University of Hertfordshire

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Original languageEnglish
Pages (from-to)1378-1391
JournalJournal of Health Psychology
Early online date27 Nov 2017
Publication statusPublished - Sep 2019


This study examined the constructs of Capability, Opportunity, and Motivation from the COM-B model and their influence on moderate-to-vigorous physical activity (MVPA). Using a prospective survey design, 186 healthy adults completed measures representing the Theoretical Domains Framework mapped to the COM-B, and MVPA one week later. The main indicators for the COM constructs were ‘habits’ (Capability), ‘subjective norms’ (Opportunity), and ‘exercise self-identity’ (Motivation). Motivation (77%) and MVPA (50%) were strongly predicted, with Capability and Motivation as key drivers of behaviour. Motivation was a strong mediator for Capability on behaviour. Future research should consider this approach for other populations and behaviours.


The final, definitive version of this paper has been published in Journal of Health Psychology, November 2017, doi:, published by SAGE Publishing, All rights reserved.

ID: 10345450