Effect of m-Health-Based Interventions on Blood Pressure: An Updated Systematic Review with Meta-Analysis.

Background: In recent years, the integration of mobile health (m-Health) interventions has garnered increasing attention as a potential means to improve blood pressure (BP) management in adults. This updated systematic review with meta-analysis aimed to identify the effect of m-Health-based interventions on BP in adults and to evaluate the effect of m-Health on BP according to the characteristics of subjects, interventions, and countries. Methods: The search was carried out in PubMed, Embase, ResearchGate, and Cochrane databases in January 2022. Study selection and data extraction were performed by two independent reviewers. For analysis, random effects models were used with a confidence interval (CI) of 95% and p < 0.05. Results: Fifty studies were included in this review and in the meta-analysis. Interventions with m-Health reduced systolic BP in 3.5 mmHg (95% CI -4.3; -2.7; p < 0.001; I2 = 85.8%) and diastolic BP in 1.8 mmHg (95% CI -2.3; -1.4; p < 0.001; I2 = 78.9%) compared to usual care. The effects of m-Health interventions on BP were more evident in men and in older adults, in interventions lasting 6-8 weeks, with medication reminders, with the possibility of insertion of BP values (p < 0.05). Conclusion: The results of this study support the effectiveness of m-Health in reducing BP when compared to standard care. However, these effects are dependent on the characteristics of the subjects and interventions. Given the substantial heterogeneity among the results of this systematic review with meta-analysis, its interpretation should be cautious. Future research on this topic is warranted.

How do the year's seasons and specific weather indices affect physical activity and the patterns of use of public open spaces in the Brazilian context?

BACKGROUND: Public open spaces (POS) can offer various resources to promote visitation and engagement in moderate-to-vigorous physical activity (MVPA). However, the influence of seasonal variations and specific meteorological conditions on this relationship remains unclear. Thus, this study aims to investigate the effect of seasonal variations and specific meteorological elements on different days of the week and times of day on POS use and POS-based MVPA in the Brazilian context. METHODS: In 2018, repeated measurements carried out in Southern Brazil used a systematic observation to identify the presence of users in the POS and their engagement in MVPA. The meteorological elements (temperature, thermal sensation, and relative humidity), as well as seasonality (summer, autumn, winter, and spring), were aggregated into the observations. RESULTS: A total of 19,712 systematic observations were conducted across nine POS. During these observations, a total of 59,354 users were identified. Out of theses, 39,153 (66.0%) were engaged in POS-based MVPA. The presence of users was found to be more frequent during the spring season (38.7%) and on weekends (ranging from 37.6 to 50.1% across seasons). Additionally, user presence was higher in the late afternoon (ranging from 36.4 to 58.2% across seasons) and at higher temperatures with lower relative humidity (p-value < 0.001). Regarding POS-based MVPA, it was more frequent during the winter season (36.4%) and on weekdays (ranging from 73.2 to 79.9% across seasons). Similarly, MVPA was higher in the late afternoon (ranging from 58.3 to 67.5% across seasons) and at lower temperatures and thermal sensations (p-value < 0.005). CONCLUSIONS: Higher presence of users in POS, as well as their visiting, to practice POS-based MVPA, depending on the seasons and specific meteorological elements. By creating infrastructure and conducive conditions, cities can encourage individuals to adopt more active and healthy behaviors. These findings emphasize the importance of designing urban spaces that promote physical activity and contribute to overall well-being.

Is Walk Score Associated With Physical Activity and Screen Time in Brazilian Older Adults?

This study aimed to examine the relationship between Walk Score index with walking to commuting, moderate-to-vigorous physical activity, and screen time in older adults. Georeferenced addresses were entered into the Walk Score platform. Walking to commute and moderate-to-vigorous physical activity were assessed using the International Physical Activity Questionnaire and categorized according to the World Health Organization recommendations. Screen time was analyzed through self-reported time watching television/being on the computer. We used binary logistic regression to estimate the association between variables. Older adults who lived in places with higher Walk Score had a higher prevalence of walking to commuting (odds ratio = 1.73; 95% confidence interval [1.18, 2.55]) and engaging in moderate-to-vigorous physical activity (odds ratio = 1.76; 95% confidence interval [1.05, 2.98]). A relationship also was observed between higher Walk Score and more time in screen time (odds ratio = 1.67; 95% confidence interval [1.19, 2.34]). The results showed that residing in a more walkable neighborhood increased the chances of the older adults spending 3 hr or more in front of a screen.

