The aim of this cross-sectional study was to compare bone mass in young female athletes playing ball games on different types of playing surfaces. About 120 girls, 9–13 years of age (10.6 ± 1.5 years old Tanner I–III) were recruited and divided into prepubertal and pubertal groups. The sample represented 3 groups of athletes: soccer (N = 40), basketball (N = 40), and handball (N = 40); and 6 different playing surfaces (soccer – ground, soccer – artificial turf, basketball – synthetic, basketball – parquet, handball – synthetic, and handball – smooth concrete). Total and regional body composition (bone mass, fat mass, and lean mass) were measured by dual-energy X-ray absorptiometry (DXA). The mechanical properties of the surfaces (force reduction, vertical deformation, and energy return) were measured with the Advanced Artificial Athlete (Triple A) method. The degree of sexual development was determined using Tanner test. The pubertal group showed that soccer players on the ground, basketball players on synthetic, and handball players on smooth concrete had higher values of bone mineral content (BMC) and bone mineral density (BMD) (P < 0.05) than the soccer players on the artificial turf, basketball players on parquet, and handball players on synthetic. In conclusion, a hard playing surface, with less vertical deformation and force reduction, and greater energy return, is associated with higher levels of BMD and BMC in growing girls, regardless of the sport they practice. 相似文献
We have received numerous requests to present in “Higher Education in Europe”, in relatively short form, the main features of higher education systems in the different countries of the Unesco European Region.
As partial response to these requests, we present below a survey on the Swiss system of higher education, written for “Higher Education in Europe” by Dr. Esther C. Garke from the Swiss Federal Office for Education and Science, and CEPES Liaison Officer in Switzerland.
We also take this opportunity to invite our readers to provide us with papers or documents for similar presentations. 相似文献
This study shows that professional identity should not be viewed as a composed variable with a uniform structure. Based on the literature and previous research, we view teachers’ job satisfaction, self‐efficacy, occupational commitment and change in the level of motivation as indicators of teachers’ professional identity. Using two‐step cluster analysis, three distinct professional identity profiles have empirically been identified, based on data of 1214 teachers working in secondary education in the Netherlands. These profiles differed significantly regarding the indicators of teachers’ professional identity. Teachers belonging to the found profiles did not significantly differ in their amount of experience. 相似文献
Research indicates that early childhood professionals gather assessment information to monitor child development and learning, to guide curriculum planning and decision making, to identify children who may have special needs, to report and communicate with others, and to evaluate programmes. A review of literature indicates that immigrant children have low achievement assessment scores as compared with mainstream American children, also immigrant children enter kindergarten already behind their mainstream American peers. The current study explored early childhood teachers' perceptions of assessment measures used with immigrant children and the challenges faced when assessing immigrant children. Findings of the study reveal that there are several factors that make early childhood teachers fail to gather effective assessment information from immigrant children. Unless the factors are addressed, planning for effective curriculum for immigrant children using assessment data will continue to be a challenge for early childhood teachers. Factors that continue to affect gathering effective assessment data from immigrant children include language barriers, cultural clashes, socio‐economic factors, and culturally and linguistically biased assessment measures. 相似文献
Using statistical analyses, the following article describes the present situation of women in Swiss higher education, the difficulties met by women to succeed in universities as well as in the job‐market where employment conditions are not always satisfactory. The reader might also refer to the article of Mrs. Wiederkehr‐Benz where a different aspect of the problem is presented.
Mrs. Esther Garke is attached to the Swiss Federal Office for Education and Science, Bern and she is also the liaison officer for CEPES in Switzerland. 相似文献