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Comparison of 1 and 2 days per week of strength training in children   总被引:1,自引:0,他引:1  
The purpose of this study was to compare the effects of 1 and 2 days per week of strength training on upper body strength, lower body strength, and motor performance ability in children. Twenty-one girls and 34 boys between the ages of 7.1 and 12.3 years volunteered to participate in this study. Participants strength trained either once per week (n = 22) or twice per week (n = 20) for 8 weeks at a community-based youth fitness center. Each training session consisted of a single set of 10-15 repetitions on 12 exercises using child-size weight machines. Thirteen children who did not strength train served as age-matched controls. One repetition maximum (1RM) strength on the chest press and leg press, handgrip strength, long jump, vertical jump, and flexibility were assessed at baseline and posttraining. Only participants who strength trained twice per week made significantly greater gains in 1RM chest press strength, compared to the control group (11.5 and 4.4% respectively, p < .05). Participants who trained once and twice per week made gains in 1RM leg press strength (14.2 and 24.7%, respectively) that were significantly greater than control group gains (2.4%). On average, participants who strength trained once per week achieved 67% of the 1RM strength gains. No significant differences between groups were observed on other outcome measures. These findings support the concept that muscular strength can be improved during the childhood years and favor a training frequency of twice per week for children participating in an introductory strength training program.  相似文献   
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Co‐teaching is a widely used instructional approach to meet the needs of all students in inclusive classrooms across the globe. Despite the widespread implementation of the practice, little is known about how teachers are prepared to use it. This study examined the extent to which 77 teachers were prepared to use co‐teaching. Results indicated that a majority of the teachers are underprepared in its use. Recommendations and implications are discussed.  相似文献   
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The purpose of this study was to understand factors that may affect the usage of a consumer health center located in a public library. More specifically, the authors wanted to know what health resources are of interest to the community, what patrons'' perceptions of their experience at the center are, and finally, how staff can increase utilization of the center. In general, perceptions of the center were positive. The findings support that participants appreciate efforts to provide health information in the public library setting and that utilization could be improved through marketing and outreach.Problems with health literacy—one''s ability to obtain, process, and understand basic information and services needed to make appropriate health decisions 1, 2—significantly limit effective dissemination and understanding of relevant health information, especially among racial and ethnic minorities where health literacy challenges are pervasive 35. People with limited health literacy skills have higher medical costs and use an inefficient mix of medical services 3, 613. This compromises their health and is a major source of economic inefficiency in the US health care system. Efforts to address low health literacy may result in reductions of health inequities, decreased medical costs, and enhanced quality of life 14. However, efforts to promote health literacy that seek to empower individuals to understand health information and act in their own interest remain an underexplored pathway to improved health outcomes 9.The National Network of Libraries of Medicine (NN/LM) encourages libraries to reach out to low literacy groups in their surrounding communities to address literacy challenges 1517. These actions have resulted in development of consumer health libraries, centers where patrons can get accurate and timely health information. Preliminary investigations of consumer health libraries have reinforced the value of these services 18, 19, but there is little information regarding the provision of similar services in other public settings.The Healthy Living and Learning Center (HLLC), located in a public library in Petersburg, Virginia, was established in 2012 to provide one-on-one assistance in accessing health information and community resources. According to 2010–2013 census data, 25% of Petersburg residents are below the poverty line 20. Localities surrounding the HLLC experience some of the most unfavorable health outcomes in Virginia 21. In addition, 16%–24% of citizens in the surrounding localities are illiterate 22.The public library setting provides an appropriate context to initiate consumer health centers outside of medical settings. Librarians are already being asked to meet consumer demands for health information 1517, and the provision of accurate health information is a natural extension of the services that public libraries provide. The American Library Association reports that 62% of libraries report that they are the only source of free public access to computers and the Internet in their communities 23. According to a recent study from Pew, 35% of Americans 16 and older say they have used free Internet access points, 47% of whom have used these services to get health information 24. For a number of minorities, the public library is the only place they have Internet access 25. Thus, libraries not only remain a critical resource among the public, but may also have unique access to populations who are more vulnerable to health inequities.  相似文献   
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The 1984 Los Angeles Olympic Games created a new sponsorship model for organising committees, changed perceptions about the value of hosting the Games, encouraged greater reliance on television revenue and generated a $232.5 million surplus. Although observers rarely cite sports venues as a 1984 legacy, the Los Angeles Olympics resulted in the construction or improvement of nearly 100 sport facilities in Southern California in three decades following the Games. These sports spaces served more than 500,000 young people annually. Much of the construction funding came from grants made by the LA84 Foundation, which was endowed with Southern California's share of the 1984 surplus. The Los Angeles Olympic Organizing Committee (LAOOC) achieved a surplus by producing substantial revenues while tightly controlling costs. A key element of cost control was limited spending on Olympic venues. The LAOOC built only three new venues, relying on existing stadiums for all other venues. The LAOOC's construction budget was significantly lower than those of other Olympic organisers in the 1980s and 1990s. Thus, by building very few new venues for the 1984 Games, the LAOOC laid the groundwork for a legacy of sports fields, tracks, gymnasiums and pools built or improved after 1984.  相似文献   
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Within the past decade, academic libraries have seen a shift in purchasing from mostly print to mostly electronic. Although Carleton University Library (Ottawa, Canada) has experienced this shift, it had continued until recently to work within the confines of an organizational structure based on a print purchasing model. This paper will describe in detail the restructuring of the Library's collections and technical services departments to better meet growing electronic demands. Changes included dedicating more staff from print resources to e-resources, changing a librarian position to focus specifically on collections assessment, and shifting budgets to manage growing e-resources more efficiently.  相似文献   
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Drawing upon the theory of networked gatekeeping, this study describes how citizens engage in Twitter conversations with journalists and illustrates the power dynamic between traditional gatekeepers (journalists) and the gated (news audience). The power dynamic is discussed along four attributes of the gated—political power, information production ability, relationship with gatekeepers, and information alternatives. Results show that citizens interacted with gatekeepers by sharing information/opinion, social chats, and self-serving promotion of individual opinions and agendas. Politically active citizens interacted more often with journalists who share similar ideology. The citizens have varying degrees of political power, reflected by their different levels of involvement and influence in political discourse online. The implications for gatekeeping are also addressed.  相似文献   
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Five news media in the U.S. were examined to determine the optimaltime-lag for agenda-setting effects to occur for each. Publicresponses to an open-ended question ‘What is the numberone problem facing our country today?’ were compared tomedia coverage from one to 26 weeks earlier. A number of differenceswere found across the five media. The results show that televisioncoverage had a shorter optimal time-lag than newspapers. Themore immediate effect of television news, however, quickly deteriorated,and newspapers had a stronger long-term agenda-setting effect.National and regional media also had a more immediate impactthan local media. All media, generally, had slightly shorteroptimal time-lags than previous research would suggest.  相似文献   
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