Tpb Predicts Objectively Measured Walking Behaviour, but not Behaviour Change, in a General Practice Sample

Abstract

Background: Previous research has demonstrated TPB variables as consistent predictors of physical activity intentions and behaviour. Yet studies have shown that TPB variables do not predict objectively measured behaviour, but these studies had sample and method limitations. This study aimed to assess which TPB variables predicted objective walking behaviour, and behaviour change, in a general practice sample. Methods:N=315 general practice patients were recruited as part of a randomised controlled trial. Patients completed a TPB questionnaire, and wore a NL-1000 pedometer. Multiple hierarchical regression analyses were conducted. Findings: TPB variables explained 42%-51% of the variance in intentions. Intention and PBC predicted walking behaviour at 6 weeks and 6 months, with 5.8%-5.9% unique variance explained. When past behaviour was controlled for TPB variables failed to predict change in walking behaviour. Discussion: TPB variables are predictive of intentions and objective walking behaviour, but not behaviour change, in the current sample. Past behaviour was the most important predictor of future behaviour, suggesting walking is a habitual behaviour.