Examining the Role of Urban Policy, Built Environment, and Physical Activity in Mexico City

Over the past three decades, Latin America has undergone major demographic, lifestyle, and epidemiological transitions. These rapid transitions are relevant contributors to social and health inequities in the region. Physical inactivity is a known risk factor for several adverse health outcomes, including Type 2 diabetes, coronary heart disease, and site-specific cancers (breast, ovarian, endometrial, and colon). Latin America has the highest prevalence of physical inactivity among all global regions, with one in every three Latin Americans being physically inactive. Research exploring the link between urban policies, built environment characteristics, and physical activity has grown over the past two decades. Nevertheless, the available evidence from the region suggests essential differences in the mechanisms through which urban policy and built environments influence population patterns of physical activity relative to what we know for high-income countries (HIC) settings. Latin America comprises low-to-middle-income countries and is home to six megacities, which face unique and complex health and social challenges. However, most of this evidence stems from something other than megacities in the region but from small to mid-sized cities. Additionally, although the available studies have contributed to the literature, there remain several substantial methodological limitations related to research questions, methods, study designs, and frameworks developed for HICs that need to be culturally and contextually appropriate for conducting studies in the region. This study focuses on Mexico City’s metropolitan area, which has over 20 million inhabitants. Through an interdisciplinary urban health lens, this dissertation aims to contribute to generating contextually relevant Research by following the ‘necessity-vs-choice-based models of the physical activity framework.’ the relationship between macro-level factors (urban policy and urban environment) and physical activity patterns in Mexico City, a Latin American megacity, was explored through three independent but interrelated studies. This study contributed to filling research gaps in understanding how macro-level factors influence physical activity in a Latin American megacity. The first study explores the relationship between objectively measured built environment characteristics and accelerometer-based physical activity among adults in Mexico City, finding consistent results with previous studies and moderating effects that have not been previously studied. The second study investigates the impact of two system-level shocks on the ridership patterns of the city\u27s public bicycle-sharing system (Ecobici), highlighting missed opportunities for promoting cycling, especially among women. The last study introduces a tool to assess the physical activity policy misalignment and facilitate the examination of the “policy-to-practice disconnect” between the national and subnational (city) levels across the policy process. A pilot study in Mexico complements this study to test the feasibility and applicability of the tool in this country. Overall, these studies contribute to understanding the urban environment, policies, and active and sustainable transportation in Mexico City

Examining Place-Based Neighborhood Factors in a Multisite Peer-Led Healthy Lifestyle Effectiveness Trial for People with Serious Mental Illness

People with severe mental illness (SMI) experience significantly higher obesity-related comorbidities and premature mortality rates than healthy populations. The physical and social characteristics of neighborhoods where people with SMI reside can play an important role in promoting or hindering healthy eating and physical activity. However, this is seldom considered when designing and testing health behavior interventions for these populations. This study used baseline data from an obesity control trial for low-income, minority people with SMI to demonstrate the utility of assessing neighborhood- and city-level place-based factors within the context of lifestyle interventions. GIS was used to create a zip-code-level social and built environment geodatabase in New York City and Philadelphia, where the trial occurred. Chi-square and t-tests were used to assess differences in the spatial distribution of health-related built and social environment characteristics between and within cities and diet and physical activity outcomes. All types of neighborhood characteristics showed significant environmental differences between and within cities. Several neighborhood characteristics were associated with participants’ baseline healthy eating and physical activity behaviors, emphasizing that place-based factors may moderate lifestyle interventions for SMI patients. Future behavioral interventions targeting place-dependent behaviors should be powered and designed to assess potential moderation by place-based factors

A pathway to prioritizing and delivering healthy and sustainable cities

Creating healthy and sustainable cities should be a global priority. Some cities prioritize 15-minute cities as a planning approach with co-benefits for health, climate change mitigation, equity, and economic recovery from COVID-19. Yet, as our recent Lancet Global Health series on “Urban Design, Transport, and Health” showed, many cities have a long way to go to achieve this vision. This policy guideline summarizes the main findings of the series, which assessed health and sustainability indicators for 25 cities in 19 countries. We then outline steps governments can take to strengthen policy frameworks and deliver more healthy, equitable, and sustainable built environments. The Lancet Global Health series provided clear evidence that cities need to transform urban governance to enable integrated planning for health and sustainability and commit to policy implementation. Evidence-informed indicators should be used to benchmark and monitor progress. Cities need policy frameworks that are comprehensive and consistent with evidence, with measurable policy targets to support implementation and accountability. The series provided evidence-informed thresholds for some key urban design and transport features, which can be embedded as policy targets. Policies and interventions must prioritize identifying and reducing inequities in access to health-supportive environments. Governments should also invest in open data and promote citizen-science programmes, to support indicator development and research for public benefit. We provide tools to replicate our indicators and an invitation to join our 1000 Cities Challenge via the Global Observatory of Healthy and Sustainable Cities

