Kinder und Jugendliche in zwei Sprachen voneinander und miteinander. Auf der Grundlage einer haupts?chlich quantitativen, quasi-experimentellen Studie mit 603 Jugendlichen wird bewiesen, dass es eine Anzahl von friedenslinguistischen Vorteilen gibt, die neben pers?nlicher und gesellschaftlicher Mehrsprachigkeit soziale Zweiwegintegration f?rdern k?nnen. Dies führt zu dem Schluss, dass ZWI-Erziehung, so wie sie in Berlin praktiziert wird, als Bildungsmodell für andere mehrsprachige Regionen Europas dienen k?nnte.  相似文献   

Cognitive Pathways: Analysis of students' written texts for science understanding     

Bruna Irene Grimberg  Brian Hand 《International Journal of Science Education》2013,35(4):503-521

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Developing School Media Libraries for the Autonomy of Linguistic Minorities     

Maria Emilia Ricardo Marques 《Educational Media International》2013,50(3):119-123

Abstract

This article discusses the role played by socio‐educational documents, from schools or local media libraries, in the everyday life of the linguistic minority learner.  相似文献