Can internet use reduce the incidence of cognitive impairment? Analysis of the EpiFloripa Aging Cohort Study (2009-2019).

This study aims to estimate the effect of internet use on the incidence of cognitive impairment in older adults. Data are from the EpiFloripa Aging Cohort Study which has been following a population-based sample of older adults (60+) residing in Florianópolis, southern Brazil, for ten years. The outcome was the incidence of cognitive decline in follow-up waves measured by the Mini-Mental State Examination using cutoff points according to education. The exposure was internet use according to wave (yes/no). We excluded individuals with cognitive impairment from Wave 1 (n = 453). We used a longitudinal analysis model (Generalized Estimating Equations) to estimate incidence rate ratios (IRR) with 95% confidence intervals. We estimated the risk of cognitive impairment in Wave 2 or Wave 3 according to internet use in the previous wave. The incidence of cognitive impairment was 13.4% in Wave 2 and 13.3% in Wave 3. Despite the aging of this cohort, the prevalence of internet users increased from 26.4% in Wave 1 to 32.8% in Wave 2 and 46.8% in Wave 3. The risk of cognitive impairment in Wave 2 or Wave 3 was 70% lower for older adults who used the internet in the previous wave, adjusted for sex, age, years of education, household income, and self-reported comorbidities (IRR = 0.30; 95% CI: 0.15-0.61; p = 0.001). Internet use was associated with a decline in the incidence of cognitive impairment among older adults living in the urban areas of southern Brazil after a period of ten years.

Associations of Mutually Exclusive Categories of Physical Activity and Sedentary Time With Metabolic Syndrome in Older Adults: An Isotemporal Substitution Approach.

The aim of this study was to examine, theoretically, how reallocating time between the intensity of mutually exclusive categories of physical activity and sedentary behavior time is associated with metabolic syndrome. Four hundred and six older adults (61.6% women) from the second wave of the EpiFloripa Aging Cohort Study were included in the study (mean age 71.7 ± 5.9 years). Isotemporal substitution analysis showed a decrease of 35% (odds ratio: 0.65; 95% confidence interval [0.45, 0.96]) in the risk for metabolic syndrome when replacing 30 min/day of sedentary behavior with an equivalent amount of moderate to vigorous physical activity. Furthermore, it has been observed that older adults classified as low sedentary behavior and physically active were 57% less likely to have metabolic syndrome than participants classified as high sedentary and physically inactive (odds ratio: 0.43; 95% confidence interval [0.19, 0.97]). This study highlights the importance of behavioral categories that may emerge concerning the interrelationships of physical activity and health in older adults, having important implications for future health intervention programs.

Changes in Health-Related Quality of Life and Physical Activity Among Older Adults in the First-Wave COVID-19 Outbreak: A Longitudinal Analysis.

The current study aimed to follow the effects of social/physical distancing strategies on health-related daily physical activity and quality of life among older adults during the COVID-19 pandemic. Seventy-two older adults who were enrolled in a University-Community program in March 2020 (age = 66.8 ± 4.82 years, ♀59) answered five phone-based surveys up to 120 days after the COVID-19 outbreak (from April to August 2020). The Short Form 6D and international physical activity (short version) questionnaires were applied. A significant reduction was observed in daily physical activity levels, metabolic equivalent of task, and health-related quality of life scores as well as an increase in sitting time during the week and on weekend days (all p < .01). The authors noted differences in lifestyle conditions at the beginning of the social/physical distancing in the community assessed (p < .01). Health vulnerabilities among older adults have been emphasized during the COVID-19 outbreak, impacting daily physical activity and health-related quality of life.

How much time in sedentary behavior is associated with probable sarcopenia in older adults?

Sedentary activities, such as watching television and using the computer, are frequent conditions in older adults and can be associated with sarcopenia. The objectives of this study were: (a) to establish sedentary behavior (SB) cutoff values for screening probable sarcopenia in community-dwelling older adults and (b) to verify the association between SB and probable sarcopenia according to the established cutoff point. This was a cross-sectional study including 1,165 community residents in Florianopolis/SC. SB was assessed using the International Physical Activity Questionnaire. The outcome was probable sarcopenia (assessed by time ≥ 15 s in the Five times sit-to-stand test). The cut-off points found for SB were time > 120 min/day [AUC: 0.54 (95%CI: 0.51; 0.57)] watching TV or video/DVD and ≤ 20 min/day [AUC: 0.59 (95%CI: 0.56;0.62)] using computer/internet. Older adults with SB had 1.30 (95% CI: 1.01; 1.66) and 1.46 (95% CI: 1.08; 1.96) greater chances of having sarcopenia, respectively.

