Athlete burnout in elite sport: A self-determination perspective

Abstract

The practice of exercise has shown to be beneficial to quality of life of individuals with HIV/AIDS. Thus, the present study analysed the effects of a combined exercise training in persons living with HIV/AIDS. Ten participants participated in the present study. The following variables were analysed: viral load and cell counts for TCD4+/TCD8; maximal oxygen consumption (VO_2max); total mass, absolute fat mass, relative fat mass, absolute lean mass, relative lean mass and body mass index; fasting glycaemia, fasting insulinaemia, homeostatic model assessment (HOMA) index (insulin resistance – homeostatic model assessment (IR-HOMA)); total cholesterol, triglycerides, high-density lipoprotein (HDL), very low-density lipoprotein (VLDL), low-density lipoprotein (LDL); superoxide dismutase, catalase, glutathione peroxidase activities; thiobarbituric acid reactive substances. The combined exercise training consisted of resistance exercises plus aerobic training (60 min · session^?1, three times per week, during 20 weeks). The number of TCD4+ cells, absolute lean mass and relative lean mass, muscle strength for the 45° leg press, seated row and triceps extension, HDL-c levels as well as VO_2max increased post-training. The activity of superoxide dismutase, catalase, glutathione peroxidase enzymes and thiobarbituric acid reactive substances levels were diminished post-training. Finally, it can be concluded that combined exercise training is able to change positively several variables related to health of individuals with HIV/AIDS, mainly the immune system as well as antioxidant mechanisms re-establishment.     

Effects of weighted sled towing on ground reaction force during the acceleration phase of sprint running

Abstract

Athletes use weighted sled towing to improve sprint ability, but little is known about its biomechanics. The purpose of this study was to investigate the effect of weighted sled towing with two different loads on ground reaction force. Ten physically active men (mean ± SD: age 27.9 ± 1.9 years; stature 1.76 ± 0.06 m; body mass 80.2 ± 9.6 kg) performed 5 m sprints under three conditions; (a) unresisted, (b) towing a sled weighing 10% of body mass (10% condition) and (c) towing a sled weighing 30% of body mass (30% condition). Ground reaction force data during the second ground contact after the start were recorded and compared across the three conditions. No significant differences between the unresisted and 10% conditions were evident, whereas the 30% condition resulted in significantly greater values for the net horizontal and propulsive impulses (P < 0.05) compared with the unresisted condition due to longer contact time and more horizontal direction of force application to the ground. It is concluded that towing a sled weighing 30% of body mass requires more horizontal force application and increases the demand for horizontal impulse production. In contrast, the use of 10% body mass has minimal impact on ground reaction force.     

UNIVERSITY STUDENTS’ VIEWS OF THE ROLE OF MATHEMATICS IN THEIR FUTURE

We report on an international study about mathematics students’ ideas of how they will use mathematics in their future study and careers. This builds on our previous research into students’ conceptions of mathematics. In this paper, we use data from two groups of students studying mathematics: those who participated in an in-depth interview and those who completed an open-ended questionnaire. We found that their responses could be grouped into four categories: don’t know; procedural skills; conceptual skills; and professional skills. Although some students held clear ideas about the role of mathematics, many were not able to articulate how it would be used in their future. This has implications for their approach to learning and our approach to teaching.     

Reforming teacher education in Tanzania

It is widely acknowledged that in order to improve the quality of education in primary schools in developing countries there is a need to place pedagogy and its training implications at the centre of teacher education reform. Like many countries in Eastern and Southern Africa, Tanzania has introduced various initiatives and reforms to improve the quality of teacher education at the pre- and in-service stages. Drawing on evidence from a baseline study of primary teacher interactional and discourse practices, and a review of teacher training colleges, this paper explores the training needs of teacher educators in Tanzania who, in the light of recent reforms to teacher education, will be responsible for education and training at the pre and in-service levels.     

