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Ray M. Merrill

altitude), as well as urban residency, poverty, tobacco smoking, and obesity, have been associated with physical activity. The influence of these variables on physical activity may be direct or indirect. Associations may also be modified by other variables such as gender. A direct effect of air temperature

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Sandra E. Echeverria, Amiee Luan Kang, Carmen R. Isasi, Janice Johnson-Dias and Dula Pacquiao

Background:

Neighborhoods can be an important feature of the built environment influencing physical activity; however, neighborhood poverty and violence may pose significant barriers for youth physical activity. We conducted a community survey of 107 households with youth 3–12 years of age in select neighborhoods of the city of Newark, New Jersey, a highly impoverished and racially/ethnically segregated city of the United States.

Results:

The majority of sampled households did not have access to a park, and nearly 60% of youth were not engaged in a team or organized physical activity program. Hearing gunshots and seeing drug deals in the neighborhood were reported by 74% and 56%, respectively, of study participants. In adjusted regression models, a 1-unit increase in self-reported neighborhood safety was associated with perceptions that parks were safe for youth to use (OR = 1.7, CI = 1.3, 2.3) and increased odds of youth using parks (OR = 1.3, CI = 1.0, 1.6). Self-reported neighborhood violence was marginally associated with lower levels of Metabolic Equivalent (MET)-min/week of moderate PA (β = –54.25, P = .05).

Conclusion:

To ensure national goals of increased physical activity and use of outdoor spaces, addressing the neighborhood contexts under which the most vulnerable of our youth live will be required.

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Deborah A. Cohen, Bing Han, Sujeong Park, Stephanie Williamson and Kathryn P. Derose

were taken from surveys that addressed park use and physical activity from a larger randomized trial in the City of Los Angeles intended to promote physical activity in low-income neighborhoods ( Cohen et al., 2017 ). We defined low-income as the percentage of households in poverty above the city

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Stephanie J. Hanrahan

People who live in the villas (i.e., slums) of Buenos Aires are confronted with poverty, poor and dangerous living conditions, and discrimination. Ten weeks were spent in the villas delivering a program designed to enhance life satisfaction and self-worth through games and the development of mental skills. The purpose of this paper is not to report on the content or the effectiveness of the program, but rather to explore the variables within Argentina and the villas as well as my own cultural biases that may have influenced the delivery of a psychological intervention program. Argentine factors include a high prevalence of psychologists and a psychoanalytic focus. Characteristics of the villas include environmental factors (e.g., transportation issues, sanitation), logistical issues (e.g., venues, access to writing implements), and psychological matters (e.g., hopelessness, different perceptions of confidence). Practitioner concerns included limited familiarity with life in the villas and having values that might be different from those of the participants. The discussion includes recommendations for others who are considering working in similar cultural and contextual situations.

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Chelsea L. Kracht, Elizabeth K. Webster and Amanda E. Staiano

whether these sociodemographic differences in individual guidelines translate into differences in meeting the 24-Hour Movement Guidelines. Therefore, the purpose of this investigation was to assess sociodemographic differences (ie, age, sex, race, poverty level, and weight status) in meeting the 24-Hour

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Chia-Yuan Yu, Ayoung Woo, Christopher Hawkins and Sara Iman

residential segregation. Racial residential segregation is widely known as a factor that negatively affects the socioeconomic well-being of segregated minority populations, especially African Americans. 3 Segregation concentrates poverty in areas with substandard housing, unsafe living environments, low

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Christoph Buck, Anca Bolbos and Sven Schneider

-term unemployed inhabitants among all those unemployed, • Percentage of the total population who were receiving state support payments, and • Poverty indicator (jobseekers under 65 y of age who were receiving state support payments, as a percentage of all those under 65). The last figure is considered to be a

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Marit L. Bovbjerg, Anna Maria Siega-Riz, Kelly R. Evenson and William Goodnight

Background:

Previous studies report conflicting results regarding a possible association between maternal physical activity (PA) and cesarean delivery.

Methods:

Seven-day PA recalls were collected by telephone from pregnant women (n = 1205) from North Carolina, without prior cesarean, during 2 time windows: 17 to 22 weeks and 27 to 30 weeks completed gestation. PA was treated as a continuous, nonlinear variable in binomial regressions (log-link function); models controlled for primiparity, maternal contraindications to exercise, preeclampsia, pregravid BMI, and percent poverty. We examined both total PA and moderate-tovigorous PA (MVPA) at each time. Outcomes data came from medical records.

Results:

The dose-response curves between PA or MVPA and cesarean risk at 17 to 22 weeks followed an inverse J-shape, but at 27 to 30 weeks the curves reversed and were J-shaped. However, only (total) PA at 27 to 30 weeks was strongly associated with cesarean risk; this association was attenuated when women reporting large volumes of PA (> 97.5 percentile) were excluded.

Conclusion:

We did not find evidence of an association between physical activity and cesarean birth. We did, however, find evidence that associations between PA and risk of cesarean may be nonlinear and dependent on gestational age at time of exposure, limiting the accuracy of analyses that collapse maternal PA into categories.

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Stephanie B. Jilcott Pitts, Michael B. Edwards, Justin B. Moore, Kindal A. Shores, Katrina Drowatzky DuBose and David McGranahan

Background:

Little is known about the associations between natural amenities, recreation facility density, and obesity, at a national level. Therefore, the purpose of this paper was to examine associations between county-level natural amenities, density of recreation facilities, and obesity prevalence among United States counties.

Methods:

Data were obtained from a compilation of sources within the United States Department of Agriculture Economic Research Service Food Environment Atlas. Independent variables of interest were the natural amenities scale and recreation facilities per capita. The dependent variable was county-level obesity prevalence. Potential covariates included a measure of county-level percent Black residents, percent Hispanic residents, median age, and median household income. All models were stratified by population loss, persistent poverty, and metro status. Multilevel linear regression models were used to examine the association between obesity and natural amenities and recreation facilities, with “state” as a random effects second level variable.

Results:

There were statistically significant negative associations between percent obesity and 1) natural amenities and 2) recreation facilities per capita.

Conclusions:

Future research should examine environmental and policy changes to increase recreation facilities and enhance accessible natural amenities to decrease obesity rates.

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Hyo Lee, Bradley J. Cardinal and Paul D. Loprinzi

Background:

Socioeconomic status (SES) and acculturation are potential contributors of adolescent physical activity disparity among ethnic groups in the U.S. However, studies relying on self-report physical activity measures have reported inconsistent findings regarding sociocultural predictors of physical activity. Therefore, the current study examined the main and interactive effects of SES and acculturation on accelerometer-measured moderate-to-vigorous intensity physical activity (MVPA) among Mexican American adolescents.

Methods:

The National Health and Nutrition Examination Survey 2003–2004 was analyzed. Samples of 153 and 169 Mexican American boys and girls, respectively, were analyzed. SES was indicated by poverty-to-income ratio (PIR); and acculturation was measured by 5-item English preference scales and adolescent and parental country of birth. Regression models were tested separately for boys and girls.

Results:

U.S.-born boys compared with immigrants did more MVPA (β = .48, P < .01). On the contrary, the effect of English preference on MVPA in boys was negative (β = –.05, P < .01) and amplified by higher SES (β = –.02, P < .01). For girls, none of the tested variables were significant.

Conclusions:

Higher SES was a risk factor for physical inactivity in Mexican American adolescents, by a moderating mechanism. In addition, physical activity promotion efforts need to consider English speaking and immigrant Mexican American adolescent boys as a target population.