Erika R Shaver1, Kellye C McGlumphy2, Amaanat K Gill2, Rebecca E Hasson3. 1. Graduate Research Assistant, Childhood Disparities Research Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI. 2. Undergraduate Research Assistant, Childhood Disparities Research Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, MI. 3. Associate Professor, School of Kinesiology, University of Michigan, Ann Arbor, MI;, Email: hassonr@umich.edu.
Abstract
Objectives: In this study, we examined the inter-relationships between Transtheoretical Model (TTM) constructs (stages of change, self-efficacy, decisional balance, processes of change) and determined the utility of TTM to predict physical activity in African-American youth. Methods: A community-based sample of 109 African-American youth (62% girls, age: 14.8 ± 0.2 years) were included in this analysis. TTM constructs were assessed using the Patient-Centered Assessment and Counseling for Exercise questionnaire. Moderate-to-vigorous physical activity (MVPA) and total physical activity (TPA) were measured objectively using accelerometry. Results: Higher self-efficacy was observed at higher stages of change in both boys and girls (p = .02). Despite higher MVPA (p < .001) and TPA (p < .001) in boys, there were no sex differences in TTM constructs (p > .05). Stages of change predicted MVPA in girls, with those in the maintenance stage reporting significantly more MVPA compared to those in precontemplation/contemplation (p = .03) and preparation stages (p = .04). Cons predicted higher TPA in boys only (p = .02). Conclusions: These findings suggest specific TTM constructs relate to physical activity in African-American youth and the importance of these constructs may differ by sex.
Objectives: In this study, we examined the inter-relationships between Transtheoretical Model (TTM) constructs (stages of change, self-efficacy, decisional balance, processes of change) and determined the utility of TTM to predict physical activity in African-American youth. Methods: A community-based sample of 109 African-American youth (62% girls, age: 14.8 ± 0.2 years) were included in this analysis. TTM constructs were assessed using the Patient-Centered Assessment and Counseling for Exercise questionnaire. Moderate-to-vigorous physical activity (MVPA) and total physical activity (TPA) were measured objectively using accelerometry. Results: Higher self-efficacy was observed at higher stages of change in both boys and girls (p = .02). Despite higher MVPA (p < .001) and TPA (p < .001) in boys, there were no sex differences in TTM constructs (p > .05). Stages of change predicted MVPA in girls, with those in the maintenance stage reporting significantly more MVPA compared to those in precontemplation/contemplation (p = .03) and preparation stages (p = .04). Cons predicted higher TPA in boys only (p = .02). Conclusions: These findings suggest specific TTM constructs relate to physical activity in African-American youth and the importance of these constructs may differ by sex.