Self-Efficacy and Planning as Predictors of Physical Activity in the Context of Workplace Health Promotion.

Abstract

Fostering self-efficacy and planning in individuals can support the uptake and maintenance of regular physical activity. This study examined self-efficacyand planning as mechanisms of an online-delivered workplace health promotion intervention to enhance employees' physical activity. A special focus layon reciprocal interrelations among self-efficacy and planning over time, as previous work predominantly accounted for only one predictive direction at a time. Datafrom N = 1,063 employees of a pharmaceutical company who reported an intention to increase their physical activity levels were assessed at three measurement points up to 12 weeks following the intervention. Cross-lagged panel analyses were performed to examine effects of self-efficacy and planning on physical activity as well as reciprocal interrelations between self-efficacy and planning. Findings indicated an increase in self-efficacy, planning, and physical activity following the intervention. Planning was consistently linked to subsequent physical activity, whereas self-efficacy was not associated. Also, reciprocal interrelations among self-efficacy and planning were found across both measurement lags. Planning was confirmed as a predictor of physical activity, whereas self-efficacy was not. However, cross-lagged interrelations indicated reciprocal reactivation among self-efficacy and planning over time, suggesting beneficial effects of including strategies that foster both volitional constructs in interventions.