Are Changes in Walking for Transportation in Brazilian Older Adults Associated With Attributes of the Neighborhood Environment?

This study aims to examine the association between neighborhood environment attributes and changes in walking for transportation among older adults. Longitudinal analysis was performed considering a population-based study (EpiFloripa Idoso), carried out in 2009-2010 with follow-up in 2013-2014. Changes in walking, obtained with the International Physical Activity Questionnaire during both waves were associated with data from the environment perception, evaluated using individual items from the Neighborhood Environment Walkability Scale (baseline only) performing multinomial logistic regression. A total of 1,162 older adults (65.2% women, mean age = 73.7 years) participated. Those who reported the presence of parks and squares (OR = 2.44, 95% confidence interval [CI; 1.70, 3.51]), sidewalks (OR = 1.66, 95% CI [1.03, 2.70]), crosswalks (OR = 1.69, 95% CI [1.05, 2.72]), illuminated streets (OR = 2.80, 95% CI [1.24, 6.33]), and safety for day walks (OR = 1.93, 95% CI [1.14, 3.24]) were more likely to remain active or become active when commuting (≥150 min/week). Older adults are more active in neighborhoods that present more favorable attributes regarding walking for transportation.

Influence of instrumental activities of daily living on the cognitive impairment: EpiFloripa study.

Objective: To investigate the influence of instrumental activities of daily living (IADL) on cognitive impairment of the older adults' population in southern Brazil.Methods: A longitudinal, population-based and home-based study that evaluates the older adults population (60 years or older) living in the city of Florianópolis, Southern Brazil. The sample at the baseline (2009/2010) was composed by 1,702 older adults. Cognitive impairment and IADL disability were investigated. A multilevel logistic model was used, in which the analyzed variables were included as the first level and time (baseline and follow-up interviews) as the second level variable.Results: The prevalence of cognitive impairment increased from baseline to follow-up. There was an increase in the chance of the older adults presenting cognitive impairment among those with low (OR: 1.5, 95% CI: 1.0-2.3) and moderate/severe disability (OR: 3.2, 95% CI: 2.1-4.9). Adjusted probability of presenting the outcome almost doubled among those with mild disability, and were nearly four times higher among the older adults with moderate/severe disability when compared to those without disability.Conclusions: IADL disability can be considered an indicator of risk for clinical diagnosis of cognitive impairment. Its evaluation and follow-up are of paramount importance, especially in the older adults with mild disability, in order to avoid the progression of functional and cognitive impairment over time.

Is the availability of open public spaces associated with leisure-time physical activity in Brazilian adults?

This study aims to analyse the association between perceived presence of public spaces near residences and practice of physical activity during leisure time by adults in the state capitals of Brazil, based on sociodemographic characteristics. Participants were individuals aged ≥18 years living in the 27 state capitals of Brazil (n = 52 929, 53.9% female) who responded to a national survey called VIGITEL in 2013. Physical activity during leisure time (≥1 time/week), perception of space, population and sociodemographic variables (sex, age, years of study and geographic region) were self-reported. The adjusted binary logistic regression analysis was used. Among adults, the prevalence of physical activity during leisure was 45.1% (95% CI [44.2; 46.0]), and 71.1% (95% CI [70.2, 71.8]) perceived public space near their residence. A direct association between perceiving public space and physical activity ([OR] = 1.43; 95% CI [1.32; 1.55]) was observed. No significant difference was observed in the population groups (men and women, younger and older adults, and those with more and fewer years of study). Thus, even with the possible regional differences in Brazilian state capitals, the presence of public spaces increases the practice of physical activity during leisure time, independent of sociodemographic variables.

Perceived neighborhood environmental characteristics and different types of physical activity among Brazilian adolescents.