Global, regional, and national trends and patterns in physical activity research since 1950: a systematic review.

BackgroundNational, regional and global scientific production and research capacity for physical activity - PA may contribute to improving public health PA policies and programs. There is an uneven distribution of research productivity by region and country income group, where countries with the highest burden of non-communicable diseases attributable to physical inactivity having low research productivity. A first step towards improving global research capacity is to objectively quantify patterns, trends, and gaps in PA research. This study describes national, regional and global trends and patterns of PA research from 1950 to 2019.MethodsA systematic review using searches in PubMed, SCOPUS and ISI Web of Knowledge databases was conducted in August 2017 and updated between January and May 2020. The review was registered at the PROSPERO database number CRD42017070153. PA publications per 100,000 inhabitants per country was the main variable of interest. Descriptive and time-trend analyses were conducted in STATA version 16.0.ResultsThe search retrieved 555,468 articles of which 75,756 were duplicates, leaving 479,712 eligible articles. After reviewing inclusion and exclusion criteria, 23,860 were eligible for data extraction. Eighty-one percent of countries (n = 176) had at least one PA publication. The overall worldwide publication rate in the PA field was 0.46 articles per 100,000 inhabitants. Europe had the highest rate (1.44 articles per 100,000 inhabitants) and South East Asia had the lowest (0.04 articles per 100,000 inhabitants). A more than a 50-fold difference in publications per 100,000 inhabitants was identified between high and low-income countries. The least productive and poorest regions have rates resembling previous decades of the most productive and the richest.ConclusionThis study showed an increasing number of publications over the last 60 years with a growing number of disciplines and research methods over time. However, striking inequities were revealed and the knowledge gap across geographic regions and by country income groups was substantial over time. The need for regular global surveillance of PA research, particularly in countries with the largest data gaps is clear. A focus on the public health impact and global equity of research will be an important contribution to making the world more active

City planning policies to support health and sustainability: an international comparison of policy indicators for 25 cities

City planning policies influence urban lifestyles, health, and sustainability. We assessed policy frameworks for city planning for 25 cities across 19 lower-middle-income countries, upper-middle-income countries, and high-income countries to identify whether these policies supported the creation of healthy and sustainable cities. We systematically collected policy data for evidence-informed indicators related to integrated city planning, air pollution, destination accessibility, distribution of employment, demand management, design, density, distance to public transport, and transport infrastructure investment. Content analysis identified strengths, limitations, and gaps in policies, allowing us to draw comparisons between cities. We found that despite common policy rhetoric endorsing healthy and sustainable cities, there was a paucity of measurable policy targets in place to achieve these aspirations. Some policies were inconsistent with public health evidence, which sets up barriers to achieving healthy and sustainable urban environments. There is an urgent need to build capacity for health-enhancing city planning policy and governance, particularly in low-income and middle-income countries

City planning policies to support health and sustainability: an international comparison of policy indicators for 25 cities

City planning policies influence urban lifestyles, health, and sustainability. We assessed policy frameworks for city planning for 25 cities across 19 lower-middle-income countries, upper-middle-income countries, and high-income countries to identify whether these policies supported the creation of healthy and sustainable cities. We systematically collected policy data for evidence-informed indicators related to integrated city planning, air pollution, destination accessibility, distribution of employment, demand management, design, density, distance to public transport, and transport infrastructure investment. Content analysis identified strengths, limitations, and gaps in policies, allowing us to draw comparisons between cities. We found that despite common policy rhetoric endorsing healthy and sustainable cities, there was a paucity of measurable policy targets in place to achieve these aspirations. Some policies were inconsistent with public health evidence, which sets up barriers to achieving healthy and sustainable urban environments. There is an urgent need to build capacity for health-enhancing city planning policy and governance, particularly in low-income and middle-income countries