Swimming and peak bone mineral density: A systematic review and meta-analysis     

Alejandro Gomez-Bruton  Jesús Montero-Marín  Alejandro González-Agüero  Alba Gómez-Cabello  Javier García-Campayo  Luis A. Moreno 《Journal of sports sciences》2018,36(4):365-377

This meta-analysis aims to determine the effects of regular swimming on bone mineral density (BMD) in young adults (18–30 years). A systematic search was performed in Pubmed, SPORTDiscus and the Cochrane Library from the earliest possible year to March 2016. Swimmers were compared to non-athletic controls (CG) and to high-impact athletes (HIGH). Effect sizes with the Hedges g in random effects models were developed. Fourteen studies met the inclusion criteria and were included in the meta-analyses. Swimmers presented similar BMD values to CG in whole-body (g = ?0.20; P = 0.251), femoral neck (g = ?0.05; P = 0.818) and lumbar spine (g = 0.18; P = 0.492); and lower BMD in the whole-body (g = ?1.21; P < 0.001), femoral neck (g = ?1.51; P < 0.001) and lumbar spine (g = ?0.84; P = 0.017) than the HIGH. For the whole-body differences, the higher the latitude the smaller the differences between swimmers and HIGH (B = 0.10; P = 0.001). For the femoral neck differences, age also seemed to reduce the differences between groups (B = 0.19; P = 0.020). Young adult swimmers present similar BMD values than CG and lower values than HIGH.  相似文献   

Effect of verbal instructions and image size on visual search strategies in basketball free throw shooting     

Saleh A. Al-Abood  Simon J. Bennett  Francisco Moreno Hernandez  Derek Ashford  Keith Davids 《Journal of sports sciences》2013,31(3):271-278

We assessed the effects on basketball free throw performance of two types of verbal directions with an external attentional focus. Novices ( n = 16) were pre-tested on free throw performance and assigned to two groups of similar ability ( n = 8 in each). Both groups received verbal instructions with an external focus on either movement dynamics (movement form) or movement effects (e.g. ball trajectory relative to basket). The participants also observed a skilled model performing the task on either a small or large screen monitor, to ascertain the effects of visual presentation mode on task performance. After observation of six videotaped trials, all participants were given a post-test. Visual search patterns were monitored during observation and cross-referenced with performance on the pre- and post-test. Group effects were noted for verbal instructions and image size on visual search strategies and free throw performance. The 'movement effects' group saw a significant improvement in outcome scores between the pre-test and post-test. These results supported evidence that this group spent more viewing time on information outside the body than the 'movement dynamics' group. Image size affected both groups equally with more fixations of shorter duration when viewing the small screen. The results support the benefits of instructions when observing a model with an external focus on movement effects, not dynamics.  相似文献   

Changing attitudes and intentions related to doping: An analysis of individual differences in need for cognition     

Javier Horcajo  David Santos  Joshua J. Guyer  Lorena Moreno 《Journal of sports sciences》2013,31(24):2835-2843

ABSTRACT

Research has shown that athletes’ attitudes towards the use of banned performance-enhancing substances are reliable predictors of their intentions to use these substances, which in turn can be relevant predictors of their actual doping behaviours. Despite the important role played by attitudes and intentions in doping, research analysing how to change those attitudes and intentions is relatively scarce. The present study examined how individual differences in Need for Cognition (NC, Cacioppo & Petty, 1982) influenced doping-related attitude change and subsequent behavioural intentions. Participants were randomly assigned to read a persuasive message either against or in favour of legalising the use of several banned substances, including anabolic androgenic steroids (AAS) and Erythropoietin (EPO). In addition, participants completed the NC scale, and finally reported their attitudes and behavioural intentions regarding the legalisation proposal. As hypothesised, results showed that participants who received an anti-legalisation message had significantly more unfavourable attitudes towards the proposal than participants who received a pro-legalisation message, regardless of NC. However, as predicted, NC moderated the relationship between individuals’ attitudes and their intentions. That is, high-NC participants showed greater attitude-intention correspondence than low-NC participants.  相似文献   

Determinants and patterns of physical activity practice among Spanish university students     

Dora Romaguera  Pedro Tauler  Miquel Bennasar  Jordi Pericas  Carlos Moreno  Sonia Martinez 《Journal of sports sciences》2013,31(9):989-997

