Advancing the Science and Application of Implementation Science to Promote Health Equity: Commentary on the Symposium.

There has been an increasing focus on making health equity a more explicit and foundational aspect of the research being conducted in public health and implementation science. This commentary provides an overview of five reviews in this Annual Review of Public Health symposium on Implementation Science and Health Equity. These articles reflect on and advance the application of core implementation science principles and concepts, with a focus on promoting health equity across a diverse range of public health and health care settings. Taken together, the symposium articles highlight critical conceptual, methodological, and empirical advances in the study designs, frameworks, and approaches that can help address equity considerations in the use of implementation science in both domestic and global contexts. Finally, this commentary highlights how work featured in this symposium can help inform future directions for rapidly taking public health to scale, particularly among systemically marginalized populations and communities.

Who Benefits? A Mixed Methods Study Assessing Community Use of a Major Metropolitan Park During the COVID-19 Pandemic.

By providing spaces for recreation, physical activity, social gatherings, and time in nature, urban parks offer physical, mental, and social benefits to users. However, many urban residents face barriers to park use. The COVID-19 pandemic introduced new potential barriers to urban park access and use, including changes to daily life and employment, closure of park amenities and restrictions to public movement, and risk from the coronavirus itself. The mixed-methods PARCS study measured use and perceptions of a large urban park in St. Louis, Missouri before, during, and after local COVID-19 contingency measures and restrictions. We examine data from 1,157 direct observation assessments of park usership, an online survey of park users (n=561), interviews with key stakeholders (n=27), four focus groups (n=30), and a community-based participatory research sub-study (n=66) to comprehensively characterize the effects of the COVID-19 pandemic on park use. Park users who felt unsafe from the coronavirus experienced 2.65 higher odds of reducing park use. However, estimated park visits during COVID-19 contingency measures (n=5,023,759) were twice as high as post-contingency (n=2,277,496). Participants reported using the park for physical activity, recreation, time in nature, and socializing during the contingency period. Black, Hispanic/Latino, and young people were less likely to visit the park than others, suggesting an additional, disproportionate impact of the pandemic on minoritized and socioeconomically disadvantaged communities. This study highlights the role of public spaces like parks as resources for health and sites where urban health inequities can be alleviated in times of public crisis.

Implementation processes of social network interventions for physical activity and sedentary behavior among children and adolescents: a scoping review.

BACKGROUND: The characteristics of the implementation process of interventions are essential for bridging the gap between research and practice. This scoping review aims to identify the implementation process of social network interventions (SNI) to address physical activity and sedentary behaviors in children and adolescents. METHODS: The scoping review was conducted adhering to the established guidelines. The search was carried out in the ERIC, EBSCO, EMBASE, SCOPUS, and Lilacs databases in April 2023. Social network intervention studies in children and adolescents were included, addressing physical activity or sedentary behaviors. Replicability (TIDieR), applicability (PRECIS-2), and generalizability (RE-AIM) were the explored components of the implementation process. Each component was quantitatively and separately analyzed. Then, a qualitative integration was carried out using a narrative method. RESULTS: Most SNI were theoretically framed on the self-determination theory, used social influence as a social mechanism, and used the individual typology of network intervention. Overall, SNI had strong replicability, tended to be pragmatic, and three RE-AIM domains (reach, adoption (staff), and implementation) showed an acceptable level of the generalizability of findings. CONCLUSIONS: The analyzed SNI for physical activity and sedentary behaviors in adolescents tended to be reported with high replicability and were conducted pragmatically, i.e., with very similar conditions to real settings. The RE-AIM domains of reach, adoption (staff), and implementation support the generalizability of SNI. Some domains of the principles of implementation strategies of SNI had acceptable external validity (actor, action targets, temporality, dose, and theoretical justification).

Equipping the Public Health Workforce of the Future: Evaluation of an Evidence-Based Public Health Training Delivered Through Academic-Health Department Partnerships.

