title: How are previous physical activity and self-efficacy related to future physical activity and self-efficacy?
abstract: Self-efficacy (SE) has been found to be a robust predictor of success in achieving physical activity (PA) goals. While much of the current research has focused on SE as a trait, SE as a state has received less attention. Using day-to-day measurements obtained over 84 days, we examined the relationship between state SE and PA. Postmenopausal women (n = 71) participated in a 12-week PA intervention administered via cell phone and monitored their daily PA using a pedometer. At the end of each day, they reported their state SE and number of steps. Using a longitudinal model, state SE was found to be a robust predictor of PA even after accounting for trait SE and other covariates. The findings offer insights about the temporal relationship between SE and PA over the course of an intervention, which can be of interest to researchers and intervention designers.
authors.affiliation: The Edward R. Murrow College of Communication, Washington State University, Pullman, WA, USA prabu.david@wsu.edu.
authors.forename: Prabu
authors.initials: P
authors.lastname: David
authors.affiliation: Division of Biostatistics, College of Public Health, Ohio State University, Columbus, OH, USA.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Pennell
authors.affiliation: Division of Epidemiology, College of Public Health, Ohio State University, Columbus, OH, USA.
authors.forename: Randi E
authors.initials: RE
authors.lastname: Foraker
authors.affiliation: Division of Health Behavior and Health Promotion, College of Public Health, Ohio State University, Columbus, OH, USA.
authors.forename: Mira L
authors.initials: ML
authors.lastname: Katz
authors.affiliation: Department of Kinesiology, University of Georgia, Athens, GA, USA.
authors.forename: Janet
authors.initials: J
authors.lastname: Buckworth
authors.affiliation: Department of Internal Medicine, College of Medicine, Ohio State University, Columbus, OH, USA.
authors.forename: Electra D
authors.initials: ED
authors.lastname: Paskett
mesh_terms: D040421:Cell Phone; D015444:Exercise / Q000523:psychology*; D005260:Female; D015438:Health Behavior; D006801:Humans; D017698:Postmenopause; D020377:Self Efficacy; D016138:Walking / Q000523:psychology
keywords: behavioral intervention technology; health behavior change; mixed models; self-efficacy