The ABC of Physical Activity for Health: A consensus statement from the British Association of Sport and Exercise Sciences     

Gary O'Donovan  Anthony J. Blazevich  Colin Boreham  Ashley R. Cooper  Helen Crank  Ulf Ekelund 《Journal of sports sciences》2013,31(6):573-591

Absract

Our understanding of the relationship between physical activity and health is constantly evolving. Therefore, the British Association of Sport and Exercise Sciences convened a panel of experts to review the literature and produce guidelines that health professionals might use. In the ABC of Physical Activity for Health, A is for All healthy adults, B is for Beginners, and C is for Conditioned individuals. All healthy adults aged 18–65 years should aim to take part in at least 150 min of moderate-intensity aerobic activity each week, or at least 75 min of vigorous-intensity aerobic activity per week, or equivalent combinations of moderate- and vigorous-intensity activities. Moderate-intensity activities are those in which heart rate and breathing are raised, but it is possible to speak comfortably. Vigorous-intensity activities are those in which heart rate is higher, breathing is heavier, and conversation is harder. Aerobic activities should be undertaken in bouts of at least 10 min and, ideally, should be performed on five or more days a week. All healthy adults should also perform muscle-strengthening activities on two or more days a week. Weight training, circuit classes, yoga, and other muscle-strengthening activities offer additional health benefits and may help older adults to maintain physical independence. Beginners should work steadily towards meeting the physical activity levels recommended for all healthy adults. Even small increases in activity will bring some health benefits in the early stages and it is important to set achievable goals that provide success, build confidence, and increase motivation. For example, a beginner might be asked to walk an extra 10 min every other day for several weeks to slowly reach the recommended levels of activity for all healthy adults. It is also critical that beginners find activities they enjoy and gain support in becoming more active from family and friends. Conditioned individuals who have met the physical activity levels recommended for all healthy adults for at least 6 months may obtain additional health benefits by engaging in 300 min or more of moderate-intensity aerobic activity per week, or 150 min or more of vigorous-intensity aerobic activity each week, or equivalent combinations of moderate- and vigorous-intensity aerobic activities. Adults who find it difficult to maintain a normal weight and adults with increased risk of cardiovascular disease or type 2 diabetes may in particular benefit from going beyond the levels of activity recommended for all healthy adults and gradually progressing towards meeting the recommendations for conditioned individuals. Physical activity is beneficial to health with or without weight loss, but adults who find it difficult to maintain a normal weight should probably be encouraged to reduce energy intake and minimize time spent in sedentary behaviours to prevent further weight gain. Children and young people aged 5–16 years should accumulate at least 60 min of moderate-to-vigorous-intensity aerobic activity per day, including vigorous-intensity aerobic activities that improve bone density and muscle strength.  相似文献   

Risk of injury associated with rugby union played on artificial turf     

Colin W. Fuller  Lucy Clarke  Michael G. Molloy 《Journal of sports sciences》2013,31(5):563-570

Abstract

The aim of this study was to compare the incidence, nature, and cause of injuries sustained in rugby union played on artificial turf and grass. The study comprised a two-season investigation of match injuries sustained by six teams competing in Hong Kong's Division 1 and training injuries sustained by two teams in the English Premiership. Injury definitions and recording procedures were compliant with the international consensus statement on epidemiological studies of injuries in rugby union. There were no significant differences in the overall incidence (rate ratio = 1.42; P = 0.134) or severity (P = 0.620) of match injuries sustained on the two surfaces. The lower limb and joint (non-bone)/ligament injuries were the most common location and type of match injury on both surfaces; the incidence of anterior cruciate ligament injuries was nearly four times higher on artificial turf than grass but the difference was not statistically significant (rate ratio = 3.82; P = 0.222). There were no significant differences in the overall incidence (rate ratio = 1.36; P = 0.204) or severity (P = 0.302) of training injuries sustained on artificial turf and grass. The lower limb and muscle/tendon injuries were the most common location and type of training injury on both surfaces. The results indicate that the overall risks of injury on artificial turf are not significantly different from those experienced on grass; however, the difference in the incidence of anterior cruciate ligament injuries on the two surfaces is worthy of further study.  相似文献   

