Dissertation/Thesis Abstract

An explicative model of leisure-time physical activities among church-going African Americans in Indianapolis
by Li, Kaigang, Ph.D., Indiana University, 2010, 207; 3397482
Abstract (Summary)

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.

Indexing (document details)
Advisor: Seo, Dong-Chul
Commitee: Kay, Noy S., Kolbe, Lloyd J., Peng, Chao-Ying J., Torabi, Mohammad R.
School: Indiana University
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
Publication Number: 3397482
ISBN: 978-1-109-69378-2
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