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A prospective study exploring the construct and predictive validity of the COM-B model for physical activity.

Neil Howlett1, Joerg Schulz1, Daksha Trivedi1

  • 11 University of Hertfordshire, UK.

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|November 28, 2017
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Motivation and capability significantly drive physical activity. Motivation acts as a key mediator, linking capability to increased moderate-to-vigorous physical activity in adults.

Keywords:
COM-Bhealth behaviourphysical activitytheoretical domains framework

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Area of Science:

  • Behavioral Science
  • Health Psychology
  • Exercise Science

Background:

  • The COM-B (Capability, Opportunity, Motivation, Behavior) model is a leading framework for understanding health behavior change.
  • Identifying key drivers of physical activity is crucial for designing effective public health interventions.

Purpose of the Study:

  • To investigate the influence of capability, opportunity, and motivation on moderate-to-vigorous physical activity (MVPA) within the COM-B framework.
  • To examine the mediating role of motivation in the relationship between capability and MVPA.

Main Methods:

  • Prospective survey design involving 186 healthy adults.
  • Measurement of COM-B constructs (Capability, Opportunity, Motivation) and MVPA using validated scales.
  • Mapping theoretical domains to COM-B constructs, with 'habits' for Capability, 'subjective norms' for Opportunity, and 'exercise self-identity' for Motivation.

Main Results:

  • Motivation (77%) and MVPA (50%) were strongly predicted by the COM-B constructs.
  • Capability and Motivation emerged as the primary drivers of physical activity behavior.
  • Motivation significantly mediated the effect of Capability on MVPA.

Conclusions:

  • Capability and Motivation are critical components influencing engagement in moderate-to-vigorous physical activity.
  • Interventions targeting motivation may enhance the impact of capability-focused strategies on physical activity.
  • The COM-B model, integrated with the theoretical domains framework, provides a robust approach for studying health behaviors.