Effects of exercise training with weighted vests on bone turnover and isokinetic strength in postmenopausal women

The effects of 12 wk of exercise training using weighted vests on bone turnover and isokinetic strength were evaluated in postmenopausal women randomly assigned as exercisers (EX; n = 9) or controls (CON; n = 7). Training included 3 multimodal exercise sessions per wk wearing weighted vests. The vest load was progressively increased each wk to a maximum of 15% of body weight. Bone turnover was determined from resting levels of serum osteocalcin and NTx. Knee and ankle strength were measured at 60 degrees/s and 180 degrees/s using an isokinetic dynamometer. After 12 wk, NTx decreased by 14.5% (P 相似文献   

Enhancing engagement between the population,environment, and climate research communities: the shared socio-economic pathway process

Demographers have much to contribute to climate change science. This paper describes a new framework being developed by the climate research community that holds potential as an organizing tool for population–climate scholarship, as well as being useful for identifying demographic research gaps within the climate change field. The shared socio-economic pathways (SSPs) represent plausible alternative trends in the evolution of social and natural systems over the twenty-first century at the scale of the world and large regions. The SSPs can help identify population–environment research gaps by illuminating areas of intersection that will shape climate futures but require deeper scientific understanding—the association between urbanization and energy consumption is an example. Also, to vastly enhance the policy relevance of local case studies, the parameters outlined within the SSPs can offer a basic level of harmonization to facilitate generalization. In this way, the SSP framework can increase the relevance and accessibility of population research and, therefore, offer a mechanism through which demographic science can truly offer policy impact.     

Researchers' views of the acceptability of restrictive provisions in clinical trial agreements with industry sponsors

We conducted a mail survey of 884 U.S. medical school faculty active in clinical research to elicit their views about the acceptability of provisions in contracts for industry-sponsored clinical trials that would restrict investigators' academic freedom and control over trials. We compared their responses to results from a similar survey of research administrators at 107 medical schools. There was substantial variation among clinical researchers in their acceptability judgments, with a relatively large proportion of clinical trial investigators willing to accept provisions that give industry sponsors considerable control over the dissemination of research results. There were significant differences in the perceptions of clinical trial investigators versus other recently published clinical researchers; investigators with a high versus low percentage of research support from industry; junior versus senior faculty; and investigators at institutions with high versus low National Institute of Health (NIH) funding ranks. There was also a significant divergence of views in a number of areas between clinical trialists and research administrators who negotiate clinical trial contracts on their behalf. Medical school faculty could benefit from additional guidance about what their institution views as acceptable parameters for industry-sponsored clinical trial agreements.     

Anticipating relocation: concerns about moving among NORC residents

Most older adults prefer to live at home as long as possible, requiring supports and services to help them age in place. This study examines the relocation concerns of a group of older adults in a suburban naturally-occurring retirement community (NORC). Twenty-six percent of the 324 residents interviewed expressed concern about having to move in the next few years. Residents who were worried differed from those who did not worry on a number of demographic and biopsychosocial characteristics. Overall, residents present a profile of vulnerability that calls for preemptive action to help them stay in their homes. A NORC is an ideal setting in which to provide supportive services.     

A Revision of the Questionnaire for Couples in Stepfamilies

This study describes the efforts to develop and validate the Revised Questionnaire for Couples in Stepfamilies (RQCS). Utilizing exploratory and confirmatory factor analytic techniques, a 22-item scale is presented. Concurrent validity between the original and revised instruments is assessed with a measure of marital instability. Two independent samples, from different regions of the United States, are used to cross-validate the findings. Results suggest that relative to the original instrument, the RQCS can be used to assess 4 domains of stepfamily difficulties without significant loss of measurement precision.     

Female Juvenile Sexual Offenders: Understanding Who They Are and Possible Steps That May Prevent Some Girls From Offending

In recent years, there has been accumulating evidence that sexual abuse committed by females is not rare and can be just as traumatic as sexual abuse committed by males. Despite the increased recognition given to sex offending by adult women, however, very little attention has been given to sex offenses committed by juvenile females. There has further been very little published material that has focused specifically on intervening with female children and adolescents before they offend. In an attempt to fill this gap, this article describes common characteristics of juvenile female sex offenders, ways in which juvenile female sex offenders are similar to and different from juvenile male sex offenders, and the limitations that exist related to our knowledge about these offenders. Based on this information, suggestions are given for possible ways to intervene in the lives of at-risk female youth before they offend.     

Integrating Power? Evaluating Public Relations Influence in an Integrated Communication Structure

The emerging integrated environment for communication functions has put public relations in a potentially compromising position. In particular, literature reviews reveal scholar concerns about an inferior technical role for public relations practitioners. The question of integrating communications may be a question of power: whether the public relations function enacts influence, authority, or capacity to affect decision-making within an integrated organization. This study explores perceptions of 20 public relations professionals in an integrated communication structure. Results show that public relations may gain the ability to enact influence through social media acumen and the interconnected structure of communications, in which practitioner expertise, information, and knowledge may lead to more influence.     

Restudying Cañamelar of The People of Puerto Rico

This article discusses an unknown restudy of one locale of the People of Puerto Rico Project–my own. From 1980 to 1982 the author did ethnographic fieldwork in Bo. Jauca, Santa Isabel, the research site of Sidney Mintz. Building on Mintz's work, my goal was to take our shared historical materialism further, into a broader analysis of capitalism, colonialism, class, politics, and power. Where Mintz framed his study within production units, such as Colonia Destino and Central Aguirre, my study began with analysis of the oligarchic structure of the United States sugar industry as a whole, and how it shaped colonial policy. Where the People of Puerto Rico Project reconstructed insular class and political patterns as context for local studies, the restudy took islandwide class structure and political positions as a focus of analysis in itself. Where the earlier work chronicled the rise of a plantation system and rural proletariat, the later study explored their decline—why did the Puerto Rican sugar industry collapse, and how did seemingly homogenous Jauquenos differentiate into a graded system of stratification? The years from 1948 to 1982 saw other class transformations, as the rural proletariat was recast into the larger, more diffuse, and less politically potent category of “the poor” and life circumstances of all Jauqenos became more individuated and dependent on state power centers in San Juan and Washington.