OBJECTIVE: Maintaining a skilled public health workforce is essential but challenging given high turnover and that few staff hold a public health degree. Situating workforce development within existing structures leverages the strengths of different organizations and can build relationships to address public health challenges and health equity. We implemented and evaluated an innovative, sustainable model to deliver an established evidence-based public health (EBPH) training collaboratively among Prevention Research Centers (PRC), local and state health departments, and Public Health Training Centers (PHTC). DESIGN: Quantitative data: quasi-experimental, 1-group pre-post. Qualitative data: cross-sectional. Data were collected between December 2021 and August 2022. SETTING: Four US sites, each a partnership between a PRC, local or state health department, and a PHTC. PARTICIPANTS: Governmental public health staff and representatives from other organizations that implement public health programs in practice settings. MAIN OUTCOME MEASURES: Course participants completed a pre- and postcourse survey self-rating 14 skills on a 5-point Likert scale. Differences were analyzed using mixed effects linear models. In-depth interviews (n = 15) were conducted with course faculty and partners to understand: (1) resources contributed, (2) barriers and facilitators, (3) benefits and challenges, and (4) resources needed to sustain this model. Interviews were transcribed verbatim, and a thematic analysis identified themes. RESULTS: Statistically significant increases in all skills were observed from pre- to postcourse (n = 241 at post, 90% response). The skills with the largest increases were understanding economic evaluation enough to inform decision-making (mean change = 1.22, standard error [SE] = 0.05) and developing an action plan (mean change = 1.07, SE = 0.07). Facilitators to delivering the course included having a shared goal of workforce development, existing course curricula, and dedicated funding for delivering the course. CONCLUSIONS: Collaborative delivery of the EBPH training can ameliorate the effects of high staff turnover, strengthen academic-practice relationships, and promote population-wide health and health equity.

Municipal officials' perspectives on policymaking for addressing obesity and health equity.

Background: Obesity evidence-based policies (EBPs) can make a lasting, positive impact on community health; however, policy development and enactment is complex and dependent on multiple forces. Aims and objectives: This study investigated key factors affecting municipal officials' policymaking for obesity and related health disparities. Methods: Semi-structured interviews were conducted with 20 local officials from a selection of municipalities with high obesity or related health disparities across the United States between December 2020 and April 2021. Findings: Policymakers follow a general decision-making process with limited distinction between health and other policy areas. Factors affecting policymaking included: being informed about other local, state, and federal policy, conducting their own research using trustworthy sources, and seeking constituent and stakeholder perspectives. Key facilitators included the need for timely, relevant local data, and seeing or hearing from those impacted. Key local policymaking barriers included constituent opposition, misinformation, controversial issues with contentious solutions, and limited understanding of the connection between issues and obesity/health. Policymakers had a range of understanding about causes of health disparities, including views of individual choices, environmental influences on behaviors, and structural factors impacting health. To address health disparities, municipal officials described: a variety of roles policymakers can take, limitations based on the scope of government, challenges with intergovernmental collaboration or across government levels, ability of policymakers and government employees to understand the problem, and the challenge of framing health disparities given the social-political context. Discussion and conclusion: Understanding factors affecting the uptake of EBPs can inform local-level interventions that encourage EBP adoption.

Reimagining Public Health: Mapping A Path Forward.

The COVID-19 pandemic and other ongoing public health challenges have highlighted deficiencies in the US public health system. The United States is in a unique moment that calls for a transformation that builds on Public Health 3.0 and its focus on social determinants of health and partnerships with diverse sectors while also acknowledging how the pandemic altered the landscape for public health. Based on relevant literature, our experience, and interviews with public health leaders, we describe seven areas of focus within three broad categories to support transformational change. Contextual areas of focus include increasing accountability and addressing politicization and polarization. Topical areas of focus highlight prioritizing climate change and sharpening the focus on equity. Technical areas of focus include advancing data sciences, building the workforce, and enhancing communication capacity. A transformed public health system will depend highly on leadership, funding incentives, and both bottom-up and top-down approaches. A broad effort is needed by public health agencies, governments, and academia to accelerate the transition to a next phase for public health.

Closing the gap: advancing implementation science through training and capacity building.

In their article on "Navigating the Field of Implementation Science Towards Maturity: Challenges and Opportunities," Chambers and Emmons describe the rapid growth of implementation science along with remaining challenges. A significant gap remains in training and capacity building. Formats for capacity building include university degree programs, summer training institutes, workshops, and conferences. In this letter, we describe and amplify on five key areas, including the need to (1) identify advanced competencies, (2) increase the volume and reach of trainings, (3) sustain trainings, (4) build equity focused trainings, and (5) develop global capacity. We hope that the areas we highlight will aid in addressing several key challenges to prioritize in future efforts to build greater capacity in implementation science.

Designing for dissemination among public health and clinical practitioners in the USA.