Intra- and inter-session reliability of vertical jump performance in healthy middle-aged and older men and women     

Massimiliano Ditroilo  Roberta Forte  David McKeown  Colin Boreham  Giuseppe De Vito 《Journal of sports sciences》2013,31(15):1675-1682

Abstract

Despite its widespread use in performance assessment, the reliability of vertical jump in an ageing population has not been addressed properly. The aim of the present study was to assess intra- and inter-day reliability of countermovement jump in healthy middle-aged (55–65 years) and older (66–75 years) men and women. Eighty-two participants were recruited and asked to perform countermovement jumps on two different occasions interspersed by 4 weeks. The middle-aged groups exhibited excellent absolute reliability for flight height, jump height, peak force, peak power, peak force/body mass, and peak power/body mass, with coefficients of variation ranging from 2.9% to 7.2% in men and from 3.6% to 6.9% in women and moderate-to-high intraclass correlations (0.75 to 0.97 in men; 0.77 to 0.95 in women). The older groups displayed good coefficients of variation (4.2% to 10.8% in men and 3.4% to 9.5% in women), but the intraclass correlations were low-to-high (0.43 to 0.84 in men; 0.42 to 0.93 in women). Overall, intra-session reliability was higher than inter-session reliability. Peak power was by far the most consistent variable, whereas flight and jump height had the most marked variability. The minimum detectable change varied from 10.5% to 33%, depending on the variable examined, suggesting important implications for intervention studies.  相似文献   

Language Across a Curriculum of Teacher Training: an instance of course development     

Colin Walter 《欧洲师范教育杂志》1983,6(1):65-70

This paper describes the ways in which the relationship between teaching and learning in schools, and pupil and teacher language, are explored by students and staff in the different elements of a one‐year postgraduate initial training course for Secondary teachers. It deals with how the staff of a quite large department attempt to keep the theoretical and practical expressions of the topic together by monitoring the manner in which the elements of the whole course structure interact.  相似文献   

The microelectronics revolution An assessment of its significance for education and teacher education     

Colin Mably 《欧洲师范教育杂志》1980,3(1):25-35

Mably, C. “The microelectronics revolution. An assessment of its significance for education and teacher education,” Revue ATEE Journal 3 (1980) 25‐35. Rapid advances in microtechnology, particularly in the field of microelectronics, and their subsequent applications in manufacturing, service and communication industries, have dramatic implications for social change. These changes pose fundamental questions for all levels of education and particularly for school curricula and the teacher in a changing society. Teacher education has a major responsibility in this urgent process and must now consider its response.  相似文献   

Community Involvement in Educational Goals: a Western Canadian Example     

Colin A. Thomson 《Compare》1977,7(2):93-103

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Post‐primary School Non‐academic Alternatives: a South Pacific study     

Colin Hindson 《比较教育学》1985,21(2):135-156

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Learning to labour: elementary education in the Leicestershire and South Derbyshire coalfield c. 1840-1870     

Colin Griffin 《History of education》2013,42(2):95-116

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Primary schools research and development     

Colin Richards 《Education 3-13》2013,41(1)

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Mission matters: The cost of small high schools revisited     

Leanna Stiefel  Amy Ellen Schwartz  Patrice Iatarola  Colin C. Chellman 《Economics of Education Review》2009,28(5):585-599

With the financial support of several large foundations and the federal government, creating small schools has become a prominent high school reform strategy in many large American cities. While some research supports this strategy, little research assesses the relative costs of these smaller schools. We use data on over 200 New York City high schools, from 1996 through 2003, to estimate school cost functions relating per pupil expenditures to school size, controlling for school output and quality, student characteristics, and school organization.We find that the structure of costs differs across schools depending upon mission—comprehensive or themed. At their current levels of outputs, themed schools minimize per pupil costs at smaller enrollments than comprehensive schools, but these optimally sized themed schools also cost more per pupil than optimally sized comprehensive schools. We also find that both themed and comprehensive high schools at actual sizes are smaller than their optimal sizes.  相似文献