Little is known about the association between environmental characteristics and types of physical activity in adolescents in a Latin American context. The aim of this study was to examine the association between perceived neighborhood environmental characteristics and different types of physical activity in 2,874 adolescents from Joao Pessoa, Paraiba State, Northeastern Brazil. The types of activity measured by questionnaire (≥10 min/day) included sports, physical exercises, active commuting and recreational activities. Neighborhood characteristics were measured by a 15-item scale. Multilevel analyses showed that adolescents who reported "having places they liked to go to" (OR = 1.41; 95%CI: 1.10-1.79) and "places with opportunities to practice" (OR = 1.29; 95%CI: 1.01-1.65) were more likely to play sports. "Seeing interesting things while walking" (OR = 1.24; 95%CI: 1.01-1.53) and "Seeing other adolescents engaged in physical activity" (OR = 1.47; 95%CI: 1,05-2,06) were associated with exercises. "Seeing other adolescents engaged in physical activity" (OR = 1.47; 95%CI: 1.18-1.82), "the neighborhood is not violent" (OR = 1.29; 95%CI: 1.04-1.60) and "having places they like to go to" (OR = 1.59; 95%CI: 1.13-2.25) were positively associated and "places with opportunities to practice" (OR = 0.79; 95%CI: 0.63-0.98) inversely related to active commuting. "Seeing other adolescents engaged in physical activities" (OR = 1.31; 95%CI: 1.05-1.63) and "seeing interesting things while walking" (OR = 1.26; 95%CI: 1.02-1.56) were associated with recreational activities. Neighborhood environmental characteristics associated with the physical activity vary with the type of practices adopted by adolescents.

The Accuracy of Anthropometric Equations to Assess Body Fat in Adults with Down Syndrome.

BACKGROUND: The aim of this study was to verify the accuracy of anthropometric equations to estimate the body density (BD) of adults with Down syndrome (DS), and propose new regression equations. MATERIALS AND METHODS: Twenty-one males (30.5 ± 9.4 years) and 17 females (27.3 ± 7.7 years) with DS participated in this study. The reference method for BD was air displacement plethysmography (ADP). Also, the BD was estimated by anthropometric equations. The body fat percentage (BF %) was estimated by the Siri equation. RESULTS: For females, the Durnin and Womersley equation showed no difference from the ADP, but a trend of underestimation was observed. For males, all equations were significantly different for the BF % from ADP. The equations developed in this study showed a high correlation and acceptable agreement with BF % from ADP in both genders. CONCLUSION: All equations are not valid for DS adults. The new equations developed here were accurate in estimating the BF %.

Characteristics and counseling strategies for physical activity used by primary health care professionals. / Características e estratégias de aconselhamento para atividade física utilizadas por profissionais da atenção primária à saúde.

This study aim to describe the characteristics and strategies of counseling for physical activity used by Primary Health Care (PHC) professionals. A survey was carried out with 587 (85.4% women) health professionals who work in PHC in Florianopolis, in the state of Santa Catarina, southern Brazil. Counseling carried out in the last 12 months was considered. Operational aspects related to counseling practices and strategies used for counseling were evaluated. The frequency of physical activity guidance was 86.2% (95%CI = 83.2-88.8%). Counseling was characterized as a brief practice, carried out in individual consultations, aimed at adults and the older adults and people with morbidities. The most used strategy was to guide users to participate in physical activity groups at the Health Center (89.5%) and in relation to the 5As method, giving some "advice" was the most used strategy (99.0%) and the least used. used was to follow strategies (22.6%). Counseling for physical activity has been based on a brief practice, carried out in individual consultations and focused on people with morbidities and on adults and the elderly. The strategies used do not seem to cover the full care of the advised users.

O estudo buscou descrever as características e estratégias de aconselhamento para atividade física utilizadas por profissionais da atenção primária à saúde (APS). Foi realizada uma pesquisa com 587 profissionais de saúde (85,4% mulheres) que atuam na APS de Florianópolis, no estado de Santa Catarina, Sul do Brasil. Foram considerados os aconselhamentos efetuados nos últimos 12 meses, avaliando-se aspectos operacionais relacionados às práticas e estratégias utilizadas. A frequência de orientação de atividade física foi de 86,2% (IC95% = 83,2-88,8%). O aconselhamento se caracterizou como uma prática breve, realizada em consultas individuais, voltadas para adultos e idosos e pessoas com morbidades. A estratégia mais utilizada foi orientar usuários a participarem de grupos de atividade física no Centro de Saúde (89,5%), e em relação ao método 5As, dar algum "conselho" foi a estratégia mais utilizada (99,0%), e a menos utilizada foi seguir estratégias (22,6%). Aconselhamento para atividade física tem sido baseado em uma prática breve, realizada em consultas individuais e focada em pessoas com morbidades e em adultos e idosos. As estratégias utilizadas parecem não abranger o cuidado integral dos usuários aconselhados.