Abstract

The purpose of the present study was to investigate the socio-demographic and lifestyle determinants of physical activity practice, as well as the motivations for being or not being physically active in Spanish university students. A representative sample of students from a Spanish university (n = 2,051; 42.1% males; mean age 21.9, s = 4.8 years) participated in the present cross-sectional study. A questionnaire including questions regarding lifestyle, dietary habits, parents' characteristics, and physical activity habits was administered to the students. The socio-demographic and lifestyle determinants of physical activity practice were assessed using multivariable logistic regression. 68.4% of men and 48.4% of women reported to practise physical activity in the present sample. Those who practised physical activity consumed more fruits and were less likely to be smokers compared to non-physically active students. Also, physically inactive men spent more time in front of the computer and physically inactive women spent more time in front of the TV and were more likely to be frequent alcohol consumers. Maternal educational level and maternal physical activity habits were also important determinants of physical activity practice among men and women respectively. In conclusion, physically active students tended to engage in other healthy habits in the present population, suggesting the clustering of healthy or unhealthy lifestyle factors among specific subgroups.  相似文献   

Variable training: effects on velocity and accuracy in the tennis serve     

Hector Hernández-Davo  Tomás Urbán  Jose Manuel Sarabia  Casto Juan-Recio  Francisco Javier Moreno 《Journal of sports sciences》2013,31(14):1383-1388

Abstract

Variable practice has been shown to be an effective strategy to improve open motor skills. However, the usefulness of this procedure in closed motor skills remains controversial. The following study has the objective of analysing the effects of variability practice in the improvement of a closed skill. The skill studied has been the tennis serve. Thirty young tennis players (13 ± 1.52 years), divided in two groups, took part in this study. One group practiced in variable conditions and the other group in consistency conditions. Both groups performed 12 training sessions (60 serves/session). The variable practice group improved their accuracy significantly compared with the consistency group (F_3.25 = 3.078; P = 0.035). The velocity of serve increased after training in both groups (F_3.25 = 15.890; P = 0.001). The practice in variable conditions seems to be effective in improving the performance of the tennis serve.  相似文献   

Impressions of ICOTS II     

Bob Croasdale  Jeff Evans  Jerry L. Moreno  Harry O. Posten  Andy Begg  John Bernard  Ethel C. Henderson 《Teaching Statistics》1987,9(1):2-7

The following short contributions are from people who attended the Second International Conference on Teaching Statistics held in Victoria, August 1986  相似文献   

Reseñas     

Amparo Moreno 《Infancia y Aprendizaje》2013,36(31-32):249-250

  相似文献   

Evaluation of reflective practice in teacher education     

Esther Belvis  Pilar Pineda  Carme Armengol  Victoria Moreno 《欧洲师范教育杂志》2013,36(3):279-292

Teacher education based on ‘reflective practice’ consists of observing, analysing and reflecting on teacher performance in order to improve professional practice. This article presents the results of an evaluation of a programme on mathematics teaching carried out using reflective practice. It was targeted at 284 teachers in various stages of the education system, using an approach that combines quantitative (surveys) and qualitative (interviews and reports) methods. While the study shows that the education programme generates high levels of satisfaction, pedagogical appropriateness and learning, its achievements in effectiveness are moderate. Although, in general, what is learned through teacher education is implemented in the classroom, it is done so in an isolated fashion, in other words, individually and without becoming a part of the culture of the school. The results show little evidence of its impact on student learning. The article offers proposals for improving the education programme, while, at the same time, analysing the usefulness of the approach and evaluation tools employed.  相似文献   

Guidance and counseling in Catalonia (Spain)     

Luisa R. Moreno 《International journal for the advancement of counseling》1984,7(1):31-40

The author of this article attempts to set out the efforts that have been made in Catalonia (autonomous nationality within Spain) to regulate rationally the guidance and counseling services of fered to that part of the student population that has the greatest needs. She describes some models of services that have been created under the auspices of different institutions and analyzes their functions. Finally she draws a series of critical conclusions.University of Barcelona  相似文献   

Hidden connections: Network effects on editorial decisions in four computer science journals     

Giangiacomo Bravo  Mike Farjam  Francisco Grimaldo Moreno  Aliaksandr Birukou  Flaminio Squazzoni 《Journal of Informetrics》2018,12(1):101-112

This paper aims to examine the influence of authors’ reputation on editorial bias in scholarly journals. By looking at eight years of editorial decisions in four computer science journals, including 7179 observations on 2913 submissions, we reconstructed author/referee-submission networks. For each submission, we looked at reviewer scores and estimated the reputation of submission authors by means of their network degree. By training a Bayesian network, we estimated the potential effect of scientist reputation on editorial decisions. Results showed that more reputed authors were less likely to be rejected by editors when they submitted papers receiving negative reviews. Although these four journals were comparable for scope and areas, we found certain journal specificities in their editorial process. Our findings suggest ways to examine the editorial process in relatively similar journals without recurring to in-depth individual data, which are rarely available from scholarly journals.  相似文献