Distributed leadership of school curriculum change: an integrative approach

Since its inception in 1999, the distributed leadership framework of Spillane, Halverson, and Diamond [2004. “Towards a Theory of Leadership Practice: A Distributed Perspective.” Journal of Curriculum Studies 36 (1): 3–34. doi:10.1080/0022027032000106726] has supported research into leadership and change in schools. Whilst the conceptual integrity of the framework is sound, research based upon its premises has attracted some criticism. The research has had a narrowed focus which has not generally reflected the inseparability of the elements of the framework and the situation within which leadership is enacted. In addition, it often fails to account for the complexity of critical elements of the environment such as micropolitics. This position paper proposes a reconfiguration of the distributed leadership framework as a research framework in response to this critique. The paper asserts that this new perspective that is presented is able to respond to the critique through an integrated approach that encompasses situation, social distribution and task enactment and which supports an integrated approach to research methodology. This adapted framework has the potential to more fully support research design that is actuality holistic and embedded in the context.     

Stuart Hall at the Open University

ABSTRACT

Accounts of the influence of Stuart Hall's thought on subsequent developments tend to neglect his work at the Open University. This unjustifiable neglect is illustrated by the example of his contribution to the course on Beliefs and Ideology, especially his article on 'Religious ideologies and social movements in Jamaica' [Hall, S. (1985). Religious ideologies and social movements in Jamaica. In R. Bocock & K. Thompson (Eds.), Religion and ideology (pp. 269–297). Manchester, UK: Manchester University Press].     

你可以这样说

连续几期给大家介绍的“你可以这样说”,同学们都掌握了吗？下期开始我将给大家介绍电影对白中的地道英语。     

US teachers' and school counsellors' strategies for handling school bullying incidents

A sample of 735 US teachers and school counsellors completed an online survey asking how likely they would be to use various strategies to respond to a hypothetical bullying incident. Analyses examined their use of five strategies: Ignoring the incident, Working with the bully, Working with the victim, Enlisting other adults, and Disciplining the bully. Differences in mean scores based on these strategies were found by gender of participant, the presence or absence of school anti‐bullying policies and programmes, and previous anti‐bullying training. Teachers and school counsellors differed on four of the five scale scores. Qualitative comment data add to the findings. Implications of the findings are discussed.     

The relations among young children's peer-reported trustworthiness, inhibitory control, and preschool adjustment

Sixty-five (38 male and 27 female) preschool children (mean age = 5 years 1 month) completed measures of peers’ trustworthiness (promise keeping and secret keeping). Teachers rated the preschool children's inhibitory control, trustworthiness, and preschool adjustment. Structural Equation Modeling (SEM) yielded support for the hypothesized model. The expected positive paths were found from (1) gender to preschool adjustment and inhibitory control, (2) age to peer-reported trustworthiness, (3) peer-reported trustworthiness to preschool adjustment, (4) inhibitory control to peer-reported trustworthiness, and (5) inhibitory control to preschool adjustment. The findings confirmed the hypothesized development of trustworthiness with age and girls’ advantage over boys in inhibitory control and preschool adjustment. The findings supported the hypotheses that trustworthiness is associated with preschool adjustment and mediates, in part, the relation between inhibitory control and preschool adjustment.     

Concerning the Telling of Painful Tales: The Case of Masks of the Sacred Bush

Abstract The public seems more likely to take issue with what history museums say than with what art, anthropology, and natural history museums say. In part, this is because these disciplines are understood to be challenging, not least because of the often opaque language and methods designed to impart psychic distance from their content. Exhibitions in these disciplines work by equipping and requiring us to step back before we step in, thereby making it easier to process difficult subjects. One such exhibition which was potentially emotionally charged did not provoke controversy. Did the disciplines through which the story was approached remove the story temporarily from the highly charged slave narrative and place it in a different, less contested—because more reified—context, a different kind of narrative? If so, was that a constructive contribution or a missed opportunity?