@Article{info:doi/10.2196/40908,
author="Baldwin, Austin S
and Lamb, Colin L
and Geary, Bree A
and Mitchell, Alexis D
and Kouros, Chrystyna D
and Levens, Sara
and Martin, Laura E",
title="Testing and Optimizing Guided Thinking Tasks to Promote Physical Activity: Protocol for a Randomized Factorial Trial",
journal="JMIR Res Protoc",
year="2022",
month="Sep",
day="8",
volume="11",
number="9",
pages="e40908",
keywords="physical activity; optimization; brief intervention; episodic future thinking; positive affective imagery; planning; exercise",
abstract="Background: Insufficient physical activity is associated with various health risks; however, most current physical activity interventions have critical barriers to scalability. Delivering interventions via technology and identifying active and inert components in early-phase development are ways to build more efficient and scalable interventions. We developed a novel intervention to promote physical activity that targets 3 brief guided thinking tasks, separately and in combination, using brief audio recordings: (1) episodic future thinking (EFT), (2) positive affective imagery (PAI), and (3) planning. Objective: The aim of this GeT (Guided Thinking) Active study is to optimize a scalable guided thinking intervention to promote physical activity using principles of the Multiphase Optimization Strategy (MOST). Mechanism-focused analyses will inform which components are optimal candidates for inclusion in an intervention package and which need refinement. Methods: We will enroll 192 participants randomized to receive intervention components delivered via an audio recording that they will listen to prior to weekly in-lab physical activity sessions. Participants in the high dose conditions will also be instructed to listen to the audio recording 4 additional days each week. We will evaluate effects of the components on physical activity over 6 weeks in a 2 (EFT vs recent thinking) {\texttimes} 2 (PAI vs neutral imagery) {\texttimes} 2 (planning vs no planning) {\texttimes} 2 (dose: 5{\texttimes}/week vs 1{\texttimes}/week) full factorial randomized trial. Results: The National Cancer Institute funded this study (R21CA260360) on May 13, 2021. Participant recruitment began in February 2022. Data analysis will begin after the completion of data collection. Conclusions: The GeT Active study will result in a scalable, audio-recorded intervention that will accelerate progress toward the full development of guided thinking interventions to promote physical activity. Trial Registration: ClinicalTrials.gov NCT05235360; https://clinicaltrials.gov/ct2/show/NCT05235360 International Registered Report Identifier (IRRID): DERR1-10.2196/40908 ",
issn="1929-0748",
doi="10.2196/40908",
url="https://www.researchprotocols.org/2022/9/e40908",
url="https://doi.org/10.2196/40908",
url="http://www.ncbi.nlm.nih.gov/pubmed/36074550"
}