Introduction: The slow adoption of evidence-based interventions reflects gaps in effective dissemination of research evidence. Existing studies examining designing for dissemination (D4D), a process that ensures interventions and implementation strategies consider adopters' contexts, have focused primarily on researchers, with limited perspectives of practitioners. To address these gaps, this study examined D4D practice among public health and clinical practitioners in the USA. Methods: We conducted a cross-sectional study among public health and primary care practitioners in April to June 2022 (analyzed in July 2022 to December 2022). Both groups were recruited through national-level rosters. The survey was informed by previous D4D studies and pretested using cognitive interviewing. Results: Among 577 respondents, 45% were public health and 55% primary care practitioners, with an overall survey response rate of 5.5%. The most commonly ranked sources of research evidence were email announcements for public health practitioners (43.7%) and reading academic journals for clinical practitioners (37.9%). Practitioners used research findings to promote health equity (67%) and evaluate programs/services (66%). A higher proportion of clinical compared to public health practitioners strongly agreed/agreed that within their work setting they had adequate financial resources (36% vs. 23%, p < 0.001) and adequate staffing (36% vs. 24%, p = 0.001) to implement research findings. Only 20% of all practitioners reported having a designated individual or team responsible for finding and disseminating research evidence. Conclusions: Addressing both individual and modifiable barriers, including organizational capacity to access and use research evidence, may better align the efforts of researchers with priorities and resources of practitioners.

Mending the gap: Measurement needs to address policy implementation through a health equity lens.

Policies represent a key opportunity to improve the health outcomes of populations, and if implemented well, can reduce disparities affecting marginalized populations. Many policies are only evaluated on whether they elicit their intended health outcome. However, a lack of understanding regarding if and how they are implemented may hinder the intended impact overall and on addressing health disparities. Implementation science offers an array of frameworks and methodological approaches for assessing policy delivery, yet few examples exist that meaningfully include health equity as a core focus. This commentary describes the importance of equity-informed implementation measurement by providing case examples and implications for assessment. In addition, we highlight examples of emerging work in policy implementation grounded in health equity with suggested steps for moving the field forward. The ultimate goal is to move toward open-access measurement approaches that can be adapted to study implementation of a variety of policies at different stages of implementation, driven by input from marginalized populations and implementation practitioners, to move the needle on addressing health disparities.

This article talks about the need to include health equity as a major focus when understanding if and how policies are being implemented. We talk about gaps in the implementation science field and how equity-informed measurement tools can help to bridge this gap. Finally, we give some examples of efforts in place and where others can add to the growing resources to improve policy delivery.

Leveraging artificial intelligence to advance implementation science: potential opportunities and cautions.

BACKGROUND: The field of implementation science was developed to address the significant time delay between establishing an evidence-based practice and its widespread use. Although implementation science has contributed much toward bridging this gap, the evidence-to-practice chasm remains a challenge. There are some key aspects of implementation science in which advances are needed, including speed and assessing causality and mechanisms. The increasing availability of artificial intelligence applications offers opportunities to help address specific issues faced by the field of implementation science and expand its methods. MAIN TEXT: This paper discusses the many ways artificial intelligence can address key challenges in applying implementation science methods while also considering potential pitfalls to the use of artificial intelligence. We answer the questions of "why" the field of implementation science should consider artificial intelligence, for "what" (the purpose and methods), and the "what" (consequences and challenges). We describe specific ways artificial intelligence can address implementation science challenges related to (1) speed, (2) sustainability, (3) equity, (4) generalizability, (5) assessing context and context-outcome relationships, and (6) assessing causality and mechanisms. Examples are provided from global health systems, public health, and precision health that illustrate both potential advantages and hazards of integrating artificial intelligence applications into implementation science methods. We conclude by providing recommendations and resources for implementation researchers and practitioners to leverage artificial intelligence in their work responsibly. CONCLUSIONS: Artificial intelligence holds promise to advance implementation science methods ("why") and accelerate its goals of closing the evidence-to-practice gap ("purpose"). However, evaluation of artificial intelligence's potential unintended consequences must be considered and proactively monitored. Given the technical nature of artificial intelligence applications as well as their potential impact on the field, transdisciplinary collaboration is needed and may suggest the need for a subset of implementation scientists cross-trained in both fields to ensure artificial intelligence is used optimally and ethically.

