This study consisted of three sub-studies. The problem of this study was to (1) examine the relationship between leisure-time physical activity (LTPA) and obesity among African Americans (sub-study #1), (2) construct a valid and reliable instrument based on previous studies (sub-study #2), and (3) develop and test an explicative social-ecological model of LTPA including six contributory factors to LTPA (substudy #3): self-efficacy, self-regulation, social support, perceived physical environment, outcome expectancy, and policy belief.
This study was a cross-sectional non-experimental study using a 96-item questionnaire. A total of 649 African Americans going to churches were recruited from 27 churches in Indianapolis. The instrument was developed and finalized through a process of reviewing literature, expert's review and pilot test. In examining the relationship between LTPA and obesity (sub-study #1), LTPA was classified based on the 2008 Physical Activity Guidelines for Americans (USDHHS, 2008). Logistic regression approach (n=614) was used to examine the relationship between LTPA and obesity with and without controlling for daily physical activity beyond LTPA and/or other correlates. The reliability and validity of six contributory factors to assess LTPA engagement among African Americans (n=569) were examined using item analysis, exploratory factor analysis, and multiple-group confirmatory factor analytic techniques (sub-study #2). Structural equation modeling (n=569) was used to test a social-ecological model of LTPA (sub-study #3).
Main findings of this study were: (1) the data showed an inverse graded relationship between the total volume of LTPA and obesity for African American women, but not for men; (2) all six refined scales were cross-validated by splitting the sample into two halves; and (3) the developed social-ecological model of LTPA fit the data well based on major fit indices.
Main conclusions of this study were: (1) African American women who accumulate a high volume of LTPA (i.e., 300 minutes or more per week) are less likely to be obese; (2) the six refined scales (including corresponding subscales) to measure contributory factors to LTPA among African Americans were shown reliable and valid; and (3) a multilevel approach involving intrapersonal, interpersonal, environmental, and policy factors is recommended in physical activity behavior intervention.
|Commitee:||Kay, Noy S., Kolbe, Lloyd J., Peng, Chao-Ying J., Torabi, Mohammad R.|
|Department:||School of Health, Physical Education and Recreation|
|School Location:||United States -- Indiana|
|Source:||DAI-B 71/04, Dissertation Abstracts International|
|Subjects:||African American Studies, Black studies, Behavioral psychology, Public health, Recreation|
|Keywords:||African-American, Indiana, Indianapolis, Leisure, Leisure-time physical activity, Obesity, Physical activity, Social cognitive theory, Social ecological model|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be