Thursday-Abstracts

Official Journal of the American College of Sports Medicine
rEsuLTs:In K-6 data, moderate to strong correlations were found between OW/OB
and Behavior (0.40), Clinical Care (0.28) and SES (0.37). Significant individual items
included Smoking (0.30), Diet and Exercise (0.26), Alcohol (0.45), Education (0.52),
Employment (0.39), Air Quality (-0.34) and Clinical Quality (0.31). When SES was
controlled the correlations became non-significant. For 7-12 grade, the only factor
that was significantly correlated with OW/OB was SES (0.27). Significant individual
factors included Employment (0.34), Quality of Care (0.24) and Air Quality (-0.31).
When SES was controlled for correlations between OW/OB and Clinical Care (0.24)
and Environment (-0.28) became significant.
CONCLusIONs: County health rankings may provide useful indicators to evaluate
social and environmental factors influencing health outcomes such as obesity.
Monitoring of these factors may help evaluate large-scale policy and environmental
interventions but SES needs to be controlled.
1654 Board #246 May 30, 2:00 PM - 3:30 PM
Obesity-related health risk In asian-subgroups In Canada:
a Cross-sectional analysis
Chris I. Ardern, Jason X. Nie. York University, Toronto, ON,
Canada.
(No relationships reported)
PurPOsE: Obesity-related health risk has been shown to vary across ethnicity and
time-in-country; however, reliance on broad categories of ethnicity in populationbased
surveys have limited epidemiological insight. The purpose of this study was to
therefore examine the association between the World Health Organization’s Asianspecific
cut-offs of overweight (Body Mass Index (BMI) ≥23 kg.m-2) and obesity
(BMI ≥27.5 kg.m-2) with self-reported cardiovascular-related conditions (high blood
pressure, diabetes, heart disease, and ‘at least one’ condition) in Asian-Canadian subgroups
(Chinese, South Asian, Filipino, Southeast Asian, Arab, West Asian, Japanese,
and Korean) who are at elevated risk for cardiometabolic disease.
METhOds: Six cycles of the Canadian Community Health Survey (2001-2009;
N=18,794) were pooled, and weighted to represent the Asian-Canadian population
across 9 years. Multivariable logistic regression, adjusting for demographic and
lifestyle characteristics, was used to estimate the odds of cardiovascular outcomes
across each of eight Asian sub-groups.
rEsuLTs: Overall, compared to South Asians (OR=1.00), Filipinos had higher
odds of having ‘at least 1’ chronic condition (OR=1.29, 95% CI: 1.04-1.62), whereas
Chinese (0.63, 0.474-0.9) and Arab-Canadians had lower odds (0.38, 0.28-0.51).
Compared to the normal weight BMI category in each respective ethnic group, the
association between overweight and obesity on ‘at least 1’ chronic condition was
highest amongst Chinese (overweight: 3.6, 2.34-5.63; obese: 8.9, 3.6-22.01), whereas
no significant gradient was observed in Japanese, Arab, and West Asian sub-groups.
Using normal weight South Asians as the referent, obese Chinese, South Asian,
Filipino, West Asian, and Korean groups were approximately 3-times as likely to
report ‘at least 1’ chronic condition.
CONCLusIONs: The relationship between overweight, obesity, and health risk
varied within Asian-Canadian subgroups, and was strongest for Chinese-Canadians.
Reliance on traditional BMI thresholds and broad categories of ethnicity may mask
cardiometabolic health risk in need of targeted intervention.
1655 Board #247 May 30, 2:00 PM - 3:30 PM
Changes in Walking for Transportation among u.s. adults
2005-2010, National health Interview survey
Prabasaj Paul, Susan A. Carlson, Dianna D. Carroll, Janet E.
Fulton, FACSM. Centers for Disease Control and Prevention,
Atlanta, GA.
(No relationships reported)
Walking is the most commonly reported physical activity among U.S. adults and is one
of the ways to obtain adequate aerobic physical activity for substantial health benefits.
PurPOsE:To estimate changes in prevalence of participation in, and mean volume
of, transportation walking among U.S. adults from 2005 to 2010, by demographic
characteristics and BMI category.
METhOds: Data from the core and Cancer Control Supplement of the National
Health Interview Survey - an interviewer-administered survey of U.S. adults - from
2005 (n=26,372) and 2010 (n=23,147) were examined for transportation walking
prevalence (≥1 ≥10-minute bout in the previous 7 days) and for mean walking volume.
Data were examined by sex, age group, race/ethnicity, education, BMI category and
adherence to the aerobic component of the 2008 Physical Activity Guidelines for
adults.
rEsuLTs: In almost every group examined, transportation walking prevalence did
not change significantly whereas transportation walking volume decreased significantly
from 2005 to 2010. Overall, the change in prevalence of transportation walking [2005:
29.2%; 95% CI (28.2%, 30.1%); 2010: 30.2% (29.3%, 31.1%)] was not significant,
but the population mean volume (minutes/week) of transportation walking decreased
significantly [2005: 44.1 (41.3, 46.9); 2010: 32.1 (29.6, 34.6)]. Some groups, however,
increased prevalence and decreased volume of transportation walking, including men
[prevalence 2005: 30.8% (29.7%, 31.9%); 2010: 32.6% (31.4%, 33.8%) and volume
2005: 52.7 (48.3, 57.2); 2010: 36.4 (33.0, 39.9)], and Hispanic Americans [prevalence
Vol. 45 No. 5 Supplement S329
2005: 30.4% (28.5%, 32.3%); 2010: 33.3% (31.4%, 35.1%) and volume 2005:
57.0 (49.9, 64.0); 2010: 45.1 (38.2, 52.0)]. Findings are similar for mean volume of
transportation walking among those who walk for transportation.
