An evidence-based socioecological framework to understand men’s use of anabolic androgenic steroids and inform interventions in this area

Research into men’s use of anabolic androgenic steroids (AAS) over the past three decades has identified many factors that contribute to decision making in this area. However there are limited theoretical frameworks to synthesize this research and guide practice, such as interventions to prevent use or reduce health risks. To address this gap a socioecological framework is presented based upon the international literature examining AAS use. Socioecological models recognize that individuals and behaviors exist within complex physical and social systems and are useful tools for guiding interventions to ensure consideration is given to multiple influential factors. This framework proposes that use of AAS is the result of the interaction of a range of factors at the individual, social network, institutional, community and societal levels that are likely to change over time and with experience. Viewed through this framework it becomes clear that AAS use can be a complex behavior with many influential environments and relationships impacting on a diverse population in different ways and at different times. The implications of findings for engaging with people who use AAS and delivering interventions are discussed, such as the identification of important transition times and influencing norms within social groups and communities

Land use, transport, and population health: estimating the health benefits of compact cities.

Using a health impact assessment framework, we estimated the population health effects arising from alternative land-use and transport policy initiatives in six cities. Land-use changes were modelled to reflect a compact city in which land-use density and diversity were increased and distances to public transport were reduced to produce low motorised mobility, namely a modal shift from private motor vehicles to walking, cycling, and public transport. The modelled compact city scenario resulted in health gains for all cities (for diabetes, cardiovascular disease, and respiratory disease) with overall health gains of 420-826 disability-adjusted life-years (DALYs) per 100 000 population. However, for moderate to highly motorised cities, such as Melbourne, London, and Boston, the compact city scenario predicted a small increase in road trauma for cyclists and pedestrians (health loss of between 34 and 41 DALYs per 100 000 population). The findings suggest that government policies need to actively pursue land-use elements-particularly a focus towards compact cities-that support a modal shift away from private motor vehicles towards walking, cycling, and low-emission public transport. At the same time, these policies need to ensure the provision of safe walking and cycling infrastructure. The findings highlight the opportunities for policy makers to positively influence the overall health of city populations

Testing the activitystat hypothesis: a randomised controlled trial protocol

Background: The activitystat hypothesis proposes that when physical activity or energy expenditure is increased or decreased in one domain, there will be a compensatory change in another domain to maintain an overall, stable level of physical activity or energy expenditure. To date, there has been no experimental study primarily designed to test the activitystat hypothesis in adults. The aim of this trial is to determine the effect of two different imposed exercise loads on total daily energy expenditure and physical activity levels. Methods. This study will be a randomised, multi-arm, parallel controlled trial. Insufficiently active adults (as determined by the Active Australia survey) aged 18-60 years old will be recruited for this study (n=146). Participants must also satisfy the Sports Medicine Australia Pre-Exercise Screening System and must weigh less than 150 kg. Participants will be randomly assigned to one of three groups using a computer-generated allocation sequence. Participants in the Moderate exercise group will receive an additional 150 minutes of moderate to vigorous physical activity per week for six weeks, and those in the Extensive exercise group will receive an additional 300 minutes of moderate to vigorous physical activity per week for six weeks. Exercise targets will be accumulated through both group and individual exercise sessions monitored by heart rate telemetry. Control participants will not be given any instructions regarding lifestyle. The primary outcome measures are activity energy expenditure (doubly labeled water) and physical activity (accelerometry). Secondary measures will include resting metabolic rate via indirect calorimetry, use of time, maximal oxygen consumption and several anthropometric and physiological measures. Outcome measures will be conducted at baseline (zero weeks), mid- and end-intervention (three and six weeks) with three (12 weeks) and six month (24 week) follow-up. All assessors will be blinded to group allocation. Discussion. This protocol has been specifically designed to test the activitystat hypothesis while taking into account the key conceptual and methodological considerations of testing a biologically regulated homeostatic feedback loop. Results of this study will be an important addition to the growing literature and debate concerning the possible existence of an activitystat. Trial registration. Australian New Zealand Clinical Trials Registry ACTRN12610000248066

The virtual special section of active transport papers from the 2017 active living research conference

