Physical activity levels of 5-11-year-old children in England as determined by continuous observation.     

M Sleap  P Warburton 《Research quarterly for exercise and sport》1992,63(3):238-245

Continuous observation of the physical activity of 56 preadolescent children was conducted in four regions of England from October 1988 to July 1989. Observations were undertaken during school break times, lunch times, and physical education lessons, as well as during the children's free time. Of total time observed, the children spent 32.4% of it engaged in moderate to vigorous physical activity (MVPA). Children were shown to be most active during school breaks and least active during free time at home. However, it is thought that cardiorespiratory benefits are best achieved by participation in sustained periods of MVPA. Only 8 (14%) of the 56 children were observed to participate in MVPA for sustained periods of 20 min or longer. A random sample of 55 physical education lessons was observed. Only 6 children engaged in MVPA for sustained periods of 5 min or more, and no children participated in MVPA for 10 min or longer. The implications of these results are that, although the children engaged in a reasonable amount of MVPA, it may not have been sustained for periods of sufficient length to produce a cardiovascular training response. Consideration is given to ways of promoting lifelong involvement in physical activity.  相似文献   

Problems faced by a writer in communicating research findings in child development     

VAN DE WATER M 《Child development》1948,19(1-2):67-75

  相似文献   

Barriers to older people’s participation in local governance: The impact of diversity     

A. M. Petriwskyj  R. Serrat  J. Warburton  J. Everingham  M. Cuthill 《Educational gerontology》2017,43(5):259-275

Creating opportunities for inclusive participation by older people in local governance is made more complex by their diversity, which can shape who participates, in what ways, and how effectively. The existing research, however, largely focuses on the impact of socio-demographic characteristics or of individual barriers on participation, without considering how interactions between these may shape pathways to participation among older people. This quantitative study explored the relationships between participation by older people, barriers to participation, and socio-demographic characteristics. The results indicate that socio-demographic diversity impacts on the importance attributed to barriers as well as the strength and direction of their relationships with participation. The findings problematize the dominant approaches to understanding barriers to and patterns in participation. A more sophisticated understanding of inclusive governance in ageing communities needs to consider the iterative and interactional nature of pathways to participation in the context of the complexity of the “older population.”  相似文献   

论西藏地区图书馆藏学文献信息服务   总被引：4，自引：0，他引：4  

德萨 《图书馆论坛》2005,25(4):160-162,80

分析了目前西藏地区图书馆发展藏学文献信息服务的优势、现状和存在的问题，提出了深化西藏地区图书馆藏学信息服务的对策。  相似文献   

Words and Life     

RAFFAELLA DE ROSA 《Philosophical Books》1995,36(4):267-270

  相似文献   

SHADES OF REALISM     

MAX DE GAYNESFORD 《Philosophical Books》1995,36(1):1-9

  相似文献   

When should we submit our papers? Reply to Hartley     

Shaul SHALVI  Matthijs BAAS  Michel J.J. HANDGRAAF  Carsten K.W. DE DREU 《Learned Publishing》2011,24(1):33-34

  相似文献   

“藏汉双语”教师专业发展若干问题研究     

王发斌  赵富学  道周  德合拉 《湖北第二师范学院学报》2014,(9)

“藏汉双语”教师的专业发展对于提高广大藏区基础教育质量意义重大。研究从影响“藏汉双语”教师专业发展的问题入手,对“藏汉双语”教师的教学认知能力、人际交往倾向、职业发展动机、自我评价等方面进行系统分析,探索“藏汉双语”教师专业发展的环境调控和优化的策略。  相似文献   

The effects of exercise in hypoxic and normoxic conditions on endothelin-1 and arterial compliance     

Giles LV  Warburton DE  Esch BT  Fedoruk MN  Rupert JL  Taunton JE 《Journal of sports sciences》2012,30(3):261-267

The purpose of this study was to determine the effects of short-term normoxic and hypoxic exercise on plasma endothelin-1 and nitric oxide levels, and the relationship of arterial compliance and pulmonary artery pressure to endothelin-1. Seven endurance-trained males completed two incremental and two steady-state exercise tests performed at ventilatory threshold in normoxia and hypoxia (fraction of inspired oxygen = 0.14). Plasma endothelin-1was measured throughout steady-state tests. Arterial compliance using applanation tonometry, plasma nitric oxide and pulmonary artery pressure using Doppler echocardiography were measured before and after exercise. Small arterial compliance and pulmonary artery pressure significantly increased following exercise. There were no main effects of condition or time for plasma endothelin-1and nitric oxide levels. There were no significant relationships between plasma endothelin-1 and arterial compliance or pulmonary artery pressure. In conclusion, mechanisms other than the endothelial system may play a role in the exercise-induced changes in small artery compliance in this study population. Moderate hypoxia and a 30-minute steady-state exercise have limited effects on plasma endothelin-1 in endurance-trained males.  相似文献   

Write when hot — submit when not: seasonal bias in peer review or acceptance?     

Shaul SHALVI  Matthijs BAAS  Michel J. J. HANDGRAAF  Carsten K.W. DE DREU 《Learned Publishing》2010,23(2):117-123

At a top psychology journal, Psychological Science (PS), submissions peak during the summer months. We tested whether this seasonal submission bias decreases the likelihood of a paper being accepted in that period. Month of submission data was obtained for all 575 publications in PS for the period 2003–2006. Whereas submissions to PS were higher in the summer, there was no evidence that most accepted publications were originally submitted in the summer. Thus, contributors submit to PS when the likelihood of acceptance is the lowest – creating their own entrance barrier. A similar seasonal pattern was not identified for Personality and Social Psychology Bulletin, another top psychology journal. Using the Web of Knowledge database, we further assessed whether overcoming the seasonal entrance barrier influences the number of citations a paper receives in subsequent years. We discuss the possibility that the different rejections policies in the two journals, employing desk rejections or not, may explain this discrepancy, and explore a range of alternative hypotheses.  相似文献