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Effects of Two Web‐Based Interventions and Mediating Mechanisms on Stage of Change Regarding Physical Activity in Older Adults
Author(s) -
Ratz Tiara,
Lippke Sonia,
Muellmann Saskia,
Peters Manuela,
Pischke Claudia R.,
Meyer Jochen,
Bragina Inna,
VoelckerRehage Claudia
Publication year - 2020
Publication title -
applied psychology: health and well‐being
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.276
H-Index - 31
eISSN - 1758-0854
pISSN - 1758-0846
DOI - 10.1111/aphw.12174
Subject(s) - social cognitive theory , intervention (counseling) , mediation , psychological intervention , cognition , psychology , randomized controlled trial , confidence interval , physical therapy , medicine , developmental psychology , psychiatry , surgery , political science , law
Background Web‐based, theory‐driven interventions effectively promote older adults’ physical activity. Social‐cognitive mechanisms of their effect on stage of change need to be further researched. Methods Older adults were randomly allocated to intervention group 1 (10‐week online physical activity program), intervention group 2 (same program plus activity tracker), or delayed intervention control group; n = 351 were analyzed (59.6% of originally allocated individuals). Stages of change for recommended endurance and strength training and social‐cognitive predictors of physical activity were assessed using questionnaires at baseline and follow‐up. Intervention effects and mediation were investigated using mixed‐effects ANOVA and ordinal least squares regression. Results Direct effects on stage of change were found for intervention group 1 regarding endurance training ( b intervention group 1 = 0.44, 95% confidence interval [0.15, 0.73]), and both groups regarding strength training ( b intervention group 1 = 1.02, [0.71, 1.33], b intervention group 2 = 1.24, [0.92, 1.56]). Social‐cognitive predictor changes in task self‐efficacy, intention, and action planning explained intervention effect on stage of change, but not to the full extent. Conclusions The results indicate significant web‐based intervention effects on physical activity stage, partly mediated by changes in task self‐efficacy, intention, and action planning.