Leisure time physical activity in Australian women: relationship with well being and symptoms

This paper explores the association between moderate levels of physical activity (PA) and health benefits in well being and symptoms such as tiredness, back pain, and constipation. Participants in the Australian Longitudinal Study on Women's Health, 14,502 young women (ages 18-23 years), 13,609 middle-age women (45-50 years), and 11,421 older women (ages 70-75 years), answered questions about vigorous and less vigorous exercise (used to determine a physical activity score), well being (SF-36), symptoms, and medical conditions. There were significant associations between the PA score and SF-36 in each cohort. Odds ratios (OR) for a range of symptoms and conditions were lower for women who reported low to moderate activity than for sedentary women, for example, for young women or for constipation = 0.76 (CI, 0.65-0.89), for middle-age women or for tiredness = 0.70 (0.63-0.78). There was no threshold of PA at which health benefits increased significantly. Although cross-sectional, the findings suggest that low-to-moderate levels of exercise are associated with a range of health benefits for women of all ages. These preliminary findings will be followed up during the longitudinal study.     

Academic medical libraries' policies and procedures for notifying library users of retracted scientific publications

Academic medical libraries have a responsibility to inform library users regarding retracted publications. Many have created policies and procedures that identify flawed journal articles. A questionnaire was sent to the 129 academic medical libraries in the United States and Canada to find out how many had policies and procedures for identifying retracted publications. Of the returned questionnaires, 59% had no policy and no practice for calling the attention of the library user to retracted publications. Forty-one percent of the libraries called attention to retractions with or without a formal policy for doing so. Several responding libraries included their policy statement with the survey. The increasing number of academic medical libraries that realize the importance of having policies and practices in place highlights the necessity for this procedure.     

美国企业档案的市场定位（节选）

当企业档案的确能给公司增加财富,今天的文件资料才是必不可少的.许多企业档案工作者确信只有在公司内部工作,档案才能真正有效地帮助解决当前问题和协助决策.企业内部档案工作者在这方面具有优势.他们是见证人,并且熟知关键人物及其支持者.正如CIGNA的公司档案员所总结说,没有一个外部人员了解公司的历史知识、专有技术并且真正明白利益关系,只有那些受过良好训练、有经验的公司档案工作者和历史学家才能做到.凭我个人的经验,我知道在走廊、电梯或者公司食堂偶遇时漫不经心的交谈往往会引发有利于第一线的重要方案的产生,如果档案完全安置在公司之外的话,这种机会根本就不会有.     

不同时间的运动后血清睾酮浓度的变化

导言体育运动对血清激素及代谢产物的影响已有许多的报道。在不同类型强度及持续时间的体力活动后,特别是对睾酮的特性方面已经进行了研究。不同条件的对象中,在人和大鼠方面已表明了许多形式的体育运动伴有血睾酮水平的降低。然而拉姆等报导激烈的运动后血睾酮无变化。其他研究者已证明,在运动后血睾酮的水平均增加。由于所检查的对象的身体状态不同,有的是不爱活动的人、有军校学员、运动员以及由于运动后测定激素的时间的不同,因此     

关于德育方法

在教育事业中,形式主义危害极大,尤其是德育工作的大敢。形式主义不仅使工作难于向前发展,而且会使已经取得的成绩遭到破坏。     

用次最大心率估计最大吸氧量

前言本研究对用三种不同负荷后的心率来估计最大吸氧量的效果作了调查。让二十四名男性受试者在功率自行车上作三种负荷的运动(负荷分别是600、750、900Kpm’s),每种负荷运动持续六分钟,第二天重复一次。对心率、最大吸氧量估计值、最大吸氧量剩余估计值进行方差分析,用皮尔逊差积相关公式(Pearson Product-momeilt formula of correlation)计算最大吸氧量实际值和估计值的相关系数。第二天和第一天的结果相比较,最大吸氧量的估计值明显增加,标准误明显减少(450ml减少到366ml),这似乎说明第二天的