Magdalena Wilczynska1,2, David R Lubans1, Stefania Paolini3, Ronald C Plotnikoff4. 1. Priority Research Centre for Physical Activity and Nutrition, Advanced Technology Center, The University of Newcastle, Level 3, University Drive, Callaghan, NSW, 2308, Australia. 2. School of Psychology, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia. 3. School of Psychology, The University of Newcastle, SO E1.22 Science Offices, Ourimbah, NSW, Australia. 4. Priority Research Centre for Physical Activity and Nutrition, Advanced Technology Center, The University of Newcastle, Level 3, University Drive, Callaghan, NSW, 2308, Australia. ron.plotnikoff@newcastle.edu.au.
Abstract
BACKGROUND: The study aim was to examine the mechanisms of physical activitybehaviour change in the multi-component eCoFit randomised controlled trial (RCT) among adults diagnosed with, or at risk of, T2D. METHOD: The RCT included two phases: phase 1 (weeks 1-10) integrated group sessions (outdoor physical activity and cognitive mentoring) and the use of the eCoFit smartphone application (app), and phase 2 (weeks 11-20), which included the use of the eCoFit smartphone application only. Participants (n = 84) were assessed at baseline and 10 and 20 weeks from baseline. Physical activity was assessed using pedometers, and the following mediators were tested: action self-efficacy, barrier self-efficacy, recovery self-efficacy, implementation intentions, intention to have regular physical activity, outcome expectations, risk perception and implicit associations related to physical activity. The PROCESS INDIRECT Macro was used to perform mediation analyses. RESULTS: Significant mediation pathways were found for implementation intention measured at 10 weeks, AB (95% CI = 486.04 [128.19, 1073.42]). No significant pathways were found for the other social-cognitive and implicit attitudinal mediators. CONCLUSION: Increased daily steps among the intervention participants were explained by increased implementation intentions. The eCoFit study successfully operationalised implementation intentions in the smartphone app designed to promote outdoor physical activity. TRIAL REGISTRATION: The trial was approved by a University Human Research Committee and is registered with the Australian New Zealand Clinical Trial Registry (ACTRN12615000990527).
RCT Entities:
BACKGROUND: The study aim was to examine the mechanisms of physical activity behaviour change in the multi-component eCoFit randomised controlled trial (RCT) among adults diagnosed with, or at risk of, T2D. METHOD: The RCT included two phases: phase 1 (weeks 1-10) integrated group sessions (outdoor physical activity and cognitive mentoring) and the use of the eCoFit smartphone application (app), and phase 2 (weeks 11-20), which included the use of the eCoFit smartphone application only. Participants (n = 84) were assessed at baseline and 10 and 20 weeks from baseline. Physical activity was assessed using pedometers, and the following mediators were tested: action self-efficacy, barrier self-efficacy, recovery self-efficacy, implementation intentions, intention to have regular physical activity, outcome expectations, risk perception and implicit associations related to physical activity. The PROCESS INDIRECT Macro was used to perform mediation analyses. RESULTS: Significant mediation pathways were found for implementation intention measured at 10 weeks, AB (95% CI = 486.04 [128.19, 1073.42]). No significant pathways were found for the other social-cognitive and implicit attitudinal mediators. CONCLUSION: Increased daily steps among the intervention participants were explained by increased implementation intentions. The eCoFit study successfully operationalised implementation intentions in the smartphone app designed to promote outdoor physical activity. TRIAL REGISTRATION: The trial was approved by a University Human Research Committee and is registered with the Australian New Zealand Clinical Trial Registry (ACTRN12615000990527).
Authors: Sheri R Colberg; Ronald J Sigal; Bo Fernhall; Judith G Regensteiner; Bryan J Blissmer; Richard R Rubin; Lisa Chasan-Taber; Ann L Albright; Barry Braun Journal: Diabetes Care Date: 2010-12 Impact factor: 19.112
Authors: Magdalena Wilczynska; David R Lubans; Kristen E Cohen; Jordan J Smith; Sara L Robards; Ronald C Plotnikoff Journal: Contemp Clin Trials Date: 2016-06-28 Impact factor: 2.226