Breaking Barriers: An Innovative Tool to Assess the National and City-Level Physical Activity Policy Development to Practice Disconnect.

BACKGROUND: Population-level physical activity increases are improbable without intersectoral collaboration across government levels and sectors to develop and implement physical activity promotion policies. This study aims to provide information about the development of the Interaction between National and Local Government Levels in Development and Implementation of Physical Activity Policies Tool (INTEGRATE PA-Pol). A framework was created to examine the development and implementation of national and subnational physical activity policies and the (mis)alignment between government levels. METHODS: The work was conducted in 3 phases: (1) a scoping review was carried out to identify local government physical activity promotion policies and instruments for assessing them, (2) an expert group designed 6 questionnaires, and (3) cognitive response testing was employed for validity testing and item modification with a panel of research and policy experts. RESULTS: The INTEGRATE PA-Pol Tool consists of 6 questionnaires assessing how national and subnational governments collaborate to develop and implement physical activity promotion policies. CONCLUSION: This tool can assist in better understanding the development and implementation of a public policy monitoring system that will allow for benchmarking and priority setting to comprehend how physical activity promotion policies are designed and executed.

The Impact of Behavior Change Counseling Delivered via a Digital Health Tool Versus Routine Care Among Adolescents With Obesity: Pilot Randomized Feasibility Study.

BACKGROUND: Youth overweight and obesity is a public health crisis and increases the risk of poor cardiovascular health (CVH) and chronic disease. Health care providers play a key role in weight management, yet few tools exist to support providers in delivering tailored evidence-based behavior change interventions to patients. OBJECTIVE: The goal of this pilot randomized feasibility study was to determine the feasibility of implementing the Patient-Centered Real-Time Intervention (PREVENT) tool in clinical settings, generate implementation data to inform scale-up, and gather preliminary effectiveness data. METHODS: A pilot randomized clinical trial was conducted to examine the feasibility, implementation, and preliminary impact of PREVENT on patient knowledge, motivation, behaviors, and CVH outcomes. The study took place in a multidisciplinary obesity management clinic at a children's hospital within an academic medical center. A total of 36 patients aged 12 to 18 years were randomized to use PREVENT during their routine visit (n=18, 50%) or usual care control (n=18, 50%). PREVENT is a digital health tool designed for use by providers to engage patients in behavior change education and goal setting and provides resources to support change. Patient electronic health record and self-report behavior data were collected at baseline and 3 months after the intervention. Implementation data were collected via PREVENT, direct observation, surveys, and interviews. We conducted quantitative, qualitative, and mixed methods analyses to evaluate pretest-posttest patient changes and implementation data. RESULTS: PREVENT was feasible, acceptable, easy to understand, and helpful to patients. Although not statistically significant, only PREVENT patients increased their motivation to change their behaviors as well as their knowledge of ways to improve heart health and of resources. Compared to the control group, PREVENT patients significantly improved their overall CVH and blood pressure (P<.05). CONCLUSIONS: Digital tools can support the delivery of behavior change counseling in clinical settings to increase knowledge and motivate patients to change their behaviors. An appropriately powered trial is necessary to determine the impact of PREVENT on CVH behaviors and outcomes. TRIAL REGISTRATION: ClinicalTrials.gov NCT06121193; https://www.clinicaltrials.gov/study/NCT06121193.

Action planning for building public health program sustainability: results from a group-randomized trial.

BACKGROUND: Public health programs are charged with implementing evidence-based interventions to support public health improvement; however, to achieve long-term population-based benefits, these interventions must be sustained. Empirical evidence suggests that program sustainability can be improved through training and technical assistance, but few resources are available to support public health programs in building capacity for sustainability. METHODS: This study sought to build capacity for sustainability among state tobacco control programs through a multiyear, group-randomized trial that developed, tested, and evaluated a novel Program Sustainability Action Planning Model and Training Curricula. Using Kolb's experiential learning theory, we developed this action-oriented training model to address the program-related domains proven to impact capacity for sustainability as outlined in the Program Sustainability Framework. We evaluated the intervention using a longitudinal mixed-effects model using Program Sustainability Assessment (PSAT) scores from three time points. The main predictors in our model included group (control vs intervention) and type of dosage (active and passive). Covariates included state-level American Lung Association Score (proxy for tobacco control policy environment) and percent of CDC-recommended funding (proxy for program resources). RESULTS: Twenty-three of the 24 state tobacco control programs were included in the analyses: 11 received the training intervention and 12 were control. Results of the longitudinal mixed-effects linear regression model, where the annual PSAT score was the outcome, showed that states in the intervention condition reported significantly higher PSAT scores. The effects of CDC-recommended funding and American Lung Association smoke-free scores (proxy for policy environment) were small but statistically significant. CONCLUSION: This study found that the Program Sustainability Action Planning Model and Training Curricula was effective in building capacity for sustainability. The training was most beneficial for programs that had made less policy progress than others, implying that tailored training may be most appropriate for programs possibly struggling to make progress. Finally, while funding had a small, statistically significant effect on our model, it virtually made no difference for the average program in our study. This suggests that other factors may be more or equally important as the level of funding a program receives. CLINICALTRIALS: gov, NCT03598114. Registered on July 26, 2018.

