Relative safety: risk and unprotected anal intercourse among gay men diagnosed with HIV

Duration: January 1998 - January 1999 This study investigated the experiences of gay men with diagnosed HIV in order to better understand the range of social, psychological and cultural meanings attached to HIV risk. We examined how men engaged in unprotected anal intercourse (UAI) and how they felt about it. We looked at the meanings they attached to UAI, the risks (if any) they perceived, and how engaging in UAI affected their lives. The study generated data from two sources. First, information on sexual risk behaviour was provided by the second annual Gay Men's Sex Survey in 1998. We compared the demographics and sexual behaviour of men diagnosed with HIV, those who had never tested and those who had tested negative in order to gain a comparative picture of sexual risk behaviour. This data demonstrated that, on a population level, substantial differences in sexual behaviour occurred between men who had never tested for HIV and those that had. Men who had never tested were substantially less likely to engage in sexual activities implicated in HIV exposure (UAI and sero-discordant UAI) compared to those who had tested. Among those who had tested, men with diagnosed HIV were no more likely to engage in UAI than those tested negative. However, among men that engaged in UAI, men who had tested positive did so substantially more often. The study also included 64 in-depth, semi-structured interviews with gay men who had diagnosed HIV. All had engaged in UAI in the previous year: some with partners who they knew were also HIV infected; others with partners whom they knew to be uninfected; and some with partners whose HIV status they did not know. Most interviewees had done UAI with a range of partners from all three categories. We found that UAI was an act that resists easy classification, imbued with multiple meanings, it's perceived safety and desirability dependent upon the circumstances in which it occurs and the partners involved. Moreover, the concepts of safety and risk that health promoters employ in relation to UAI were not necessarily shared by the positive men we interviewed. Important for our purposes was that gay men with diagnosed HIV engaging in UAI, felt they were risking something entirely different to their uninfected partners. For them, risk was experienced in a mediated and diffuse manner on three levels: risks to personal health, risks to psychological well-being and risks to social standing. The final report was called Relative safety: risk and unprotected anal intercourse among gay men diagnosed with HIV

Practical applications of biomechanical principles in resistance training: moments and moment arms

Exercise professionals routinely prescribe resistance training to clients with varied goals. Therefore, they need to be able to modify the difficulty of a variety of exercises and to understand how such modifications can alter the relative joint loading on their clients so to maximise the potential for positive adaptation and to minimise injury risk. This paper is the first in a three part series that will examine how a variety of biomechanical principles and concepts have direct relevance to the prescription of resistance training for the general and athletic populations as well as for musculoskeletal injury rehabilitation. In this paper, we start by defining the terms moment (torque), moment arms, compressive, tensile and shear forces as well as joint stress (pressure). We then demonstrate how an understanding of moments and moment arms is integral to the exercise professionals’ ability to develop a systematic progression of variations of common exercises. In particular, we examine how a variety of factors including joint range of motion, body orientation, type of external loading, the lifter’s anthropometric proportions and the position of the external load will influence the difficulty of each exercise variation. We then highlight the primary results of several selected studies which have compared the resistance moment arms and joint moments, forces or stresses that are encountered during selected variations of common lower body resistance training exercises. We hope that exercise professionals will benefit from this knowledge of applied resistance training biomechanics and be better able to systematically progress exercise difficulty and to modify joint loading as a result. The two remaining articles in this series will focus on the neuromechanical properties of the human musculoskeletal system and better understanding the biomechanical implications of a variety of alternative resistance training techniques, respectively

Framework for better living with HIV in England

Duration: April 2007 - May 2009 Sigma Research was funded by Terrence Higgins Trust to co-ordinate the development of a framework to address the health, social care, support and information needs of people with diagnosed HIV in England. It has now been published as the Framework for better living with HIV in England. The over-arching goal of the framework is that all people with diagnosed HIV in England "are enabled to have the maximum level of health, well-being, quality of life and social integration". In its explanation of how this should occur the document presents a road map for social care, support and information provision to people with diagnosed HIV in England. By establishing and communicating aims and objectives, the framework should build consensus and provide a means to establish how interventions could be prioritised and coordinated. The key drivers for the framework were clearly articulated ethical principles, agreed by all those who sign up to it, and an inclusive social development / health promotion approach. Sigma Research worked on the framework with a range of other organisations who sent representatives to a Framework Development Group (see below for membership). The framework is evidence-based and seeks to: Promote and protect the rights and well-being of all people with HIV in England. Maximise the capacity of individuals and groups of people with HIV to care for, advocate and represent themselves effectively. Improve and protect access to appropriate information, social support, social care and clinical services. Minimise social, economic, governmental and judicial change detrimental to the health and well being of people with HIV. Alongside the development of the framework, Sigma Research undertook a national needs assessment among people with diagnosed HIV across the UK called What do you need?. These two projects informed and supported each other. Framework Development Group included: African HV Policy Network Black Health Agency George House Trust NAM NAT (National AIDS Trust) Positively Women Terrence Higgins Trus

Grevious harm: Use of the Offences Against the Person Act 1861 for sexual transmission of HIV

No abstract available

The growing challenge: a strategic review of HIV social care, support and information services across the UK

No abstract available

Morality, responsibility and risk: Gay men and proximity to HIV

No abstract available

Practical applications of biomechanical principles in resistance training: The use of bands and chains

In recent years, it has become popular for athletes and recreational trainers to perform resistance training with the addition of bands and chains. In this paper, we consider the advantages of manipulating an exercise to match the resistance provided with the force capabilities of the lifter, which generally change throughout the movement. We explain that bands and chains can be used to manipulate a variety of exercises that have the potential to enhance performance in sport and in many daily tasks. Whilst there are many similarities between the use of bands and chains for resistance training, we note that there are key differences and discuss the biomechanics of each material separately. In particular, we discuss that chains provide resistance primarily in the vertical plane and the resistance is linearly related to the displacement of the barbell. In contrast, bands can be set up to produce substantial horizontal forces in addition to the primary resistance force that often acts in the vertical direction. Also, research has demonstrated that bands provide a resistance force that is related in a curvilinear fashion to the displacement of the barbell. After introducing the main biomechanical features associated with each type of resistance material, we present findings from the strength and conditioning literature that has demonstrated the potential for bands and chains to improve the stimulus associated with strength and power training. At present, a more compelling evidence base has emerged for the use of bands in resistance training, particularly with regard to the development of power. It is not known whether this asymmetry reflects the greater number of studies conducted with bands or is influenced by methodological differences between studies. However, we also discuss the possibility that different inertial properties of bands compared with chains may make the former a more effective choice for the development of power. We hope that exercise professionals will benefit from this knowledge and obtain insight into how an understanding of biomechanical principles can assist with prescribing contemporary training regimes