Since 2004, the Active Living Research (ALR) Conference has focused on advancing knowledge and practice related to the creation of communities that increase opportunities for physical activity. Communities designed for active living are better for health, economic vitality, and environmental sustainability. The Annual ALR Conference serves as a premier venue for cross-disciplinary learning, as over 30 disciplines are represented among participants. This commentary serves as an introduction to a virtual Special Section of Journal of Transport and Health that includes several of the best transport-related studies that were presented at ALR 2017. The theme of the 2017 ALR Conference, Active Living across the Life Span, placed emphasis on the importance of promoting physical activity from childhood through mature adulthood and offered solutions for achieving this goal. The theme challenged attendees to consider the myriad needs across age cohorts and the ways that community design, policies, and programs affect opportunities for active living. The conference highlighted the importance of policy-relevant research and facilitated cross-sector exchange among scientists, practitioners, and policymakers to create and sustain active living environments where residents can grow, live, and thrive at any age. Jana Lyncott from the AARP Public Policy Institute delivered the Keynote Address on creating environments for active and engaged living for all ages. The presentation provided examples from communities across the United States that are promoting livability and fostering healthy, active, and engaged lifestyles. The presentation highlighted AARP's Livability Index, which scores neighborhoods and communities for the services and amenities that have a significant impact on residents. The featured panel included Drs. Adrian Bauman, NiCole Keith, and David Bann and focused on the challenges of integrating equity perspectives in research on active living across the lifespan. Dr. Bauman, from Australia, shared lessons from his research on middle-age-to-older adults and his international collaborations. Dr. Keith, from the United States, described the effort to ensure disadvantaged populations were given high priority in developing the multi-sector strategies of the US National Physical Activity Plan. Dr. Bann, from the UK, presented findings on active living across the lifespan from a large, long-term birth cohort study. The second panel featured Deputy Commissioner Adetokunbo 'Toks' Omishakin, (Tennessee Department of Transportation), Councillor Kristyn Wong-Tam (City of Toronto, Canada), and Otis Johnson (Former Mayor of Savannah, Georgia) and provided local and state examples of active transportation and lessons learned. A clear takeaway from the keynote and panelists was the need to integrate and apply life-course research and practice/policy lessons learned to most effectively create activity-supportive cities. The concept of active living includes physical activity for all purposes, including transport, recreation, occupation, and household. Active transport continues to be a dominant theme at ALR Conferences, and the link between transport and health outcomes is rising on research and policy agendas internationally, as shown by extensive coverage in Journal of Transport and Health and the 2016 Lancet Series on Urban Design, Transport, and Health. In the Lancet Series, Giles-Corti and colleagues (2016) reviewed a wide range of physical, mental, and social health problems linked with motorized transport. Stevenson and colleagues (2016) reported models that revealed a shift of just 10% of motorized trips to active modes could produce important reductions in mortality in cities as diverse as Copenhagen and Delhi. Thus, as co-chairs of the ALR 2017 Conference we want to thank Dr. Jennifer Mindell, Editor-in-Chief of Journal of Transport and Health, for facilitating this virtual special section of papers that will further advance evidence on active transport and health

The Relative Contributions of Psychological, Social, and Environmental Variables to Explain Participation in Walking, Moderate-, and Vigorous-Intensity Leisure Time Physical Activity

This study assessed the relative contributions of psychological, social, and environmental variables to walking, moderate- and vigorous-intensity physical activity. Methods: A questionnaire was mailed to a random sample (57% response rate). Analyses used a backwards elimination logistic regression model, removing and replacing individual variables, and adjusting for age, gender, household composition, and education (N = 1827). Results: The sociodemographic and correlate variables collectively accounted for 43% of the variation in total activity, 26% of walking, 22% of moderate-intensity activity and 45% of vigorous-intensity activity (Nagelkerke R2). Individually, the correlates accounted for 0.0 to 4.0% of unique variation, with habit, efficacy, and support having higher values. Physical health, discouragement, competi-tion, and time management contributed more to vigorous-intensity activity. Anticipated benefits of social interactions and weight management contributed more to moderate-intensity activity. Neighborhood aesthetics contributed more to walking. Conclusion: Walking, moderate- and vigorous-intensity activity might be associated with different correlates