Effectively communicating with local policymakers: a randomized trial of policy brief dissemination to address obesity.

Introduction: Evidence-based policies are a powerful tool for impacting health and addressing obesity. Effectively communicating evidence to policymakers is critical to ensure evidence is incorporated into policies. While all public health is local, limited knowledge exists regarding effective approaches for improving local policymakers' uptake of evidence-based policies. Methods: Local policymakers were randomized to view one of four versions of a policy brief (usual care, narrative, risk-framing, and narrative/risk-framing combination). They then answered a brief survey including questions about their impressions of the brief, their likelihood of using it, and how they determine legislative priorities. Results: Responses from 331 participants indicated that a majority rated local data (92%), constituent needs/opinions (92%), and cost-effectiveness data (89%) as important or very important in determining what issues they work on. The majority of respondents agreed or strongly agreed that briefs were understandable (87%), believable (77%), and held their attention (74%) with no brief version rated significantly higher than the others. Across the four types of briefs, 42% indicated they were likely to use the brief. Logistic regression models showed that those indicating that local data were important in determining what they work on were over seven times more likely to use the policy brief than those indicating that local data were less important in determining what they work on (aOR = 7.39, 95% CI = 1.86,52.57). Discussion: Among local policymakers in this study there was no dominant format or type of policy brief; all brief types were rated similarly highly. This highlights the importance of carefully crafting clear, succinct, credible, and understandable policy briefs, using different formats depending on communication objectives. Participants indicated a strong preference for receiving materials incorporating local data. To ensure maximum effect, every effort should be made to include data relevant to a policymaker's local area in policy communications.

Supporting Teams with Designing for Dissemination and Sustainability: the Design, Development, and Usability of a Digital Interactive Platform.

Background: The use of Designing for Dissemination and Sustainability (D4DS) principles and methods can support the development of research products (interventions, tools, findings) to match well with the needs and context of the intended audience and setting. D4DS principles and methods are not well-known or used during clinical and public health research; research teams would benefit from applying D4DS. This paper presents the development of a new digital platform for teams to learn and apply a D4DS process to their work. Methods: A user-centered design (UCD) approach engaged users (n=14) and an expert panel (n=6) in an iterative design process from discovery to prototyping and testing. We led five design sessions using Zoom and Figma software over a 5-month period. Users (71% academics; 29% practitioners) participated in at least 2 sessions. Following design sessions, feedback from users were summarized and discussed to generate design decisions. A prototype was then built and heuristically tested with 11 users who were asked to complete multiple tasks within the platform while verbalizing their decision-making using the 'think aloud' procedure. The System Usability Scale (SUS) was administered at the end of each testing session. After refinements to the platform were made, usability was reassessed with 7 of 11 same users to examine changes. Results: The interactive digital platform (the D4DS Planner) has two main components: 1) the Education Hub (e.g., searchable platform with literature, videos, websites) and 2) the Action Planner. The Action Planner includes 7 interactive steps that walk users through a set of activities to generate a downloadable D4DS action plan for their project. Participants reported that the prototype tool was moderately usable (SUS=66) but improved following refinements (SUS=71). Conclusions: This is a first of its kind tool that supports research teams in learning about and explicitly applying D4DS to their work. The use of this publicly available tool may increase the adoption, impact, and sustainment of a wide range of research products. The use of UCD yielded a tool that is easy to use. The future use and impact of this tool will be evaluated, and the tool will continue to be refined and improved.

Parks, Trails, and Greenways for Physical Activity: A Community Guide Systematic Economic Review.