CONCLusIONs: From 2005 to 2010, prevalence of participation in transportation
walking remained the same; however, mean time spent walking for transportation
decreased. These findings demonstrate that prevalence and mean volume are
distinct measures that should both be included for a more comprehensive view of
transportation walking behavior. The distinction between the measures should be
considered when designing surveillance systems, setting health behavior targets and
targeting interventions.
1656 Board #248 May 30, 2:00 PM - 3:30 PM
association Between 25-hydroxyvitamin d and
Cardiorespiratory Fitness In The National health and
Nutrition Examination survey
Patrick B. Wilson, John Fitzgerald, Stacy J. Ingraham. University
of Minnesota, Minneapolis, MN.
(No relationships reported)
BaCKGrOuNd: Low cardiorespiratory fitness (CRF) and serum 25-hydroxyvitamin
D (25[OH]D) are associated with cardiovascular morbidity/mortality. Studies suggest
that 25(OH)D is associated with CRF but have come from selective samples.
PurPOsE: To examine the association between CRF and serum 25(OH)D from
a nationally representative sample, the National Health and Nutrition Examination
Survey (NHANES).
METhOds: Participants aged 12-49 were eligible for a CRF test, which involved a
submaximal walking protocol to estimate VO . Participants were assigned to one of
2max
eight protocols based on sex, age, body mass index (BMI), and self-reported physical
activity. Estimated VO values > 75 ml/kg/min were recoded as 75 ml/kg/min 2max .
Serum 25(OH)D was assessed with the Diasorin assay. The Pearson correlation was
used to examine the bivariate association between CRF and serum 25(OH)D. SPSS
Complex Samples general linear model was used to adjust for potential covariates and
account for the complex sampling design of NHANES. Means and standard errors for
descriptive statistics were calculated using Complex Samples.
rEsuLTs: CRF, serum 25(OH)D, and covariate data were available from 5,392
participants from the 2001-2002 and 2003-2004 NHANES (out of 21,161).
Approximately 48% of the sample was female, and the average age and BMI were 28.9
± 0.2 years and 26.0 ± 0.1 kg/m2. Mean serum 25(OH)D was 24.8 ± 0.3 ng/ml, with
33.4% classified as deficient (< 20 ng/ml). Mean VO2max was 40.4 ± 0.3 ml/kg/min.
Serum 25(OH)D was significantly positively correlated with estimated VO2max (r =
.099, p < .001). In a multivariate model including age, gender, race/ethnicity, season
(winter vs. summer), self-reported physical activity, and BMI, serum 25(OH)D was not
significantly associated with estimated VO2max (Beta = .03, p = .277). However, when
classifying serum 25(OH)D in terms of deficiency (< 20 ng/ml), there was a significant
effect, with deficient participants having a 1.14 ml/kg/min lower estimated VO2max
(p = .005).
CONCLusIONs: Among healthy individuals, 25(OH)D analyzed as a continuous
measure is not significantly associated with CRF after adjusting for relevant covariates.
In contrast, when analyzed in terms of deficiency, 25(OH)D does show a significant
association with CRF, although the clinical significance is unknown.
1657 Board #249 May 30, 2:00 PM - 3:30 PM
If you Build It, Who Will Come? analysis of 1710 activity
areas in 50 Community Parks
Thomas L. McKenzie, FACSM 1 , Deborah A. Cohen 2 ,
Williamson Stephanie 2 , Terry Marsh 2 , Kathryn P. Derose 2 . 1 San
Diego State University, San Diego, CA. 2 RAND Corporation,
Santa Monica, CA.
(No relationships reported)
Community parks are important resources for population level leisure time physical
activity (PA), especially for those in low-income areas. Few studies have examined
how specific activity area types within parks serve community residents.
PurPOsE: To assess relationships among park area/facility types and observed area
and user characteristics (e.g., PA, gender, and age, race/ethnicity).
METhOds: Trained observers used the System for Observing Physical Activity and
Recreation in Communities (SOPARC) to assess the use and PA of 1710 activity areas
in 50 parks that served a wide diversity of racial/ethnic groups and income levels in
Los Angeles. Each area was observed 4 times/day for each day of the week (7d).
rEsuLTs: We made 47,732 activity area visits and observed 104,101 park users,
including children (32%), adolescents (14%), adults (51%), and seniors (4%). Over 60
activity area types were seen; all parks had playgrounds, and most had gymnasiums
(92%), outdoor basketball courts (88%), and baseball/softball fields (80%). Areas
were accessible (91%) and usable (98%) most of the time, but rarely equipped (3%),
supervised (2%), or organized (2%) and were often empty (67%). Area types were used
differentially by gender, age, and race/ethnicity groupings. Most park visitors were
male (62%), and they dominated sport facilities, including basketball (91%), soccer
(82%), and baseball/softball (71%) areas and accrued greater person-MET values than
females in all areas except playgrounds (overall observed number x MET intensity =
Abstracts were prepared by the authors and printed as submitted.
Thursday, May 30, 2013