Effectiveness of the 5A Counseling Model-Based Interventions on Physical Activity Indicators in Adults: A Systematic Review.

BACKGROUND: To identify and appraise the effectiveness of the 5A-counseling-model-based interventions on indicators of physical activity in adults. METHODS: A systematic review was conducted from systematic searches in Embase, Lilacs, Pubmed, Scielo, Scopus, Sportdiscus and Web of Science, involving studies published from its inception until May 2022. To avoid potential losses, searches also were made in Google Scholar and in reference lists. The assessment of studies, data extraction, and synthesis were carried out independently by two researchers. RESULTS: Four studies composed the synthesis, which involved people with an average age between 40 and 55 years, most of the samples being women. It was observed that counseling was carried out in conjunction with other strategies, such as drawing up an action plan, sending text messages, and offering educational material. Only one study showed a statistically significant difference between the intervention and control groups in the "daily number of steps" indicator. CONCLUSIONS: Based on available studies, 5A-counseling-model-based interventions did not reflect significant findings in relation to physical activity. However, given the potential of the model, future studies are recommended with a better description of the strategies, as well as a more robust methodology, to strengthen the evidence.

Neighborhood Availability and Use of Food, Physical Activity, and Social Services Facilities in Relation to Overweight and Obesity in Children and Adolescents.

OBJECTIVE: To evaluate the association of a combined measure of availability and use of facilities from the food environment and overweight (including obesity) among schoolchildren, while taking into account the physical activity and social-assistance environments. METHODS: Cross-sectional study with a probabilistic sample of schoolchildren aged 7 to 14 years living in a southern Brazilian city (n = 2026). Multilevel analyses were performed with overweight as outcome and the food environment as main exposure. Models were adjusted for the physical activity and social-assistance environments, as well as individual and other residential neighborhood characteristics. RESULTS: Greater availability of restaurants around the home was associated with higher odds of overweight (odds ratio [OR] = 1.40; 95% CI = 1.06-1.85). Stronger associations were found for schoolchildren reporting to use restaurants (OR = 1.48; 95% CI = 1.15-1.90). This association remained significant after adjusting for the presence of other food retailers. Schoolchildren who had social-assistance facilities around their homes, but reported not to use them, showed consistently higher odds of being overweight (OR = 1.34; 95% CI = 1.01-1.78) as compared to schoolchildren who had these facilities near home and used them. The physical activity environment was not associated with the outcome. CONCLUSIONS: Availability and use of the food and social-assistance environments were significantly associated with overweight (including obesity) among the schoolchildren. Future research should consider the use of environmental facilities in combination to their geographical availability. Our results highlight the need for policies that limit the access to obesogenic food outlets by children and adolescents.

Geocoding processes in cohort studies: methods applied in the EpiFloripa Aging.

OBJECTIVE: To describe the process and epidemiological implications of georeferencing in EpiFloripa Aging samples (2009-2019). METHOD: The EpiFloripa Aging Cohort Study sought to investigate and monitor the living and health conditions of the older adult population (≥ 60) of Florianópolis in three study waves (2009/2010, 2013/2014, 2017/2019). With an automatic geocoding tool, the residential addresses were spatialized, allowing to investigate the effect of the georeferencing sample losses regarding 19 variables, evaluated in the three waves. The influence of different neighborhood definitions (census tracts, Euclidean buffers, and buffers across the street network) was examined in the results of seven variables: area, income, residential density, mixed land use, connectivity, health unit count, and public open space count. Pearson's correlation coefficients were calculated to evaluate the differences between neighborhood definitions according to three variables: contextual income, residential density, and land use diversity. RESULT: The losses imposed by geocoding (6%, n = 240) caused no statistically significant difference between the total sample and the geocoded sample. The analysis of the study variables suggests that the geocoding process may have included a higher proportion of participants with better income, education, and living conditions. The correlation coefficients showed little correspondence between measures calculated by the three neighborhood definitions (r = 0.37-0.54). The statistical difference between the variables calculated by buffers and census tracts highlights limitations in their use in the description of geospatial attributes. CONCLUSION: Despite the challenges related to geocoding, such as inconsistencies in addresses, adequate correction and verification mechanisms provided a high rate of assignment of geographic coordinates, the findings suggest that adopting buffers, favored by geocoding, represents a potential for spatial epidemiological analyses by improving the representation of environmental attributes and the understanding of health outcomes.