INTRODUCTION: This systematic economic review examined the cost-benefit and cost-effectiveness of park, trail, and greenway infrastructure interventions to increase physical activity or infrastructure use. METHODS: The search period covered the date of inception of publications databases through February 2022. Inclusion was limited to studies that reported cost-benefit or cost-effectiveness outcomes and were based in the U.S. and other high-income countries. Analyses were conducted from March 2022 through December 2022. All monetary values reported are in 2021 U.S. dollars. RESULTS: The search yielded 1 study based in the U.S. and 7 based in other high-income countries, with 1 reporting cost-effectiveness and 7 reporting cost-benefit outcomes. The cost-effectiveness study based in the United Kingdom reported $23,254 per disability-adjusted life year averted. The median benefit-to-cost ratio was 3.1 (interquartile interval=2.9-3.9) on the basis of 7 studies. DISCUSSION: The evidence shows that economic benefits exceed the intervention cost of park, trail, and greenway infrastructure. Given large differences in the size of infrastructure, intervention costs and economic benefits varied substantially across studies. There was insufficient number of studies to determine the cost-effectiveness of these interventions.

Developing a research agenda for promoting physical activity in Brazil through environmental and policy change / Diseño de un programa de investigación para promocionar la actividad física en el Brasil mediante cambios ambientales y de políticas

Objective. To identify the highest priorities for research on environmental and policy changes for promoting physical activity (PA) in Brazil; to uncover any gaps between researchers' and practitioners' priorities; and to consider which tools, methods, collaborative strategies, and actions could be useful to moving a research agenda forward. Methods. This was a mixed-methods study (qualitative and quantitative) conducted by Project GUIA (Guide for Useful Interventions for Activity in Brazil and Latin America) in February 2010­January 2011. A total of 240 individuals in the PA field (186 practitioners and 54 researchers) were asked to generate research ideas; 82 participants provided 266 original statements from which 52 topics emerged. Participants rated topics by "importance" and "feasibility;" a separate convenience sample of 21 individuals categorized them. Cluster analysis and multidimensional scaling were used to create concept maps and pattern matches. Results. Five distinct clusters emerged from the concept mapping, of which "effectiveness and innovation in PA interventions" was rated most important by both practitioners and researchers. Pattern matching showed a divergence between the groups, especially regarding feasibility, where there was no consensus. Conclusions. The study results provided the basis for a research agenda to advance the understanding of environmental and policy influences on PA promotion in Brazil and Latin America. These results should stimulate future research and, ultimately, contribute to the evidence-base of successful PA strategies in Latin America.

Objetivo. Identificar las máximas prioridades en la investigación sobre cambios ambientales y de políticas para promover la actividad física en el Brasil; descubrir las posibles disparidades en las prioridades de los investigadores y las de los profesionales; y evaluar qué herramientas, métodos, estrategias colaborativas y acciones podrían ser útiles para el avance de un programa de investigación. Métodos. Fue un estudio de metodología mixta (cualitativa y cuantitativa) llevado a cabo por el Proyecto GUIA (Guía para intervenciones útiles de actividades físicas en Brasil y Latinoamérica) entre febrero de 2010 y enero de 2011. Se pidió a 240 personas del campo de la actividad física (186 profesionales y 54 investigadores) que generaran ideas para la investigación; 82 de los participantes aportaron 266 afirmaciones originales de las que surgieron 52 temas. Los participantes puntuaron los temas en función de su "importancia" y "viabilidad" y otra muestra de conveniencia formada por 21 personas los clasificó. Se usó el análisis por conglomerados y el escalonamiento pluridimensional para crear mapas conceptuales y concordancias de patrones. Resultados. Con la elaboración de mapas conceptuales surgieron cinco conglomerados diferenciados y, de ellos, el que tanto los profesionales como los investigadores consideraron más importante fue "eficacia e innovación en las intervenciones de actividad física". La concordancia de patrones indicó una divergencia entre los grupos, especialmente con respecto a la viabilidad, sobre la que no hubo consenso. Conclusiones. Los resultados del estudio sirvieron de base para un programa de investigación con el que avanzar en la comprensión de la influencia que el ambiente y las políticas ejercen sobre la promoción de la actividad física en el Brasil y en América Latina. Estos resultados deben fomentar la futura investigación y, en último término, aumentar la base de evidencia sobre estrategias fructíferas de actividad física en América Latina