Effects of physical training on functional, clinical, morphological, behavioural and psychosocial outcomes in post-COVID-19 infection: COVID-19 and REhabilitation study (CORE-study)-a study protocol for a randomised controlled clinical trial.

BACKGROUND: The COVID-19 pandemic remains ongoing, with a significant number of survivors who have experienced moderate to severe clinical conditions and who have suffered losses of great magnitude, especially in functional capacity, triggering limitations to daily autonomy and quality of life. Among the possibilities of intervention for disease rehabilitation, physical exercise training stands out, which can benefit several health outcomes and favours the adoption of healthier behaviours. Therefore, the aim of the study will be to analyse the effects of physical training on the functional, clinical, morphological, behavioural and psychosocial status in adults and the elderly following COVID-19 infection. METHODS: A randomised controlled clinical trial is to be conducted in parallel, with the experimental group undergoing an intervention involving a multicomponent physical rehabilitation programme, carried out at the Sports Center in partnership with the Academic Hospital of the Federal University of Santa Catarina, in Florianópolis, Brazil. Participants will be adults and the elderly, of both sexes, in a post-COVID-19-infection state, who were hospitalised during the infection. The intervention will have a total duration of 24 weeks and will include a multicomponent physical training programme, which will have gradual progression in frequency, duration and intensity over time. Regarding the outcomes, before, at the 12th and after 24 weeks of intervention, functional (primary outcome = functional index of aerobic capacity), clinical, morphological, behavioural and psychosocial outcomes will be assessed. DISCUSSION: This study will contribute to a greater understanding of the safety, adherence and benefits of physical training in the rehabilitation of post-COVID-19 patients. The results of this study will be disseminated through presentations at congresses, workshops, peer-reviewed publications and local and international conferences, especially with a view to proposing a post-COVID-19 rehabilitation care protocol. TRIAL REGISTRATION: ReBEC, RBR-10y6jhrs . Registered on 22 February 2022. 2015.

Neighborhood safety and physical inactivity in adults from Curitiba, Brazil.

BACKGROUND: Neighborhood safety is one of the environmental aspects that can influence physical activity. We analyzed the association between perceived neighborhood safety and physical inactivity (PI) in adults and examined effect modification according to sociodemographic variables. METHODS: A cross-sectional study was conducted with 1,261 adults (62% women), age 18-69 years from Curitiba, Brazil. RESULTS: The perception of unsafe neighborhood was higher among women, older participants, those classified in the high socioeconomic (SES) group, overweighed and also among those reporting to have PA equipments and children. The association between perception safety of walking during the day and walking for leisure (women PR=1.12 CI95%=1.02-1.22; men PR=0.82 CI95%=0.64-1.05; interaction term PR=1.38 CI95%=1.03-1.83) and safe perception was associated with PI, just in the highest SES group (PR=1.09; CI95%=1.00-1.19; p trend=0.032) when compared with their counterparts (low SES PR=0.99; CI95%=0.90-1.04; p trend=0.785; interaction term PR=1.09; CI95%=1.03-1.15; p trend=0.007). CONCLUSION: The perception of safety in the neighborhood was associated with PI in transport, but this association varies across of sociodemographic variables.

[Projeto ESPAÇOS de Curitiba, Brazil: applicability of mixed research methods and geo-referenced information in studies about physical activity and built environments]. / Projeto ESPAÇOS de Curitiba, Brasil: aplicabilidade de métodos mistos de pesquisa e informações georreferenciadas em estudos sobre atividade física e ambiente construído.

OBJECTIVE: To describe the methods employed to assess the built environment and physical activity (PA) as part of a multicenter international study, and to discuss the challenges faced to obtain the necessary data in the Brazilian context. METHODS: In 2010 a household survey was conducted with adults aged from 20 to 65 years in the city of Curitiba, Brazil. The study involved the used of geo-referenced information to measure walkability in all 2 125 census sectors in Curitiba. Census sectors were categorized by walkability and income, taking into consideration the average income of heads of the family in each sector. Physical activity was assessed by self- report and using an objective measure (accelerometers). RESULTS: Sixteen high walkability and 16 low walkability sectors were studied, with eight high-income and eight low-income sectors in each category. A total of 699 subjects were interviewed and 381 wore accelerometers. The response rate was 66.4% for the interviews and the compliance with accelerometer use was 85.8% (n = 327). CONCLUSIONS: The results show that it is feasible to conduct high-quality studies on physical activity and built environment in the Brazilian context in accordance with international standards.